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Document and Entity Information - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Jan. 30, 2016	Jul. 11, 2016	Jul. 31, 2015
Document Type	10-K
Amendment Flag	false
Document Period End Date	Jan. 30, 2016
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	FY
Trading Symbol	MRVL
Entity Registrant Name	MARVELL TECHNOLOGY GROUP LTD
Entity Central Index Key	0001058057
Current Fiscal Year End Date	--01-30
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	No
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		511.2
Entity Public Float			$ 4,380

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jan. 30, 2016	Jan. 31, 2015
Current assets:
Cash and cash equivalents	$ 1,278,180	$ 1,210,977
Short-term investments	1,004,569	1,318,578
Accounts receivable, net of provision for sales returns and allowances of $2,762 and $2,112 in fiscal 2016 and 2015, respectively	323,300	420,955
Inventories	210,017	308,162
Prepaid expenses and other current assets	102,560	68,140
Deferred income taxes		17,228
Total current assets	2,918,626	3,344,040
Property and equipment, net	299,540	340,639
Long-term investments	11,296	10,226
Goodwill	2,029,945	2,029,945
Acquired intangible assets, net	18,010	30,698
Other non-current assets	164,710	128,839
Total assets	5,442,127	5,884,387
Current liabilities:
Accounts payable	180,372	282,899
Accrued liabilities	132,060	131,388
Carnegie Mellon University accrued litigation settlement	736,000
Accrued employee compensation	121,631	154,969
Deferred income	55,722	68,120
Total current liabilities	1,225,785	637,376
Non-current income taxes payable	49,256	68,729
Other non-current liabilities	26,963	32,193
Total liabilities	1,302,004	738,298
Commitments and contingencies (Note 10)
Shareholders' equity:
Preferred stock, $0.002 par value; 8,000 shares authorized; no shares issued and outstanding
Common stock, $0.002 par value; 992,000 shares authorized; 507,572 and 515,037 shares issued and outstanding in fiscal 2016 and 2015, respectively	1,015	1,030
Additional paid-in capital	3,028,921	3,099,548
Accumulated other comprehensive income (loss)	(795)	308
Retained earnings	1,110,982	2,045,203
Total shareholders' equity	4,140,123	5,146,089
Total liabilities and shareholders' equity	$ 5,442,127	$ 5,884,387

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Jan. 30, 2016	Jan. 31, 2015
Accounts receivable, provision for sales return and allowances	$ 2,762	$ 2,112
Preferred stock, par value	$ 0.002	$ 0.002
Preferred stock, shares authorized	8,000,000	8,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.002	$ 0.002
Common stock, shares authorized	992,000,000	992,000,000
Common stock, shares issued	507,572,000	515,037,000
Common stock, shares outstanding	507,572,000	515,037,000

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jan. 30, 2016	Jan. 31, 2015	Feb. 01, 2014
Net revenue	$ 2,725,828	$ 3,706,963	$ 3,404,400
Operating costs and expenses:
Cost of goods sold	1,494,736	1,843,706	1,663,730
Research and development	1,054,257	1,158,810	1,153,999
Selling and marketing	128,780	143,952	151,903
General and administrative	146,128	124,841	105,420
Carnegie Mellon University litigation settlement	654,667
Restructuring and other related charges	53,251	10,438	4,732
Amortization and write-off of acquired intangible assets	10,748	16,397	43,925
Total operating costs and expenses	3,542,567	3,298,144	3,123,709
Operating income (loss)	(816,739)	408,819	280,691
Interest and other income, net	17,685	23,334	25,566
Income (loss) before income taxes	(799,054)	432,153	306,257
Provision (benefit) for income taxes	12,346	(3,193)	(9,063)
Net income (loss)	$ (811,400)	$ 435,346	$ 315,320
Net income (loss) per share:
Basic	$ (1.59)	$ 0.85	$ 0.64
Diluted	$ (1.59)	$ 0.84	$ 0.63
Weighted average shares:
Basic	510,945	511,089	496,518
Diluted	510,945	520,760	504,413
Cash dividends declared per share	$ 0.24	$ 0.24	$ 0.24

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Jan. 30, 2016	Jan. 31, 2015	Feb. 01, 2014
Net income (loss)	$ (811,400)	$ 435,346	$ 315,320
Other comprehensive income (loss), net of tax:
Net change in unrealized gain (loss) on marketable securities	(4,424)	1,234	(208)
Net change in unrealized gain (loss) on auction rate securities	2,274	597	(190)
Net change in unrealized gain (loss) on cash flow hedges	1,047	(2,120)	(153)
Net current-period other comprehensive income (loss), net of tax	(1,103)	(289)	(551)
Comprehensive income (loss), net of tax	$ (812,503)	$ 435,057	$ 314,769

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References + Details

CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings
Balance (in shares) at Feb. 02, 2013		508,338
Balance at Feb. 02, 2013	$ 4,484,595	$ 1,017	$ 2,945,643	$ 1,148	$ 1,536,787
Shares issued pursuant to stock options and awards	133,299	$ 37	133,262
Shares issued pursuant to stock options and awards, Shares		18,503
Issuance of common stock under the employee stock purchase plan (in shares)		9,701
Issuance of common stock under the employee stock purchase plan	71,663	$ 19	71,644
Cancellation of restricted stock units for net share settlement	(10,872)	$ (2)	(10,870)
Cancellation of restricted stock units for net share settlement, Shares		(1,024)
Share-based compensation	156,126		156,126
Tax (deficiency) benefit from employee stock transactions	(88)		(88)
Repurchase of common stock (In Shares)		(33,113)
Repurchase of common stock	(354,133)	$ (66)	(354,067)
Cash dividends declared and paid (cumulatively $0.24 per share)	(119,449)				(119,449)
Net income	315,320				315,320
Other comprehensive loss	(551)			(551)
Balance (in shares) at Feb. 01, 2014		502,405
Balance at Feb. 01, 2014	4,675,910	$ 1,005	2,941,650	597	1,732,658
Shares issued pursuant to stock options and awards	38,039	$ 19	38,020
Shares issued pursuant to stock options and awards, Shares		9,673
Issuance of common stock under the employee stock purchase plan (in shares)		9,690
Issuance of common stock under the employee stock purchase plan	74,318	$ 19	74,299
Cancellation of restricted stock units for net share settlement	(26,494)	$ (3)	(26,491)
Cancellation of restricted stock units for net share settlement, Shares		(1,661)
Share-based compensation	137,001		137,001
Tax (deficiency) benefit from employee stock transactions	21		21
Repurchase of common stock (In Shares)		(5,070)
Repurchase of common stock	(64,962)	$ (10)	(64,952)
Cash dividends declared and paid (cumulatively $0.24 per share)	(122,801)				(122,801)
Net income	435,346				435,346
Other comprehensive loss	(289)			(289)
Balance (in shares) at Jan. 31, 2015		515,037
Balance at Jan. 31, 2015	5,146,089	$ 1,030	3,099,548	308	2,045,203
Shares issued pursuant to stock options and awards	21,779	$ 16	21,763
Shares issued pursuant to stock options and awards, Shares		8,022
Issuance of common stock under the employee stock purchase plan (in shares)		5,890
Issuance of common stock under the employee stock purchase plan	58,938	$ 11	58,927
Cancellation of restricted stock units for net share settlement	(24,358)	$ (3)	(24,355)
Cancellation of restricted stock units for net share settlement, Shares		(1,677)
Share-based compensation	133,766		133,766
Tax (deficiency) benefit from employee stock transactions	108		108
Repurchase of common stock (In Shares)		(19,700)
Repurchase of common stock	(260,875)	$ (39)	(260,836)
Cash dividends declared and paid (cumulatively $0.24 per share)	(122,821)				(122,821)
Net income	(811,400)				(811,400)
Other comprehensive loss	(1,103)			(1,103)
Balance (in shares) at Jan. 30, 2016		507,572
Balance at Jan. 30, 2016	$ 4,140,123	$ 1,015	$ 3,028,921	$ (795)	$ 1,110,982

CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares	12 Months Ended
	Jan. 30, 2016	Jan. 31, 2015	Feb. 01, 2014
Cash dividends declared and paid	$ 0.24	$ 0.24	$ 0.24

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Jan. 30, 2016	Jan. 31, 2015	Feb. 01, 2014
Cash flows from operating activities:
Net income (loss)	$ (811,400)	$ 435,346	$ 315,320
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	100,176	106,248	102,752
Share-based compensation	133,779	137,246	155,873
Amortization and write-off of acquired intangible assets	12,688	18,337	44,006
Gain on sale of business			(6,975)
Non-cash restructuring and other related charges	16,032	17	61
Loss (gain) from investments in privately-held companies	3,503	(8,829)	1,500
Amortization (accretion) of premium /discount on available-for-sale securities	8,112	(3,582)	7,916
Other non-cash expense (income), net	2,196	1,765	(1,299)
Excess tax benefits from share-based compensation	(26)	(145)	(20)
Deferred income tax	6,096	(12,913)	3,919
Changes in assets and liabilities, net of assets acquired and liabilities assumed in acquisitions:
Accounts receivable	97,655	34,165	(123,258)
Inventories	90,586	39,454	(97,188)
Prepaid expenses and other assets	(23,209)	5,788	19,458
Accounts payable	(105,898)	(43,871)	39,791
Accrued liabilities and other non-current liabilities	(15,202)	(30,024)	(9,627)
Carnegie Mellon University accrued litigation settlement	736,000
Accrued employee compensation	(33,338)	43,561	(5,787)
Deferred income	(12,398)	6,373	1,597
Net cash provided by operating activities	205,352	728,936	448,039
Cash flows from investing activities:
Purchases of available-for-sale securities	(1,056,045)	(1,128,319)	(837,892)
Sales of available-for-sale securities	991,657	534,908	588,712
Maturities of available-for-sale securities	311,843	291,402	406,327
Investments in privately-held companies	(41)	(701)	(1,869)
Proceeds from sale of an investment in a privately-held company		13,220
Cash paid for acquisitions, net			(2,551)
Proceeds from sale of business			6,306
Purchases of technology licenses	(8,236)	(16,424)	(17,647)
Purchases of property and equipment	(37,255)	(63,030)	(66,593)
Purchases of equipment previously leased	(10,240)
Proceeds from equipment held for sale	10,007
Net cash provided by (used in) investing activities	201,690	(368,944)	74,793
Cash flows from financing activities:
Repurchase of common stock	(260,875)	(64,962)	(376,285)
Proceeds from employee stock plans	80,717	112,357	204,962
Minimum tax withholding paid on behalf of employees for net share settlement	(24,358)	(26,494)	(10,872)
Dividend payments to shareholders	(122,821)	(122,801)	(119,449)
Payments on technology license obligations	(12,528)	(13,010)	(7,411)
Excess tax benefits from share-based compensation	26	145	20
Net cash used in financing activities	(339,839)	(114,765)	(309,035)
Net increase in cash and cash equivalents	67,203	245,227	213,797
Cash and cash equivalents at beginning of the year	1,210,977	965,750	751,953
Cash and cash equivalents at end of the year	$ 1,278,180	$ 1,210,977	$ 965,750

The Company and its Significant Accounting Policies

12 Months Ended

Jan. 30, 2016

The Company and its Significant Accounting Policies

Note 1 — The Company and its Significant Accounting Policies

The Company

Marvell Technology Group Ltd., a Bermuda company, and its subsidiaries (the “Company”), is a fabless semiconductor provider of high-performance application-specific standard products. The Company’s core strength of expertise is the development of complex System-on-a-Chip and System-in-a-Package devices, leveraging its extensive technology portfolio of intellectual property in the areas of analog, mixed-signal, digital signal processing, and embedded and stand-alone integrated circuits. The majority of the Company’s product portfolio leverages embedded central processing unit technology. The Company also develops platforms that it defines as integrated hardware along with software that incorporates digital computing technologies designed and configured to provide an optimized computing solution. The Company’s broad product portfolio includes devices for data storage, enterprise-class Ethernet data switching, Ethernet physical-layer transceivers, wireless connectivity, Internet-of-Things devices and multimedia solutions.

Basis of Presentation

The Company’s fiscal year is the 52- or 53-week period ending on the Saturday closest to January 31. In a 52-week year, each fiscal quarter consists of 13 weeks. The additional week in a 53-week year is added to the fourth quarter, making such quarter consist of 14 weeks. Fiscal 2016, 2015 and 2014 each had a 52-week period.

Use of Estimates

The preparation of consolidated financial statements in conformity with generally accepted accounting principles in the United States (“GAAP”) requires management to make estimates, judgments and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses, and related disclosure of contingent assets and liabilities. On an ongoing basis, the Company evaluates its estimates, including those related to performance-based compensation, revenue recognition, provisions for sales returns and allowances, inventory excess and obsolescence, investment fair values, goodwill and other intangible assets, restructuring, income taxes, litigation and other contingencies. In addition, the Company uses assumptions when employing the Monte Carlo simulation and Black-Scholes valuation models to calculate the fair value of share-based awards that are granted. Actual results could differ from these estimates, and such differences could affect the results of operations reported in future periods.

Principles of Consolidation

The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All intercompany accounts and transactions have been eliminated. The functional currency of the Company and its subsidiaries is the U.S. dollar.

Cash and Cash Equivalents

The Company considers all highly liquid investments with a maturity of three months or less from the date of purchase to be cash equivalents. Cash and cash equivalents consist of cash on deposit with banks, time deposits, U.S. government and agency debt, municipal debt securities, corporate debt securities and money market funds.

Investments

The Company’s marketable investments are classified as available-for-sale and are reported at fair value. The Company determines any realized gains or losses on the sale of available-for-sale securities on a specific identification method, and such gains and losses are recorded as a component of interest and other income, net. Unrealized gains and losses of the available-for-sale securities are excluded from earnings and reported as a component of accumulated other comprehensive income. The Company performs a periodic review of its available-for-sale securities to determine whether an other-than-temporary impairment has occurred. Generally, for an individual security that has been in an unrealized loss position for an extended period of time, the Company evaluates whether an impairment charge should be recognized. Its evaluation is based on specific facts and circumstances at the time of assessment, including general market conditions, and the duration and extent to which the fair value is below cost. If the fair value of a debt security is less than its amortized cost, then an other-than-temporary impairment for the difference is recognized if:

•

the Company has the intent to sell the security;

•

it is more likely than not that the Company will be required to sell the security before recovery of its amortized cost base; or

•

a credit loss exists insofar as the Company does not expect to recover the entire recognized amortized cost of the security.

In general, investments with original maturities of greater than 90 days and remaining maturities of less than one year are classified as short-term investments. Investments with maturities beyond one year may also be classified as short-term based on their highly liquid nature and can be sold to fund for current operations.

The Company also has equity investments in privately-held companies. If the Company has the ability to exercise significant influence over the investee, but not control, or if the investee is a partnership type investment, the Company accounts for the investments under the equity method. If the Company does not have the ability to exercise significant influence over the operations of the investee, the Company accounts for the investment under the cost method. Investments in privately-held companies are included in other non-current assets.

Impairment of Investments

If a debt security’s market value is below amortized cost and the Company either intends to sell the security or it is more likely than not that the Company will be required to sell the security before its anticipated recovery, the Company records an other-than-temporary impairment charge to interest and other income, net in the consolidated statements of operations.

Investments in privately-held companies are subject to a periodic impairment review. Investments are considered impaired when the fair value is below the investment’s cost basis and the decline in value is judged to be other-than-temporary. This assessment is based on a qualitative and quantitative analysis, including, but not limited to, the investee’s revenue and earnings trends, available cash and liquidity, and the status of the investee’s products and the related market for such products.

Derivative Financial Instruments

The Company accounts for its derivative instruments as either assets or liabilities and carries them at fair value. For derivative instruments that hedge the exposure to variability in expected future cash flows and are designated as cash flow hedges, the effective portion of the gain or loss on the derivative instrument is reported as a component of accumulated other comprehensive income in the consolidated statements of shareholders’ equity and reclassified into earnings in the same period or periods during which the hedged transaction affects earnings. The ineffective portion of the gain or loss on the derivative instrument is recognized in current earnings. To receive hedge accounting treatment, cash flow hedges must be highly effective in offsetting changes to expected future cash flows on hedged transactions. Derivatives that are not designated as hedges must be adjusted to fair value through earnings.

Concentration of Credit Risk and Significant Customers

Financial instruments that potentially subject the Company to a significant concentration of credit risk consist principally of cash equivalents, short-term investments and accounts receivable. Cash, cash equivalents and short-term investments balances are maintained with high-quality financial institutions, the composition and maturities of which are regularly monitored by management. The Company believes that the concentration of credit risk in its trade receivables, which consists of a customer base located primarily in the Asia Pacific Region, is substantially mitigated by the Company’s credit evaluation process, relatively short collection terms and the high level of credit worthiness of its customers. The Company performs ongoing credit evaluations of its customers’ financial conditions and limits the amount of credit extended when deemed necessary based upon payment history and the customer’s current credit worthiness, but generally requires no collateral. The Company regularly reviews the allowance for bad debt and doubtful accounts by considering factors such as historical experience, credit quality, age of the accounts receivable balances and current economic conditions that may affect a customer’s ability to pay.

The Company’s accounts receivable was concentrated with two customers at January 30, 2016, who represented 13% and 11% of gross accounts receivable, respectively, compared with two customers at January 31, 2015, who represented 15% and 14% of gross accounts receivable, respectively.

Historically, a relatively small number of customers have accounted for a significant portion of the Company’s net revenue. Net revenue from one customer was 18%, 20% and 24% for fiscal 2016, 2015 and 2014, respectively. Net revenue from a second customer was 13% in each of fiscal 2016 and 2015, and 12% in fiscal 2014.

The Company also had net revenue from one distributor representing 11% for fiscal 2015. No distributors accounted for 10% or greater of total net revenue in either fiscal 2016 or fiscal 2014. The Company continuously monitors the creditworthiness of its distributors and believes these distributors’ sales to diverse end customers and to diverse geographies further serve to mitigate the Company’s exposure to credit risk.

Inventories

Inventory is stated at the lower of cost or market, cost being determined under the first-in, first-out method. The total carrying value of the Company’s inventory is reduced for any difference between cost and estimated market value of inventory that is determined to be excess, obsolete or unsellable inventory based upon assumptions about future demand and market conditions. If actual future demand for the Company’s products is less than currently forecasted, the Company may be required to write inventory down below the current carrying value. Once the carrying value of inventory is reduced, it is maintained until the product to which it relates to is sold or otherwise disposed of. Inventoriable shipping and handling costs are classified as a component of cost of goods sold in the consolidated statements of operations.

Property and Equipment, Net

Property and equipment, net, are stated at cost less accumulated depreciation. Depreciation is computed using the straight-line method over the estimated useful lives of the assets, which ranges from 3 to 7 years for machinery and equipment, and 3 to 4 years for computer software, and furniture and fixtures. Buildings are depreciated over an estimated useful life of 30 years and building improvements are depreciated over estimated useful lives of 15 years. Leasehold improvements are depreciated over the shorter of the remaining lease term or the estimated useful life of the asset.

Goodwill

Goodwill is recorded when the consideration paid for a business acquisition exceeds the fair value of net tangible and intangible assets acquired. Goodwill is measured and tested for impairment annually on the last business day of the fiscal fourth quarter and whenever events or changes in circumstances indicate the carrying amount of goodwill may not be recoverable. The Company first assesses qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount.

If the Company concludes that it is more likely than not that the fair value of a reporting unit is less than its carrying amount or if the Company notes multiple qualitative factors indicating potential impairment, then a two-step quantitative impairment test is performed. The first step requires comparing the fair value of the reporting unit to its net book value, including goodwill. The Company has identified that its business operates as a single operating segment with two components (Storage, and Smart Networked Devices and Solutions), which it has concluded can be aggregated into a single reporting unit for purposes of testing goodwill impairment. A potential impairment exists if the fair value of the reporting unit is lower than its net book value. The second step of the process is only performed if a potential impairment exists, and it involves determining the implied fair value of the reporting unit’s goodwill and comparing it to the carrying value of goodwill. If the carrying value of goodwill were to exceed its implied fair value, then the Company would record an impairment loss for the difference in the fiscal quarter in which the determination is made.

Long-Lived Assets and Intangible Assets

The Company assesses the impairment of long-lived assets and intangible assets whenever events or changes in circumstances indicate that the carrying amount of long-lived assets may not be recoverable. The Company estimates the future cash flows, undiscounted and without interest charges, expected to be generated by the assets from its use or eventual disposition. If the sum of the expected undiscounted future cash flows is less than the carrying amount of those assets, the Company recognizes an impairment loss based on the excess of the carrying amount over the fair value of the assets. Please see “Note 7 — Goodwill and Acquired Intangible Assets, Net” for further details regarding impairment of acquisition-related identified intangible assets.

Acquisition-related identified intangible assets are amortized on a straight-line basis over their estimated economic lives. In-process research and development (“IPR&D”) is not amortized until the completion of the related development.

Foreign Currency Transactions

The functional currency of all of the Company’s non-U.S. operations is the U.S. dollar. Monetary accounts maintained in currencies other than the U.S. dollar are re-measured using the foreign exchange rate at the balance sheet date. Operational accounts and nonmonetary balance sheet accounts are measured and recorded at the rate in effect at the date of the transaction. The effects of foreign currency re-measurement are reported in current operations.

Revenue Recognition

The Company recognizes revenue when there is persuasive evidence of an arrangement, delivery has occurred, the fee is fixed or determinable, and collection is reasonably assured.

Product revenue is generally recognized upon shipment of product to customers, net of accruals for estimated sales returns and rebates. However, some of the Company’s sales are made through distributors under agreements allowing for price protection and limited rights of stock rotation on products unsold by the distributors. Although title passes to the distributor upon shipment terms and payment by the Company’s distributors is not contingent on resale of the product, product revenue on sales made through distributors with price protection and stock rotation rights are deferred until the distributors sell the product to end customers. Deferred revenue less the related cost of the inventories is reported as deferred income. The Company does not believe that there is any significant exposure related to impairment of deferred cost of sales, as its historical returns have been minimal and inventory turnover for its distributors generally ranges from 60 to 90 days. The Company’s sales to direct customers are made primarily pursuant to standard purchase orders for delivery of products.

A portion of the Company’s net revenue is derived from sales through third-party logistics providers, who maintain warehouses in close proximity to the customer’s facilities. Revenue from sales through these third-party logistics providers is not recognized until the product is pulled from stock by the end customer.

The provision for estimated sales returns on product sales is recorded in the same period the related revenues are recorded. These estimates are based on historical returns, analysis of credit memo data and other known factors. Actual returns could differ from these estimates. The Company accounts for rebates by recording reductions to revenue for rebates in the same period that the related revenue is recorded. The amount of these reductions is based upon the terms agreed to with the customer.

Advertising Expense

Advertising costs are expensed as incurred. The Company recorded $5.1 million, $5.6 million and $0.3 million of advertising costs for fiscal 2016, 2015 and 2014, respectively, included in selling and marketing expenses in the consolidated statement of operations.

Share-Based Compensation

Share-based compensation is measured at the grant date, based on the fair value of the award, and is recognized as expense over the requisite service period. The Company amortizes share-based compensation expense for time-based awards under the straight-line attribution method over the vesting period, which is generally four years for annual grants to employees and five years for new hire grants. Share-based compensation expense for performance-based awards is recognized when it becomes probable that the performance conditions will be met. Once it becomes probable that a performance-based award will vest, the Company recognizes compensation expense equal to the number of shares expected to vest multiplied by the fair value of the award at the grant date, which is amortized using the accelerated method. For stock purchase rights under the stock purchase plan, the Company amortizes share-based compensation expense ratably over the two-year offering period.

The Company estimates the fair value of time-based stock option and stock purchase awards on the date of grant using the Black Scholes option-pricing model. The fair value of market-based stock option awards is estimated on the date of grant using a Monte Carlo simulation model. The value of the portion of the awards that is ultimately expected to vest is recognized as expense over the requisite service periods. The Black Scholes and Monte Carlo models incorporate various highly subjective assumptions including expected term of awards, expected future stock price volatility, expected dividend yield and risk-free interest rate.

In developing estimates used to calculate assumptions, the Company establishes the expected term for employee stock options, as well as expected forfeiture rates, based on the historical settlement experience and after giving consideration to vesting schedules. Assumptions for stock option exercises and pre-vesting terminations of stock options are stratified by two employee groups and one employee/non-employee group with sufficiently distinct behavior patterns. Expected volatility was developed based on equally weighted combination of historical stock price volatility and implied volatility derived from traded options on the Company’s stock in the marketplace. The expected dividend yield is calculated by dividing annualized dividend payments by the closing stock price on the grant date of the option.

Forfeitures are estimated at the time of grant and revised, if necessary, in subsequent periods if actual forfeitures differ from initial estimates. Share-based compensation expense for time-based and performance-based awards is recorded net of estimated forfeitures such that expense is recorded only for those share-based awards that are expected to vest. Previously recognized expense is reversed for the portion of awards forfeited prior to vesting as and when forfeitures occurred.

The fair value of each restricted stock unit is estimated based on the market price of the Company’s common shares on the date of grant less the expected dividend yield.

Comprehensive Income (Loss)

Comprehensive income (loss) is comprised of net income and unrealized gains and losses, net of tax, on available-for-sale securities, auction rate securities and cash flow hedges. Accumulated other comprehensive income (loss), as presented on the accompanying consolidated balance sheets, consists of net unrealized gains and losses on available-for-sale securities, auction rate securities and cash flow hedges, net of tax.

Accounting for Income Taxes

The Company recognizes income taxes using an asset and liability approach. This approach requires the recognition of taxes payable or refundable for the current year, and deferred tax liabilities and assets for the future tax consequences of events that have been recognized in the Company’s consolidated financial statements or tax returns. The measurement of current and deferred taxes is based on provisions of the enacted tax law and the effects of future changes in tax laws or rates are not anticipated.

Using available evidence and judgment, the Company establishes a valuation allowance for deferred tax assets, when it is determined that it is more likely than not that they will not be realized. Valuation allowances have been provided primarily against the U.S. research and development credits. Valuation allowances have also been provided against certain acquired operating losses, and the deferred tax assets of a foreign subsidiary. A change in the assessment of the realization of deferred tax assets may materially impact the Company’s tax provision in the period in which a change of assessment occurs.

The Company is subject to income tax audits by the respective tax authorities in each jurisdiction in which the Company operates. The Company recognizes the effect of income tax positions only if these positions are more likely than not of being sustained. Recognized income tax positions are measured at the largest amount that is more than 50% likely of being realized. Changes in recognition or measurement are reflected in the period in which the change in judgment occurs. The Company records interest and penalties related to unrecognized tax benefits in income tax expense.

Warranty

The Company’s products are generally subject to warranty, which provides for the estimated future costs of repair or replacement upon shipment of the product. The Company’s products carry a standard 90-day warranty, with certain exceptions in which the warranty period can extend to more than one year based on contractual agreements. The warranty accrual is primarily estimated based on historical claims compared to historical revenues and assumes that the Company will have to replace products subject to a claim. From time to time, the Company becomes aware of specific warranty situations, and it records specific accruals to cover these exposures. Warranty expenses were not material in fiscal 2016, 2015 and 2014.

Recent Accounting Pronouncements

Accounting Pronouncements Recently Adopted

In April 2014, the Financial Accounting Standards Board (“FASB”) issued an amendment to its guidance regarding the reporting requirements of discontinued operations, which was effective for the Company beginning in the first quarter of fiscal 2016. Under the amended guidance, a discontinued operation is defined as a disposal of a component or group of components that is disposed of or is classified as held for sale and represents a strategic shift that has (or will have) a major effect on an entity’s operations and financial results. As a result, the Company has adopted and will apply the new guidance for any future dispositions that meet the criteria of a discontinued operation under the amendment.

In November 2015, the FASB issued a new standard to simplify the presentation of deferred income taxes. Previous guidance required deferred tax assets and liabilities to be separately presented as current and non-current amounts on the consolidated balance sheet. The new standard will require that deferred tax assets and liabilities be classified and presented on the consolidated balance sheet as non-current. The guidance is effective for annual and interim reporting periods beginning after December 15, 2016, and may be applied either prospectively or retrospectively, although early adoption is permitted. The Company early adopted the new guidance at the beginning of its fourth quarter of fiscal 2016 and accordingly, it has classified all deferred tax assets and liabilities, together with the corresponding valuation allowance, as noncurrent on the consolidated balance sheet. The Company has applied this standard prospectively and did not retrospectively adjust any prior periods. Adoption had no impact on the Company’s consolidated results of operations and it had no material impact on working capital.

Accounting Pronouncements Not Yet Effective

In May 2014, the FASB issued a new standard on the recognition of revenue from contracts with customers, which will supersede nearly all existing revenue recognition guidance under GAAP. Under the new standard, recognition of revenue occurs when a customer obtains control of promised goods or services in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. Additional disclosures regarding the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers, and assets recognized from costs incurred to obtain or fulfill a contract will also be required. The FASB subsequently issued an update to this standard in August 2015, which provides deferral of the effective date by one year. The standard is now effective for the Company’s first quarter of fiscal 2019 and allows for either full retrospective or modified retrospective adoption. Early adoption is permitted only as of annual reporting periods beginning after December 15, 2016 and including interim reporting periods within such reporting period.

The FASB has since issued additional updates of its new standard on revenue recognition issued in May 2014. In March 2016, an amendment was issued to clarify the implementation guidance on principal versus agent consideration. The guidance requires entities to determine whether the nature of its promise to provide goods or services to a customer is performed in a principal or agent capacity and to recognize revenue in a gross or net manner based on its principal/agent designation. In April 2016, amendments were issued to clarify the identification of performance obligations and the licensing implementation guidance in the initial standard. Amendments were issued in May 2016 related to its guidance on assessing collectability, presentation of sales tax, noncash consideration, and completed contracts and contract modification at transition, which reduce the potential for diversity in practice, and the cost and complexity of application at transition and on an ongoing basis. The Company has been evaluating the effects of the new guidance and has not yet selected a transition method nor has it determined the potential effects of adoption on its consolidated financial statements.

In April 2015, the FASB issued new guidance to help entities evaluate the accounting for fees paid by a customer in a cloud computing arrangement. The guidance provides a basis for evaluating whether a cloud computing arrangement includes a software license or whether the arrangement should be accounted for as a service contract. The guidance is effective for annual and interim reporting periods beginning after December 15, 2015. The newly issued guidance also strikes from previous authoritative guidance, the use by analogy to the accounting for capital leases, which the Company applied in the accounting for certain of its technology license agreements. The Company is currently evaluating the effect this new guidance will have on its consolidated financial statements.

In July 2015, the FASB issued an amendment to its guidance regarding the subsequent measurement of inventory. Currently, inventory is measured at the lower of cost or market. Market could be replacement cost, net realizable value or net realizable value less an approximately normal profit margin. Under this amended guidance, inventory is to be measured at the lower of cost and net realizable value. Net realizable value is the estimated selling prices in the ordinary course of business, less reasonably predictable costs of completion, disposal and transportation. This amendment applies to inventories for which cost is determined by methods other than last-in first-out and the retail inventory method. This standard is effective for annual and interim reporting periods beginning after December 15, 2016. The Company is currently evaluating the effect this new guidance will have on its consolidated financial statements.

In January 2016, the FASB issued new guidance which requires entities to measure all investments in equity securities at fair value with changes recognized through net income. This requirement does not apply to investments that qualify for the equity method of accounting, investments that result in consolidation of the investee, or investments for which the entity meets a practicability exception to fair value measurement. The new guidance also changes certain disclosure requirements for financial instruments. This standard is effective for annual and interim reporting periods beginning after December 15, 2017. The Company is currently evaluating the effect this new guidance will have on its consolidated financial statements.

In March 2016, the FASB issued an amendment to its guidance on the effects of derivative contract novations on existing hedge accounting relationships. The new guidance clarifies that a change in the counterparty to a designated hedging instrument, in and of itself, does not require the de-designation of that hedging relationship, provided that all other hedge accounting criteria continue to be met. The guidance is effective for annual and interim reporting periods beginning after December 15, 2016. The Company is currently evaluating the effect this new guidance will have on its consolidated financial statements.

In March 2016, the FASB issued a new standard on the accounting for leases, which requires a lessee to record a right-of-use asset and a corresponding lease liability on the balance sheet for all leases with terms longer than twelve months. The standard also expands the required quantitative and qualitative disclosures surrounding lease arrangements. The standard is effective for annual and interim reporting periods beginning after December 15, 2018. The Company is currently evaluating the effect this new guidance will have on its consolidated financial statements.

In March 2016, the FASB issued an amendment to its guidance for investments that eliminates the requirement to retrospectively apply the equity method in previous periods when an investor initially obtains significant influence over an investee. Under the amended guidance, the investor should apply the equity method prospectively from the date the investment qualifies for the equity method. The guidance is effective for annual and interim reporting periods beginning after December 15, 2016. The Company is currently evaluating the effect this new guidance will have on its consolidated financial statements.

In March 2016, the FASB issued new guidance which simplifies several aspects of the accounting for share-based payment award transactions, including the accounting for income taxes, forfeitures and statutory tax withholding requirements, as well as classification in the statement of cash flows. The guidance is effective for annual and interim reporting periods beginning after December 15, 2016. The Company is currently evaluating the effect this new guidance will have on its consolidated financial statements.

In June 2016, the FASB issued a new standard requiring financial assets measured at amortized cost be presented at the net amount expected to be collected, through an allowance for credit losses that is deducted from the amortized cost basis. The standard eliminates the probable initial recognition in current GAAP and reflects an entity’s current estimate of all expected credit losses. The measurement of expected credit losses is based upon historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the financial assets. The standard is effective for annual and interim reporting periods beginning after December 15, 2019. The Company is currently evaluating the effect this new guidance will have on its consolidated financial statements

Divestiture

12 Months Ended

Jan. 30, 2016

Divestiture

Note 2 — Divestiture

The Company had no divestitures in fiscal 2016 and 2015.

During fiscal 2014, the Company exited one of its businesses and sold certain assets to an unrelated third party as part of cost reduction efforts related to restructuring actions in fiscal 2014 (see “Note 8 — Restructuring and Other Related Charges” for further information). The transaction primarily included the sale of intellectual property and equipment with a carrying value of $0.1 million. The Company also wrote off $2.6 million of goodwill allocated to the business based on the relative fair values of the business and the Company’s remaining reporting unit. The buyer also hired the former employees of the business. As part of the transaction, the Company received a license to the intellectual property it sold. It also entered into a separate support services agreement with the buyer to cover an 18-month period. As a result of the sale of this business, the Company recorded a gain of $7.0 million, which is included in interest and other income, net, in the consolidated statement of operations.

- Definition

The entire disclosure for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. The disclosure may include leverage buyout transactions (as applicable).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1497-128463

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1490-128463

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1392-128463

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e7008-128479

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1486-128463

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=56956791&loc=d3e4845-128472

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1500-128463

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1524-128463

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e7000-128479

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=56956791&loc=d3e4922-128472

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=56956791&loc=d3e4934-128472

Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=56956791&loc=d3e4926-128472

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1383-128463

Reference 15: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6996-128479

+ Details

Investments

12 Months Ended

Jan. 30, 2016

Investments

Note 3 — Investments

The following tables summarize the Company’s investments (in thousands):


	January 30, 2016
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Short-term investments:
Available-for-sale:
Corporate debt securities	$	558,337	$	766	$	(1,282	)	$	557,821
U.S. government and agency debt		317,595		64		(254	)		317,405
Asset backed securities		76,711		81		(56	)		76,736
Foreign government and agency debt		21,370		2		(14	)		21,358
Municipal debt securities		31,211		45		(7	)		31,249

Total short-term investments		1,005,224		958		(1,613	)		1,004,569
Long-term investments:
Available-for-sale:
Auction rate securities		11,296		—		—			11,296

Total long-term investments		11,296		—		—			11,296

Total investments	$	1,016,520	$	958	$	(1,613	)	$	1,015,865


	January 31, 2015
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Short-term investments:
Available-for-sale:
Corporate debt securities	$	983,008	$	3,872	$	(563	)	$	986,317
U.S. government and agency debt		178,898		265		(7	)		179,156
Asset backed securities		91,432		108		(9	)		91,531
Foreign government and agency debt		28,051		61		(2	)		28,110
Municipal debt securities		33,421		47		(4	)		33,464

Total short-term investments		1,314,810		4,353		(585	)		1,318,578
Long-term investments:
Available-for-sale:
Auction rate securities		12,500		—		(2,274	)		10,226

Total long-term investments		12,500		—		(2,274	)		10,226

Total investments	$	1,327,310	$	4,353	$	(2,859	)	$	1,328,804

As of January 30, 2016, the Company’s investment portfolio included auction rate securities with an aggregate par value of $12.5 million. Although these auction rate securities have continued to pay interest and the underlying collateral has not deteriorated, there is currently limited trading volume in the securities. The Company uses a discounted cash flow model to estimate the fair value of the auction rate securities based on its estimated timing and amount of future interest and principal payments. In developing the discounted cash flow model, the Company considers the credit quality and liquidity of the underlying securities and related issuer, the collateralization of underlying security investments and other considerations. The fair value of the auction rate securities as of January 30, 2016 was $1.2 million less than the par value and is included in long-term investments.

In January 2016, the Company determined these auction rate securities would more likely than not be sold as part of a general requirement to raise liquidity. Based upon the shortened time horizon for holding these auction rate securities and the continuation of an illiquid market, the Company does not expect to recover the par value of the securities and considers the impairment of these auction rate securities to be other-than-temporary. As a result, an impairment loss of $1.2 million was recorded in interest and other income, net, in the consolidated statements of operations.

Gross realized gains and gross realized losses on sales of available-for-sale securities are presented in the following table (in thousands):


	Year Ended
	January 30, 2016			January 31, 2015			February 1, 2014
Gross realized gains	$	1,654		$	1,618		$	1,567
Gross realized losses		(1,923	)		(169	)		(268	)
Impairment loss		(1,204	)		—			—

Total net realized gains (losses)	$	(1,473	)	$	1,449		$	1,299

The contractual maturities of available-for-sale securities are presented in the following table (in thousands):


	January 30, 2016				January 31, 2015
	Amortized Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value
Due in one year or less	$	304,117	$	304,035	$	361,108	$	361,396
Due between one and five years		689,847		689,279		950,702		954,151
Due over five years		22,556		22,551		15,500		13,257

	$	1,016,520	$	1,015,865	$	1,327,310	$	1,328,804

For individual securities that have been in a continuous unrealized loss position, the fair value and gross unrealized loss for these securities aggregated by investment category and length of time in an unrealized position are presented in the following tables (in thousands):


	January 30, 2016
	Less than 12 months					12 months or more					Total
	Fair Value		Unrealized Loss			Fair Value		Unrealized Loss			Fair Value		Unrealized Loss
Corporate debt securities	$	283,138	$	(1,237	)	$	14,383	$	(45	)	$	297,521	$	(1,282	)
U.S. government and agency debt		263,325		(254	)		—		—			263,325		(254	)
Asset backed securities		46,646		(56	)		—		—			46,646		(56	)
Foreign government and agency debt		16,458		(14	)		—		—			16,458		(14	)
Municipal debt securities		2,943		(5	)		1,571		(2	)		4,514		(7	)

Total securities	$	612,510	$	(1,566	)	$	15,954	$	(47	)	$	628,464	$	(1,613	)


	January 31, 2015
	Less than 12 months					12 months or more					Total
	Fair Value		Unrealized Loss			Fair Value		Unrealized Loss			Fair Value		Unrealized Loss
Corporate debt securities	$	243,699	$	(558	)	$	2,005	$	(5	)	$	245,704	$	(563	)
U.S. government and agency debt		32,165		(7	)		—		—			32,165		(7	)
Asset backed securities		25,053		(9	)		—		—			25,053		(9	)
Foreign government and agency debt		2,999		(2	)		—		—			2,999		(2	)
Municipal debt securities		2,845		(4	)		—		—			2,845		(4	)
Auction rate securities		—		—			10,226		(2,274	)		10,226		(2,274	)

Total securities	$	306,761	$	(580	)	$	12,231	$	(2,279	)	$	318,992	$	(2,859	)

Supplemental Financial Information

12 Months Ended

Jan. 30, 2016

Supplemental Financial Information

Note 4 — Supplemental Financial Information (in thousands)

Consolidated Balance Sheets


	January 30, 2016		January 31, 2015
Cash and cash equivalents:
Cash	$	669,312	$	864,680
Cash equivalents:
Time deposits		209,405		213,012
U.S. government and agency debt		184,374		—
Corporate debt securities		54,689		21,999
Money market funds		160,400		111,286

Cash and cash equivalents	$	1,278,180	$	1,210,977


	January 30, 2016		January 31, 2015
Provision for sales returns and allowances:
Sales returns	$	1,873	$	899
Doubtful accounts		889		1,213

	$	2,762	$	2,112


	January 30, 2016		January 31, 2015
Inventories:
Work-in-process	$	131,471	$	183,869
Finished goods		78,546		124,293

Inventories	$	210,017	$	308,162


	January 30, 2016			January 31, 2015
Property and equipment, net:
Machinery and equipment	$	578,627		$	601,961
Buildings		144,320			144,320
Computer software		102,928			99,312
Land		53,373			53,373
Building improvements		49,927			49,753
Leasehold improvements		50,192			51,434
Furniture and fixtures		27,119			27,883
Construction in progress		1,353			6,167

		1,007,839			1,034,203
Less: Accumulated depreciation		(708,299	)		(693,564	)

Property and equipment, net	$	299,540		$	340,639

The Company recorded depreciation expense of $73.8 million, $78.3 million and $77.2 million for fiscal 2016, 2015 and 2014, respectively.


	January 30, 2016		January 31, 2015
Other non-current assets:
Technology and other licenses	$	48,770	$	61,217
Deferred tax assets		34,505		22,273
Investments in privately-held companies		5,804		9,267
Prepaid land use rights		13,123		13,432
Deposits		51,512		7,903
Other		10,996		14,747

Other non-current assets	$	164,710	$	128,839

Amortization of technology and other licenses was $26.4 million, $27.9 million and $25.6 million in fiscal 2016, 2015 and 2014, respectively. During fiscal 2016 and fiscal 2014, the Company recorded a charge of $3.5 and $1.5 million, respectively, to write down investments in privately-held companies that were considered to be impaired. There were no such charges recorded in fiscal 2015.


	January 30, 2016		January 31, 2015
Accrued liabilities:
Accrued rebates	$	41,320	$	39,105
Accrued royalties		16,217		24,680
Technology license obligations		17,985		14,428
Accrued legal expense		9,761		8,327
Accrued litigation		3,830		1,700
Other		42,947		43,148

Accrued liabilities	$	132,060	$	131,388


	January 30, 2016			January 31, 2015
Deferred income:
Net deferred revenue	$	77,935		$	98,444
Deferred cost of goods sold		(22,213	)		(30,324	)

Deferred income	$	55,722		$	68,120


	January 30, 2016		January 31, 2015
Other non-current liabilities:
Technology license obligations	$	12,461	$	16,468
Long-term accrued employee compensation		6,078		4,610
Other		8,424		11,115

Other non-current liabilities	$	26,963	$	32,193

Accumulated other comprehensive income (loss):

The changes in accumulated other comprehensive income (loss) by components are presented in the following tables (in thousands):


	Unrealized Gain (Loss) on Marketable Securities			Unrealized Gain (Loss) on Auction Rate Securities			Unrealized Gain (Loss) on Cash Flow Hedges			Total
Balance at February 1, 2014	$	2,534		$	(2,871	)	$	934		$	597
Other comprehensive income (loss) before reclassifications		2,479			85			(2,338	)		226
Amounts reclassified from accumulated other comprehensive income		(1,245	)		512			218			(515	)

Net current-period other comprehensive income (loss), net of tax		1,234			597			(2,120	)		(289	)

Balance at January 31, 2015		3,768			(2,274	)		(1,186	)		308
Other comprehensive income (loss) before reclassifications		(3,838	)		—			1,111			(2,727	)
Amounts reclassified from accumulated other comprehensive income		(586	)		2,274			(64	)		1,624

Net current-period other comprehensive income (loss), net of tax		(4,424	)		2,274			1,047			(1,103	)

Balance at January 30, 2016	$	(656	)	$	—		$	(139	)	$	(795	)

The amounts reclassified from accumulated other comprehensive income (loss) by components are presented in the following table (in thousands):


	Year Ended
Affected Line Item in the Statement of Operations	January 30, 2016			January 31, 2015			February 1, 2014
Interest and other income, net:
Available-for-sale securities:
Marketable securities	$	586		$	1,245		$	1,139
Auction rate securities		(2,274	)		(512	)		—
Operating costs and expenses:
Cash flow hedges:
Research and development		48			(198	)		3,329
Selling and marketing		(1	)		(8	)		266
General and administrative		17			(12	)		24

Total	$	(1,624	)	$	515		$	4,758

Consolidated Statements of Operations


	Year Ended
	January 30, 2016			January 31, 2015			February 1, 2014
Interest and other income, net:
Interest income	$	15,982		$	11,370		$	9,379
Net realized gain (loss) on investments		(1,473	)		1,449			1,299
Currency translation gain		6,655			1,871			8,739
Other income (loss)		(2,773	)		9,811			8,025
Interest expense		(706	)		(1,167	)		(1,876	)

	$	17,685		$	23,334		$	25,566

Consolidated Statements of Cash Flows


	Year Ended
	January 30, 2016		January 31, 2015		February 1, 2014
Supplemental cash flow information:
Cash paid for interest	$	703	$	1,167	$	1,873

Cash paid for income taxes, net	$	13,363	$	15,727	$	9,385

Non-Cash Investing and Financing Activities:
Unsettled trades of available-for-sale securities	$	53,749	$	—	$	—

Purchase of intellectual property under license obligations	$	13,800	$	—	$	8,900

Unpaid purchase of property and equipment at end of year	$	9,069	$	7,083	$	7,285

Net income (loss) per share

The Company reports both basic net income (loss) per share, which is based on the weighted average number of common shares outstanding during the period, and diluted net income (loss) per share, which is based on the weighted average number of common shares outstanding and potentially dilutive shares outstanding during the period. The computations of basic and diluted net income (loss) per share are presented in the following table (in thousands, except per share amounts):


	Year Ended
	January 30, 2016			January 31, 2015		February 1, 2014
Numerator:
Net income (loss)	$	(811,400	)	$	435,346	$	315,320

Denominator:
Weighted average shares — basic		510,945			511,089		496,518
Effect of dilutive securities:
Share-based awards		—			9,671		7,895

Weighted average shares — diluted		510,945			520,760		504,413

Net income (loss) per share:
Basic	$	(1.59	)	$	0.85	$	0.64
Diluted	$	(1.59	)	$	0.84	$	0.63

Potential dilutive securities include dilutive common shares from share-based awards attributable to the assumed exercise of stock options, restricted stock units and employee stock purchase plan shares using the treasury stock method. Under the treasury stock method, potential common shares outstanding are not included in the computation of diluted net income per share, if their effect is anti-dilutive.

Anti-dilutive potential shares are presented in the following table (in thousands):

Year Ended

January 30,
2016

January 31,
2015

February 1,
2014

Weighted average shares outstanding:

Share-based awards

64,420

35,636

40,504

Anti-dilutive potential shares from share-based awards are excluded from the calculation of diluted earnings per share for the year ended January 30, 2016 due to the net loss reported in that period. Anti-dilutive potential shares from share-based awards are excluded from the calculation of diluted earnings per share for all other periods reported above because either their exercise price exceeded the average market price during the period or the share-based awards were determined to be anti-dilutive based on applying the treasury stock method.

Derivative Financial Instruments

12 Months Ended

Jan. 30, 2016

Derivative Financial Instruments

Note 5 — Derivative Financial Instruments

The Company manages some of its foreign currency exchange rate risk through the purchase of foreign currency exchange contracts that hedge against the short-term effect of currency fluctuations. The Company’s policy is to enter into foreign currency forward contracts with maturities less than 12 months that mitigate the effect of rate fluctuations on certain local currency denominated operating expenses. All derivative instruments are recorded at fair value in either prepaid expenses and other current assets or accrued liabilities. The Company reports cash flows from derivative instruments in cash flows from operating activities. The Company uses quoted prices to value its derivative instruments.

The notional amounts of outstanding forward contracts were as follows (in thousands):


	Buy Contracts
	January 30, 2016		January 31, 2015
Israeli shekel	$	19,082	$	51,326

Cash Flow Hedges. The Company designates and documents its foreign currency forward exchange contracts as cash flow hedges for certain operating expenses. The Company evaluates and calculates the effectiveness of each hedge at least quarterly. The effective change is recorded in accumulated other comprehensive income and is subsequently reclassified to operating expense when the hedged expense is recognized. Ineffectiveness is recorded in interest and other income, net.

Other Foreign Currency Forward Contracts. The Company may enter into foreign currency forward exchange contracts to hedge certain assets and liabilities denominated in various foreign currencies that it does not designate as hedges for accounting purposes. The maturities of these contracts are generally less than 12 months. Gains or losses arising from the remeasurement of these contracts to fair value each period are recorded in interest and other income, net.

The fair value of foreign currency exchange contracts was not significant as of any period presented.

The following table provides information about gains (losses) associated with our derivative financial instruments (in thousands):


	Location of Gains (Losses) in Statement of Operations	Amount of Gains (Losses) in Statement of Operations for the Year Ended
	Location of Gains (Losses) in Statement of Operations	January 30, 2016			January 31, 2015			February 1, 2014
Derivatives designated as cash flow hedges:
Forward contracts:	Research and development	$	(390	)	$	(1,930	)	$	3,099
	Selling and marketing		(5	)		(24	)		23
	General and administrative		(26	)		(157	)		246

		$	(421	)	$	(2,111	)	$	3,368

The portion of gains excluded from the assessment of hedge effectiveness are included in interest and other income, net, and these amounts were $0.1 million, $0.2 million and $0.5 million in fiscal 2016, 2015 and 2014, respectively. In addition, realized losses from forward contracts that are not designated as hedging instruments that are included in interest and other income, net, were not material in fiscal 2016, 2015 and 2014. The Company also reports hedge ineffectiveness from derivative financial instruments in current earnings, which were not material in fiscal 2016, 2015 and 2014. No cash flow hedges were terminated as a result of forecasted transactions that did not occur.

- Definition

The entire disclosure for derivative instruments and hedging activities including, but not limited to, risk management strategies, non-hedging derivative instruments, assets, liabilities, revenue and expenses, and methodologies and assumptions used in determining the amounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 30
-Section 45
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
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Reference 6: http://www.xbrl.org/2003/role/presentationRef
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
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Reference 8: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 10: http://www.xbrl.org/2003/role/presentationRef
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Reference 11: http://www.xbrl.org/2003/role/presentationRef
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Reference 12: http://www.xbrl.org/2003/role/presentationRef
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Reference 13: http://www.xbrl.org/2003/role/presentationRef
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Reference 14: http://www.xbrl.org/2003/role/presentationRef
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Reference 15: http://www.xbrl.org/2003/role/presentationRef
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Reference 16: http://www.xbrl.org/2003/role/presentationRef
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Reference 19: http://www.xbrl.org/2003/role/presentationRef
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+ Details

Fair Value Measurements

12 Months Ended

Jan. 30, 2016

Fair Value Measurements

Note 6 — Fair Value Measurements

Fair value is an exit price representing the amount that would be received in the sale of an asset or paid to transfer a liability in an orderly transaction between market participants. As such, fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or a liability. As a basis for considering such assumptions, the accounting guidance establishes a three-tier value hierarchy, which prioritizes the inputs used in the valuation methodologies in measuring fair value:

Level 1 — Observable inputs that reflect quoted prices for identical assets or liabilities in active markets.

Level 2 — Other inputs that are directly or indirectly observable in the marketplace.

Level 3 — Unobservable inputs that are supported by little or no market activity.

The fair value hierarchy also requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value.

The Company’s Level 1 assets include institutional money-market funds that are classified as cash equivalents and marketable investments in U.S. government and agency debt, which are valued primarily using quoted market prices. The Company’s Level 2 assets include its marketable investments in time deposits, corporate debt securities, foreign government and agency debt, municipal debt securities and asset back securities as the market inputs used to value these instruments consist of market yields, reported trades and broker/dealer quotes, which are corroborated with observable market data. In addition, foreign currency forward contracts and the severance pay fund are classified as Level 2 assets as the valuation inputs are based on quoted prices and market observable data of similar instruments. The Company’s investments in auction rate securities are classified as Level 3 assets because there are currently no active markets for the auction rate securities and consequently the Company is unable to obtain independent valuations from market sources. The auction rate securities are valued using a discounted cash flow model. Some of the inputs to the discounted cash flow model are unobservable in the market. The total amount of assets measured using Level 3 valuation methodologies represented 0.2% of total assets as of January 30, 2016.

The tables below set forth, by level, the Company’s financial assets and liabilities that were accounted for at fair value as of January 30, 2016 and January 31, 2015. The tables do not include assets and liabilities that are measured at historical cost or any basis other than fair value (in thousands):


	Fair Value Measurements at January 30, 2016
	Level 1		Level 2		Level 3		Total
Items measured at fair value on a recurring basis:
Assets
Cash equivalents:
Money market funds	$	160,400	$	—	$	—	$	160,400
Time deposits		—		209,405		—		209,405
U.S. government and agency debt		184,374		—		—		184,374
Corporate debt securities		—		54,689		—		54,689
Short-term investments:
U.S. government and agency debt		317,405		—		—		317,405
Corporate debt securities		—		557,821		—		557,821
Asset backed securities		—		76,736		—		76,736
Foreign government and agency debt		—		21,358		—		21,358
Municipal debt securities		—		31,249		—		31,249
Prepaid expenses and other current assets:
Foreign currency forward contracts		—		30		—		30
Long-term investments:
Auction rate securities		—		—		11,296		11,296
Other non-current assets:
Severance pay fund		—		678		—		678

Total assets	$	662,179	$	951,966	$	11,296	$	1,625,441

Liabilities
Accrued liabilities:
Foreign currency forward contracts	$	—	$	195	$	—	$	195


	Fair Value Measurements at January 31, 2015
	Level 1		Level 2		Level 3		Total
Items measured at fair value on a recurring basis:
Assets
Cash equivalents:
Money market funds	$	111,286	$	—	$	—	$	111,286
Time deposits		—		213,012		—		213,012
Corporate debt securities		—		21,999		—		21,999
Short-term investments:
U.S. government and agency debt		179,156		—		—		179,156
Corporate debt securities		—		986,317		—		986,317
Asset backed securities		—		91,531		—		91,531
Foreign government and agency debt		—		28,110		—		28,110
Municipal debt securities		—		33,464		—		33,464
Prepaid expenses and other current assets:
Foreign currency forward contracts		—		124		—		124
Long-term investments:
Auction rate securities		—		—		10,226		10,226
Other non-current assets:
Severance pay fund		—		1,758		—		1,758

Total assets	$	290,442	$	1,376,315	$	10,226	$	1,676,983

Liabilities
Accrued liabilities:
Foreign currency forward contracts	$	—	$	1,379	$	—	$	1,379

In connection with the early buyout option under an operating lease for corporate equipment in March 2015 (see “Note 8 — Restructuring and Other Charges”), the Company had an asset that it measured and recorded at fair value on a non-recurring basis. Such corporate equipment had a fair value of $9.3 million as of August 1, 2015, the end of the second quarter of fiscal 2016. The corporate equipment was sold in October 2015, prior to the end of the third quarter of fiscal 2016.

The following table summarizes the change in fair values for Level 3 assets for the years ended January 30, 2016 and January 31, 2015 (in thousands):


	Level 3
Changes in fair value during the year (pre-tax):
Balance at February 1, 2014	$	16,279
Sales, redemption and settlement		(3,650	)
Transfer out		(3,000	)
Unrealized gain included in accumulated other comprehensive income		597

Balance at January 31, 2015		10,226
Impairment loss		(1,204	)
Unrealized gain included in accumulated other comprehensive income		2,274

Balance at January 30, 2016	$	11,296

In November 2014, the Company received notification by the issuer of a mandatory full call of an auction rate security to be redeemed at par value and as a result, the security was classified within Level 2 based on the issuer’s quoted price. Subsequently, the auction rate security was fully redeemed at par value before the end of fiscal 2015.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Goodwill and Acquired Intangible Assets, Net

12 Months Ended

Jan. 30, 2016

Goodwill and Acquired Intangible Assets, Net

Note 7 — Goodwill and Acquired Intangible Assets, Net

Goodwill

There was no activity recorded to goodwill in fiscal 2016 and 2015 due to business combinations.

The Company has identified that its business operates as a single operating segment with two components that it has concluded can be aggregated into a single reporting unit for which it obtained an independent valuation to complete a step one assessment for goodwill impairment. In the third quarter of fiscal 2016, the Company performed an impairment assessment for testing goodwill due to certain events and circumstances management considered could be indicators of potential impairment, which included the U.S. Court of Appeals for the Federal Circuit (“Federal Circuit”) panel’s decision in August 2015 related to the CMU litigation (see “Note 10 —Commitments and Contingencies”), the Company’s decision to significantly restructure its mobile platform business announced in September 2015 (see “Note 8 — Restructuring and Other Related Charges”) and a significant decline in the Company’s stock price during fiscal 2016. As a result, the Company concluded there was no impairment of its goodwill. The Company’s annual test for goodwill impairment as of the last day of the fourth quarter of fiscal 2016, also did not result in any impairment charges since the excess of fair value over carrying amount for our reporting unit approximated 41% of its carrying amount.

Acquired Intangible Assets, Net

The carrying amounts of acquired intangible assets are as follows (in thousands):


			January 30, 2016							January 31, 2015
	Range of Useful Lives		Gross Carrying Amounts		Accumulated Amortization and Write-Offs			Net Carrying Amounts		Gross Carrying Amounts		Accumulated Amortization and Write-Offs			Net Carrying Amounts
Purchased and core technology		4 - 8 years	$	35,498	$	(21,910	)	$	13,588	$	36,348	$	(16,107	)	$	20,241
Trade names		5 years		—		—			—		1,300		(828	)		472
Customer intangibles		5 - 7 years		28,600		(24,178	)		4,422		28,600		(18,615	)		9,985

Total acquired intangible assets, net			$	64,098	$	(46,088	)	$	18,010	$	66,248	$	(35,550	)	$	30,698

Intangible assets, along with the related accumulated amortization, are removed from the table above at the end of the fiscal year they become fully amortized. In fiscal 2016, the Company recorded charges of $0.3 million to write off core technology due to its decision to discontinue the related development project and $0.3 million to write off a trade name that it no longer intends to market. The Company recorded charges of $3.4 million to write off IPR&D in fiscal 2015 upon the Company’s decision to discontinue the related project and $8.1 million in fiscal 2014 for the impairment of an acquired intangible asset. These impairment charges are included in amortization and write-off of acquired intangible assets in the consolidated statements of operations.

Based on the identified intangible assets recorded at January 30, 2016, the future amortization expense of identified intangibles excluding IPR&D for the next five fiscal years is as follows (in thousands):


Fiscal Year
2017	$	10,642
2018		5,508
2019		1,860
2020 and thereafter		—

	$	18,010

- Definition

The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss.

+ References + Details

Restructuring and Other Related Charges

12 Months Ended

Jan. 30, 2016

Restructuring and Other Related Charges

Note 8 — Restructuring and Other Related Charges

The following table provides a summary of restructuring and other related charges as presented in the Consolidated Statements of Operations (in thousands):


	Year Ended
	January 30, 2016		January 31, 2015		February 1, 2014
Cost of goods sold	$	10,292	$	—	$	—
Restructuring and other related charges		53,251		10,438		4,732
Write-off of acquired intangible assets		—		3,386		—

	$	63,543	$	13,824	$	4,732


	Year Ended
	January 30, 2016		January 31, 2015		February 1, 2014
Severance and related costs	$	43,926	$	5,181	$	2,786
Facilities and related costs		1,407		1,924		1,672
Loss on early contract termination		1,644		3,230		—
Other exit-related costs		534		86		213

		47,511		10,421		4,671
Impairment and write-off of assets:
Inventory		8,046		—		—
Technology licenses		1,250		—		—
Equipment and other		6,736		17		61
Acquired intangible asset		—		3,386		—

	$	63,543	$	13,824	$	4,732

Fiscal 2016. The Company recorded $63.5 million of restructuring and other related charges in fiscal 2016 as described in the following paragraphs.

In September 2015, the Company announced a significant restructuring of its mobile platform business in order to focus the mobile product line on more profitable opportunities and align its expenses with corporate targets. The Company began implementing actions to significantly downsize the mobile platform organization to refocus its technology to other emerging opportunities, but it will continue its commitment to wireless connectivity such as WiFi and other wireless standards. As a result of these actions, the Company recorded restructuring and other related charges of $44.4 million in fiscal 2016 related to this restructuring. The charge primarily included severance benefits for 825 employees who were notified of their termination, a loss on early contract termination, the impairment of technology licenses and certain equipment, and the write down of inventory. Substantially all of the affected employees departed by the end of fiscal 2016.

The Company expects to complete remaining actions, including the finalization of certain additional related activities within the first half of fiscal 2017 and will incur additional charges of approximately $5 million. As a result, total restructuring and other related charges will be lower than the original estimate of $100 million to $130 million primarily due to the Company’s decision to retain approximately 140 more mobile employees to support the remaining mobile business than it originally anticipated and certain equipment planned for disposal was subsequently determined to have alternative use. The Company also decided to offer retention bonuses to another 128 mobile employees to remain through the ramp down of certain operations. Their benefit packages are recognized ratably over the employees’ remaining service periods through the first half of fiscal 2017.

In May 2015, the Company decided to further reduce its research and development operations in Israel and close certain other design centers, primarily located in Europe and the U.S. in connection with its ongoing effort to streamline its business. As a result, the Company recorded a total $16.3 million charge in fiscal 2016 comprised of $15.1 million for severance related to the termination of 358 employees who were notified of their termination and $1.2 million for a lease obligation related to a facility that the Company vacated in July 2015. Substantially all of the activities associated with these actions were completed and all affected employees departed before the end of fiscal 2016.

In March 2015, the Company exercised the early buyout option under an existing operating lease for corporate equipment that it planned to sell as part of a cost reduction action. The Company actively sought a buyer and classified the equipment as held for sale within prepaid and current assets on the consolidated balance sheet. It also ceased depreciation on the asset and recorded impairment charges of $1.4 million through the second quarter ended August 1, 2015. In October 2015, the Company sold the corporate equipment for net proceeds of $9.3 million, which approximated the carrying value and resulted in no gain or loss recognized upon the sale of the asset.

In addition to the restructuring actions described in the preceding paragraphs, the Company recorded $1.4 million of additional charges primarily associated with ongoing operating expenses of vacated facilities related to restructuring actions in previous fiscal years and maintenance costs for the corporate equipment sold in October 2015.

Fiscal 2015. The Company decided to streamline its operations, primarily in Israel to align with its overall strategic plan, and to discontinue the development of a product it originally acquired in a business combination. As a result, the Company recorded $13.8 million of restructuring and other related charges in fiscal 2015. Facilities and related costs primarily included a charge for a portion of the lease obligation related to vacating the floors the Company no longer planned to occupy in one of its Israel facilities. The write-off of an acquired intangible asset in fiscal 2015 was due to the Company’s decision to discontinue the related project. These actions were substantially completed by the end of fiscal 2015. In addition, the Company decided to exercise an early buy out option to acquire an asset under an existing operating lease agreement, and recorded a $3.2 million loss from the termination of the agreement in fiscal 2015.

Fiscal 2014. The Company recorded $4.7 million of restructuring and other related charges in fiscal 2014 in connection with its decision to close two sites. As a result, the Company incurred severance and exit-related costs in connection with vacating the facilities, in addition to the write-off of equipment. All activities were substantially completed by the end of fiscal 2014.

The following table sets forth a reconciliation of the beginning and ending restructuring liability balances by each major type of costs associated with the restructuring charges (in thousands):


	Severance and Related Costs			Facilities and Related Costs			Other Exit-Related Costs			Total
Balance at February 1, 2014	$	51		$	2,383		$	19		$	2,453
Restructuring charges		5,181			1,924			3,316			10,421
Net cash payments		(5,232	)		(2,968	)		(105	)		(8,305	)

Balance at January 31, 2015		—			1,339			3,230			4,569
Restructuring charges		43,926			1,407			2,178			47,511
Net cash payments		(42,741	)		(1,597	)		(3,764	)		(48,102	)
Exchange rate adjustment		(30	)		(106	)		—			(136	)

Balance at January 30, 2016	$	1,155		$	1,043		$	1,644		$	3,842

During fiscal 2016, the Company paid severance and related benefit costs to a total of 1,191 employees who departed in fiscal 2016 as part of the restructuring actions described above. The remaining severance is expected to be paid within the first half of fiscal 2017. The balance at January 30, 2016 for facility and related costs includes remaining payments under lease obligations related to vacated space that are expected to be paid through fiscal 2018. Other exit-related costs are expected to be paid in the first quarter of fiscal 2017.

Income Taxes

12 Months Ended

Jan. 30, 2016

Income Taxes

Note 9 — Income Taxes

The U.S. and non-U.S. components of income before income taxes consist of the following (in thousands):


	Year Ended
	January 30, 2016			January 31, 2015		February 1, 2014
U.S. operations	$	33,787		$	31,942	$	31,339
Non-U.S. operations		(832,841	)		400,211		274,918

	$	(799,054	)	$	432,153	$	306,257

The provision (benefit) for income taxes consists of the following (in thousands):


	Year Ended
	January 30, 2016			January 31, 2015			February 1, 2014
Current income tax provision (benefit):
Federal	$	10,756		$	9,096		$	5,774
State		83			(161	)		73
Foreign		(4,589	)		785			(18,829	)

Total current income tax provision (benefit)		6,250			9,720			(12,982	)

Deferred income tax provision (benefit):
Federal		(4,355	)		(1,775	)		317
State		580			16			32
Foreign		9,871			(11,154	)		3,570

Total deferred income tax provision (benefit)		6,096			(12,913	)		3,919

Total provision (benefit) for income taxes	$	12,346		$	(3,193	)	$	(9,063	)

The income tax expense for fiscal 2016 includes current income tax liability of $14.5 million, an additional tax provision of $3.1 million related to a $15.4 million payment to the Company’s former Chief Executive Officer (see “Note 14 — Related Party Transactions”) and a $6.1 million reduction in net deferred tax assets that was primarily caused by the recognition of a valuation allowance against certain non-U.S. loss carryforwards that will not be realized in the foreseeable future. These expenses were offset by a net reduction in unrecognized tax benefits of $11.6 million that arose from the release of $20.6 million due to the settlement of an audit in a non-U.S. jurisdiction and the expiration of statutes of limitation in non-U.S. jurisdictions, net of a $9.0 million increase in current unrecognized tax benefits. The income tax benefit for fiscal 2015 includes the current income tax liability of $17.4 million plus a $7.4 million increase in current unrecognized tax benefit. These charges were offset by a reduction in unrecognized tax benefits that arose from the release of $16.4 million due to the expiration of statutes of limitation in non-U.S. jurisdictions and a $12.9 million increase in net deferred tax assets. The income tax benefit for fiscal 2014 included the current income tax liability of $13.2 million plus a $9.1 million increase in current unrecognized tax benefit which were offset by a reduction in unrecognized tax benefits that arose from the release of $31.8 million due to the expiration of statutes of limitation and the settlement of a tax audit in non-U.S. jurisdictions.

Deferred tax assets consist of the following (in thousands):


	January 30, 2016			January 31, 2015
Deferred tax assets:
Federal and California research and other tax credits	$	414,662		$	382,726
Reserves and accruals		35,200			35,538
Share-based compensation		4,476			4,502
Net operating losses		11,055			10,740

Gross deferred tax assets		465,393			433,506
Valuation allowance		(424,914	)		(382,796	)

Total deferred tax assets		40,479			50,710
Total deferred tax liabilities		(7,073	)		(11,209	)

Net deferred tax assets	$	33,406		$	39,501

As presented in the consolidated balance sheets as of January 30, 2016 and January 31, 2015, and in the table above, unrecognized tax benefits have been offset by deferred tax assets for certain net operating losses that are available to be used in the amount of $6.3 million and $4.2 million, respectively.

During fiscal 2016, deferred tax assets, net of a corresponding valuation allowance, decreased $6.1 million from the end of fiscal 2015, primarily due to a valuation allowance that was recorded against deferred tax assets in Israel. As of January 30, 2016 and January 31, 2015, the Company had $34.5 million and $22.3 million of deferred tax assets, respectively, classified as non-current included in other non-current assets on the consolidated balance sheet.

At the end of fiscal 2016, the Company recorded a valuation allowance of $424.9 million, an increase of $42.1 million from fiscal 2015. The Company provided a full valuation allowance against its federal and various state research credits which it earns in excess of its current year tax liabilities, as well as a portion against its net operating loss carryforwards in the U.S. federal and California. Based on the available objective positive and negative evidence, the Company determined that it is more likely than not that these research credits and net operating losses will not be realized. The Company also provided a full valuation allowance against the deferred tax assets of a portion of its operations in Israel, which has cumulative losses in recent years and is not projecting sufficient future taxable income.

As of January 30, 2016, the Company had net operating loss carryforwards available to offset future taxable income of approximately $90.8 million, $1.6 million and $6.3 million for foreign, U.S. federal and state of California purposes, respectively. The federal carryforwards will expire in various fiscal years between 2022 and 2028, and the California carryforwards will expire at various fiscal years between 2018 and 2033, if not utilized before these years. The majority of the Company’s non-U.S. losses carry forward indefinitely. For U.S. federal income tax return purposes, the Company had research tax credit carryforwards of approximately $248.6 million that expire through fiscal 2036. As of January 30, 2016, the Company had unused California research and tax credit carryforwards of approximately $260.6 million, which can be carryforward indefinitely. Included in the U.S. federal and California carryforward amounts are $59.8 million and $57.7 million, respectively, that are attributable to excess tax benefits from stock options. Upon realization, the benefit associated with these credits will increase additional paid-in capital. The Company also has research and investment tax credit carryforwards of approximately $21.6 million in other U.S. states that expire through fiscal 2031 due to the statutes of limitation.

The Company consists of a Bermuda parent holding company with various foreign and U.S. subsidiaries. The applicable statutory rate in Bermuda is zero for the Company for fiscal 2016, 2015 and 2014. For purposes of the reconciliation between the provision (benefit) for income taxes at the statutory rate and the effective tax rate, a notional U.S. 35% rate is applied as follows:


	Year Ended
	January 30, 2016			January 31, 2015			February 1, 2014
Provision at U.S. notional statutory rate		35.0	%		35.0	%		35.0	%
Non-deductible share-based compensation		(5.9	)		11.2			19.4
Difference in U.S. and non-U.S. tax rates		(31.3	)		(46.0	)		(55.8	)
Benefits from utilization of general business credits		5.0			(12.0	)		(14.1	)
Change in valuation allowance		(4.0	)		10.5			11.9
Other		(0.3	)		0.6			0.6

Effective tax rate		(1.5	)%		(0.7	)%		(3.0	)%

The following table reflects changes in the unrecognized tax benefits (in thousands):


	Year Ended
	January 30, 2016			January 31, 2015			February 1, 2014
Unrecognized tax benefits as of the beginning of the period	$	45,197		$	51,682		$	79,031
Increases related to prior year tax positions		304			976			499
Decreases related to prior year tax positions		(4,334	)		(386	)		(111	)
Increases related to current year tax positions		4,237			5,356			2,666
Settlements		(704	)		—			(7,423	)
Lapse in the statute of limitations		(9,739	)		(10,691	)		(13,969	)
Foreign exchange gain		(5,822	)		(1,740	)		(9,011	)

Gross amounts of unrecognized tax benefits as of the end of the period	$	29,139		$	45,197		$	51,682

Included in the balances as of January 30, 2016 is $27.8 million of unrecognized tax benefit that would affect the effective income tax rate if recognized. Also, $6.3 million and $4.2 million of the gross unrecognized tax benefits presented in the table above are offset against deferred tax assets in the consolidated balance sheets as of January 30, 2016 and January 31, 2015, respectively.

The amounts in the table above do not include the related interest and penalties. The Company’s policy is to recognize these interest and penalties as a component of income tax expense. The amount of interest and penalties accrued was approximately $26.4 million as of January 30, 2016, $27.7 million as of January 31, 2015 and $29.6 million as of February 1, 2014. The consolidated statements of operations for fiscal 2016, 2015 and 2014 included $4.6 million, $3.8 million and $6.2 million, respectively, of interest and penalties related to the unrecognized tax benefits.

The Company is subject to income tax audits by the respective tax authorities in all of the jurisdictions in which it operates. The examination of tax liabilities in each of these jurisdictions requires the interpretation and application of complex and sometimes uncertain tax laws and regulations. As of January 30, 2016, the material jurisdictions that are subject to examination include China, Israel, Singapore, Switzerland and the United States for the Company’s fiscal years 2005 through 2015. As of January 30, 2016, several of the Company’s non-U.S. entities are under examination for fiscal years encompassing 2006 through 2015. The Company is also under examination by the state of California for fiscal year 2013 and 2014.

For fiscal 2017, the Company will continue to review its tax positions and provide for or reverse unrecognized tax benefits as issues arise. During the next 12 months, it is reasonably possible that the amount of unrecognized tax benefits could increase or decrease significantly due to changes in tax law in various jurisdictions, new tax audits and changes in the U.S. dollar as compared to foreign currencies within the next 12 months. Excluding these factors, uncertain tax positions may decrease by as much as $16.2 million from the lapse of the statutes of limitation in various jurisdictions during the next 12 months.

The Singapore Economic Development Board (“EDB”) initially granted a 10-year Pioneer Status in July 1999 to the Company’s Singapore subsidiary. In October 2004, the Company’s subsidiary in Singapore was granted a second incentive known as the Develop and Expansion Incentive (“DEI”), and in June 2006, the EDB agreed to extend the Pioneer status for 15 years to June 2014. The Company re-negotiated with the Singapore government and in fiscal 2015, they extended the DEI tax credits to the Company until June 2019. In order to retain these tax benefits in Singapore, the Company must meet certain operating conditions relating to, among other things, maintenance of a regional headquarters function, and research and development activities in Singapore. In fiscal 2016, 2015 and 2014 tax savings associated with these tax holidays were approximately $5.3 million, $0.1 million and $3.7 million, respectively, which if paid would impact the Company’s earnings per share by $0.01 per share in fiscal 2016 and 2014, and less than $0.01 per share in fiscal 2015.

Under the Israeli Encouragement law of “approved or benefited enterprise,” two branches of Marvell Israel (M.I.S.L.) Ltd., the GTL branch and the cellular branch (formerly Marvell DSPC), are entitled to approved and benefited tax programs that include reduced tax rates and exemption of certain income, subject to various operating and other conditions. Income from the approved or benefited enterprises, with the exception of capital gains, is eligible up to fiscal 2027. For fiscal 2014, the benefit associated with these approved or benefited enterprise programs was $2.2 million, which provided earnings per share of $0.01 per share in fiscal 2014. There was no such benefit in fiscal 2016 and fiscal 2015.

During fiscal 2007, each of the Swiss Federal Department of Economy and the Vaud Cantonal Tax Administration granted the Company’s subsidiary in Switzerland a 10 year tax holiday on revenues from research and design wafer supply trading activities, which commenced in February 2007 and expired at the end of fiscal 2016. The fiscal 2016, 2015 and 2014 tax savings associated with this tax holiday was approximately $3.7 million, $4.5 million and $5.1 million, respectively, which provided earnings per share of $0.01 per share in fiscal 2016 and 2015, and less than $0.01 per share in fiscal 2014.

The Company’s principal source of liquidity as of January 30, 2016 consisted of approximately $2.3 billion of cash, cash equivalents and short-term investments, of which approximately $830 million was held by foreign subsidiaries (outside Bermuda). Approximately $620 million of this amount held by foreign subsidiaries is related to undistributed earnings, which have been indefinitely reinvested outside of Bermuda. These funds are primarily held in China, Israel, Singapore, the United States and Switzerland. The Company plans to use such amounts to fund various activities outside of Bermuda including working capital requirements, capital expenditures for expansion, funding of future acquisitions, or other financing activities. If such funds were needed by the parent company in Bermuda or if the amounts were otherwise no longer considered indefinitely reinvested, the Company would incur a tax expense of approximately $200 million.

Commitments and Contingencies

12 Months Ended

Jan. 30, 2016

Commitments and Contingencies

Note 10 — Commitments and Contingencies

Warranty Obligations

The Company’s products carry a standard 90-day warranty with certain exceptions in which the warranty period can extend to more than one year based on contractual agreements. The Company’s warranty expense has not been significant in the periods presented.

Lease Commitments

The Company leases some of its facilities, equipment and computer aided design software under non-cancelable operating leases. Rent expense, net of sublease income for fiscal 2016, 2015, and 2014 was approximately $23.8 million, $26.1 million and $25.8 million, respectively. The Company also purchases certain intellectual property under technology license obligations. Future minimum lease payments, net of estimated sublease income, and payments under technology license obligations as of January 30, 2016, are presented in the following tables (in thousands):


Fiscal Year	Minimum Operating Leases Payments
2017	$	63,296
2018		35,679
2019		24,407
2020		14,280
2021		2,939
Thereafter		4,946

Total future minimum lease payments	$	145,547


Fiscal Year	Technology License Obligations
2017	$	14,769
2018		12,630
2019 and thereafter		—

Total future minimum lease payments	$	27,399
Less: amount representing interest		(580	)

Present value of future minimum payments		26,819
Less: current portion		(14,358	)

Non-current portion	$	12,461

Technology license obligations include the liabilities under the subscription agreements for technology licenses between the Company and various vendors.

Purchase Commitments

Under the Company’s manufacturing relationships with its foundry partners, cancellation of all outstanding purchase orders is allowed but requires payment of all costs and expenses incurred through the date of cancellation. As of January 30, 2016, these foundries had incurred approximately $136.8 million of manufacturing costs and expenses relating to the Company’s outstanding purchase orders.

Intellectual Property Indemnification

The Company has agreed to indemnify certain customers for claims made against the Company’s products where such claims allege infringement of third-party intellectual property rights, including, but not limited to, patents, registered trademarks, and/or copyrights. Under the aforementioned indemnification clauses, the Company may be obligated to defend the customer and pay for the damages awarded against the customer under an infringement claim as well as the customer’s attorneys’ fees and costs. The Company’s indemnification obligations generally do not expire after termination or expiration of the agreement containing the indemnification obligation. Generally, there are limits on and exceptions to the Company’s potential liability for indemnification. Although historically the Company has not made significant payments under these indemnification obligations, the Company cannot estimate the amount of potential future payments, if any, that it might be required to make as a result of these agreements. The maximum potential amount of any future payments that the Company could be required to make under these indemnification obligations could be significant.

Contingencies

The Company and certain of its subsidiaries are currently parties to various legal proceedings, including those noted in this section. The legal proceedings and claims described below could result in substantial costs and could divert the attention and resources of the Company’s management. The Company is also engaged in other legal proceedings and claims not described below, which arise in the ordinary course of its business. Litigation is subject to inherent uncertainties and unfavorable rulings could occur. An unfavorable ruling in litigation could require the Company to pay damages, one-time license fees or ongoing royalty payments, and could prevent the Company from manufacturing or selling some of its products or limit or restrict the type of work that employees involved in such litigation may perform for the Company, any of which could adversely affect financial results in future periods. The Company believes that its products do not infringe valid and enforceable claims and it will continue to vigorously defend against the allegations in these matters. However, there can be no assurance that these matters will be resolved in a manner that is not adverse to the Company’s business, financial condition, results of operations or cash flows.

As of January 30, 2016, the Company has an accrued litigation balance of $739.8 million related to certain legal proceedings described below. Unless otherwise stated, the Company is currently unable to predict the final outcome of these lawsuits and therefore cannot determine the likelihood of loss or estimate a range of possible loss.

Carnegie Mellon University Litigation. On March 6, 2009, CMU filed a complaint in the U.S. District Court for the Western District of Pennsylvania (“W.D. of Pennsylvania”). CMU has asserted U.S. Patent Nos. 6,201,839 and 6,438,180 (collectively, the “CMU patents in suit”), which relate to read-channel integrated circuit devices and the hard disk drive (“HDD”) incorporating such devices. A jury trial began on November 26, 2012. On December 26, 2012, a jury delivered a verdict that found the CMU patents in suit were literally and willfully infringed and valid, and awarded past damages in the amount of $1.17 billion. Based on post-trial motions and decisions, the W.D. of Pennsylvania calculated the damages including enhancement to total approximately $1.54 billion, and held that, under its decision, CMU is entitled to post judgment interest and an ongoing royalty. On May 7, 2014, the W.D. of Pennsylvania entered final judgment, from which the Company filed a notice of appeal on May 14, 2014. On August 4, 2015, the W.D. of Pennsylvania in a three-judge panel issued an opinion affirming in part, reversing in part, and vacating and remanding in part. On February 16, 2016, the Company and CMU entered into a Settlement Agreement and Patent License pursuant to which the Company has agreed to pay an aggregate of $750 million, without any ongoing royalty payments, to CMU and the parties have agreed to mutually acceptable release, license and covenant not to sue provisions. Please see “Note 15 — Subsequent Events” for additional information on the effect of the settlement in the Company’s consolidated financial statements for fiscal 2016. The Company expects the action to be finally dismissed in the third quarter of fiscal 2017, approximately 6 months after payment of the full amount of the settlement payment. In connection with the settlement, the primary supersedeas bond that the Company entered into in connection with this litigation was reduced to $439 million and the secondary bond, which is secured, was adjusted to $311 million. All of the Company’s obligations under both bonds were discharged pursuant to an order releasing supersedeas bonds on April 21, 2016. Any bond specific indemnity agreement will be terminated and released upon final dismissal of the action.

USEI Litigation. On October 9, 2009, U.S. Ethernet Innovations, LLC (“USEI”) filed a complaint in the U.S. District Court for the Eastern District of Texas (“E.D. of Texas”), in which USEI accused a number of system manufacturers, including the Company’s customers, of patent infringement (the “USEI litigation”). Specifically, USEI asserted that these customers infringe U.S. Patent Nos. 5,307,459, 5,434,872, 5,732,094 and 5,299,313, which relate to Ethernet technologies. The complaint seeks unspecified damages and an injunction.

On May 4, 2010, MSI filed a motion to intervene in the USEI litigation, which was granted on May 19, 2010. On July 13, 2010, the E.D. of Texas issued an order granting the defendants’ motion to transfer the action to the U.S. District Court for the Northern District of California (“N.D. of California”); the case was formally transferred on August 23, 2010. On September 14, 2011, USEI withdrew its allegations against MSI for the ‘459 patent. The N.D. of California issued a first claim construction ruling on January 31, 2012 and a supplemental claim construction ruling on August 29, 2012. On August 16, 2013, the N.D. of California granted defendants’ summary judgment motion to preclude the plaintiff from recovering certain pre-suit damages. On November 7, 2014, on summary judgment, the N.D. of California found that all the patents-in-suit were either invalid or not infringed. On December 1, 2014, the N.D. of California entered a judgment in favor of defendants and awarded defendants’ costs. On December 29, 2014, USEI filed a motion to alter or amend the N.D. of California’s summary judgment order, which the N.D. of California denied on March 31, 2015. On April 24, 2015, USEI filed its notice of appeal. On April 25, 2016, the Federal Circuit affirmed the N.D. of California’s judgment in favor of MSI. On June 29, 2016, the Federal Circuit denied USEI’s petition for rehearing.

Azure Networks Litigation. On March 22, 2011, Azure Networks, LLC (“Azure”) and Tri-County Excelsior Foundation filed suit in the E.D. of Texas against MSI and eight other companies. The Complaint asserts U.S. Patent No. 7,756,129 against MSI’s Bluetooth products. MSI filed its answer and counterclaims on July 20, 2011. On November 2, 2012, MSI and the other defendants filed a motion for summary judgment of invalidity, which was denied. A claim construction hearing was held on December 20, 2012. On January 15, 2013, the magistrate judge issued a claim construction ruling. On May 20, 2013, the E.D. of Texas issued an order denying plaintiff’s motion for reconsideration and adopted the magistrate judge’s claim construction ruling. On May 30, 2013, the E.D. of Texas entered a judgment of non-infringement. On June 24, 2013, Azure appealed. On November 6, 2014, the Federal Circuit issued an order vacating the judgment of non-infringement and remanding for further proceedings. MSI filed a petition for writ of certiorari to the United States Supreme Court on February 4, 2015. On February 10, 2015, the E.D. of Texas stayed all proceedings pending the Supreme Court’s ruling on the Company’s petition. On April 20, 2015, the United States Supreme Court granted MSI’s petition, vacating the Federal Circuit’s judgment and remanding the case for further consideration. The case was dismissed with prejudice on October 14, 2015 with no significant impact on the Company’s consolidated financial statements.

On January 13, 2015, Azure filed a second suit against MSI in the E.D. of Texas, alleging infringement of U.S. Patent Nos. 8,582,570; 8,582,571; 8,588,196; 8,588,231; 8,589,599; 8,675,590; 8,683,092; 8,700,815; 8,732,347; and 8,732,361, purportedly related to certain Wi-Fi and near field communication (“NFC”) technologies. The complaint seeks unspecified damages. On April 6, 2015, MSI filed an amended answer and counterclaims. The case was dismissed with prejudice on January 4, 2016 with no significant impact on the Company’s consolidated financial statements.

France Telecom Litigation. On June 26, 2012, France Telecom S.A. filed a complaint against MSI in the U.S. District Court for the Southern District of New York. The complaint asserts U.S. Patent No. 5,446,747 against MSI’s communications processors and thin modems. The complaint sought unspecified damages as well as injunctive relief. MSI answered the complaint on July 18, 2012 and August 1, 2012. On July 30, 2012, MSI filed a motion to transfer the lawsuit to the N.D. of California. On September 17, 2012, the Court granted MSI’s motion and transferred the case to the N.D. of California. A claim construction hearing was held on December 13, 2013. On April 14, 2014, the Court denied MSI’s motion for summary judgment of invalidity, and granted MSI’s summary judgment motion concerning certain damages preclusion. A jury trial began on September 17, 2014. On September 30, 2014, a jury delivered a verdict that found the patent in suit was literally, but not willfully, infringed and valid, and awarded damages. The award did not have a significant impact on the Company’s consolidated financial statements. A hearing for post-trial motions and non-jury issues took place on January 14, 2015. On March 2, 2015, the N.D. of California issued an order on post-trial briefs finding no direct infringement by Marvell as a matter of law and entered judgment in favor of Marvell. On March 30, 2015, France Telecom filed a notice of appeal. On April 10, 2015, MSI filed a notice of cross appeal. On July 15, 2015, the Federal Circuit granted the parties’ joint stipulation to dismiss both parties’ appeals.

Vantage Point Technology Patent Litigation. On November 21, 2013, Vantage Point Technology, Inc. (“VPT”) filed suit against a third-party defendant in the E.D. of Texas for patent infringement relating to processor technology. On February 3, 2014, VPT filed an amended complaint against the third party and added MSI as an additional defendant. The complaint sought unspecified damages. On December 8, 2014, the case was transferred to the N.D. of California. The case was dismissed with prejudice in March, 2015 with no significant impact on the Company’s consolidated financial statements.

Bandspeed Litigation. On May 9, 2014, Bandspeed, Inc. filed suit against MSI in the U.S. District Court for the Western District of Texas, alleging infringement of U.S. Patent Nos. 7,027,418; 7,570,614; 7,477,624; 7,903,608; and 8,542,643, purportedly related to certain Bluetooth technology. The complaint sought unspecified damages. On February 13, 2015, Bandspeed amended its complaint and added allegations of infringement of U.S. Patent No. 8,873,500. On April 29, 2015, the parties filed a joint motion to dismiss the case with prejudice. The case was dismissed with prejudice on May 7, 2015 with no significant impact on the Company’s consolidated financial statements.

NXP Litigation. On January 22, 2015, NXP Semiconductors N.V. filed suit against MSI in the N.D. of California, alleging infringement of U.S. Patent Nos. 5,939,791; 7,039,133; 8,185,050; and 8,203,432, purportedly related to certain NFC technology. The complaint sought unspecified damages. MSI filed its response and counterclaims on February 26, 2015. Marvell International Limited (“MIL”) also filed counterclaims against NXP Semiconductors U.S.A. (“NXP USA”), alleging infringement of U.S. Patent Nos. 7,047,393; 7,555,065; and 7,302,600. On February 2, 2015, MIL filed suit against NXP USA in the U.S. District Court for the Central District of California, alleging patent infringement of U.S. Patent Nos. 8,171,309; 7,957,777; 7,454,634; and 6,903,448, related to certain NFC and automotive technologies. On April 15, 2015, the parties filed stipulations to dismiss without prejudice their claims and counterclaims in both cases.

Paone Litigation. On February 6, 2015, Luciano F. Paone filed suit against MSI in the U.S. District Court for the Eastern District of New York, alleging infringement of U.S. Patent No. 6,259,789, purportedly related to certain encryption technology. The complaint seeks unspecified damages. MSI filed its response on May 22, 2015. The case was dismissed with prejudice on December 31, 2015 with no significant impact on the Company’s consolidated financial statements.

Innovatio Litigation. On March 16, 2015, Innovatio IP Ventures, LLC filed suit against MSI in the U.S. District Court for the Northern District of Illinois, alleging infringement of U.S. Patent Nos. 6,697,415; 5,844,893; 5,740,366; 7,916,747; 6,665,536; 7,013,138; 7,107,052; 5,546,397; 7,710,907; 7,710,935; 6,714,559; 7,457,646; and 6,374,311, purportedly related to certain wireless technology. The complaint seeks unspecified damages.

Visual Memory Litigation. On May 8, 2015, Visual Memory LLC (“Visual Memory”) filed suit against MSI in the District of Delaware, alleging infringement of U.S. Patent Nos. 5,654,932 and 6,026,027, purportedly related to certain memory technology. The complaint seeks unspecified damages. The case was dismissed with prejudice on September 4, 2015, with no significant impact on the Company’s consolidated financial statements.

Luna Litigation and Consolidated Cases. On September 11, 2015, Daniel Luna filed an action asserting putative class action claims on behalf of the Company’s shareholders in the United States District Court for the Southern District of New York (“S.D. of New York”). This action was consolidated with two additional, nearly identical complaints subsequently filed by Philip Limbacher and Jim Farno. The complaints asserted violations of federal securities laws based on allegations that the Company and certain of its officers and directors (Sehat Sutardja, Michael Rashkin, and Sukhi Nagesh) made, caused to be made, or failed to correct false and/or misleading statements in the Company’s press releases and public filings. The complaints request damages in unspecified amounts, costs and fees of bringing the action, and other unspecified relief.

On November 18, 2015, the S.D. of New York granted the Company’s motion to transfer the consolidated cases to the N.D. of California. On December 21, 2015, the N.D. of California granted the Company’s motion to deem the consolidated cases related to the Saratoga litigation, discussed below. On February 8, 2016, the N.D. of California granted an unopposed motion to appoint Plumbers and Pipefitters National Pension Fund as Lead Plaintiff. On March 19, 2016, Lead Plaintiff filed a consolidated amended complaint. On April 29, 2016, Marvell and each of the individual defendants each filed motions to dismiss; Lead Plaintiff’s oppositions were filed on June 10, 2016; and defendants’ replies are due by July 15, 2016. The hearing on the motions to dismiss is set for July 29, 2016.

Saratoga Litigation. On October 16, 2015, Saratoga Advantage Trust Technology & Communications Portfolio (“Saratoga”) filed an action asserting shareholder derivative claims ostensibly on behalf of the Company in the Superior Court of the State of California, County of Santa Clara. The complaint names eight current or former officers and/or directors (Sehat Sutardja, Weili Dai, Juergen Gromer, Arturo Krueger, John Kassakian, Randhir Thakur, Michael Rashkin, and Sukhi Nagesh) as defendants and asserts various California state law causes of action based on allegations that the Company and the named officers and directors made, caused to be made, or failed to correct false and/or misleading statements in the Company’s press releases and public filings, leading to the filing of securities class actions that allegedly damaged the Company. The Company was named as a nominal defendant. The complaint requests damages and restitution in unspecified amounts, equitable and/or injunctive relief, costs and fees of bringing the action, and other unspecified relief.

On October 23, 2015, the Company removed the action to the N.D. of California. On December 21, 2015, the N.D. of California denied Saratoga’s motion to remand. On December 21, 2015, the N.D. of California granted the Company’s motion to deem the action related to the consolidated Luna actions, discussed above. On January 22, 2016, the Company filed a motion to dismiss the complaint; on February 19, 2016, Saratoga filed an opposition; and on March 4, 2016, the Company filed a reply. On March 25, 2016, the District Court held a hearing on the motion and took the matter under submission. To the Company’s knowledge, none of the individual defendants has yet been served.

Surety Bonds

On May 14, 2014, the Company filed a Notice of Appeal to appeal the final judgment issued by the W.D of Pennsylvania in the CMU litigation. In order to stay the execution of the final judgment pending its appeal, the Company filed a supersedeas bond for $1.54 billion with the W.D. of Pennsylvania in the event the Company did not fully satisfy a final judgment as affirmed after the completion of all appellate proceedings. The bond was issued by a consortium of sureties authorized by the U.S. Treasury. In support of the bond, the Company entered into separate indemnity agreements with each of the sureties to indemnify the sureties from all costs and payments made under the bond. The indemnity agreements did not require collateral to be posted at the time of the issuance of the bond. Therefore no cash is considered restricted as of the date of this filing. However, the indemnity agreements provide that each of the sureties have the right to demand to be placed in funds or call for collateral under pre-defined events.

On November 14, 2014, the Company filed a second surety bond for $216 million and filed a commitment letter from the sureties to issue up to an additional $95 million in bonding under certain conditions. The second bond and commitment are secured by the Company’s campus located in Santa Clara, California, which has a carrying value of $133.0 million at January 30, 2016.

In connection with the settlement that was reached with CMU for a total $750 million in February 2016, the primary supersedeas bond that the Company entered into was reduced to $439 million and the secondary bond was adjusted to $311 million and both were discharged pursuant to an order releasing supersedeas bonds on April 21, 2016. The underlying indemnity agreements will terminate upon the final dismissal of the case in the third quarter of fiscal 2017. For additional information, see CMU litigation under “Contingencies” above.

Indemnities, Commitments and Guarantees

During its normal course of business, the Company has made certain indemnities, commitments and guarantees under which it may be required to make payments in relation to certain transactions. These indemnities may include intellectual property indemnities to the Company’s customers in connection with the sales of its products, indemnities for liabilities associated with the infringement of other parties’ technology based upon the Company’s products, indemnities for general commercial obligations, indemnities to various lessors in connection with facility leases for certain claims arising from such facility or lease, and indemnities to directors and officers of the Company to the maximum extent permitted under the laws of Bermuda. In addition, the Company has contractual commitments to various customers, which could require the Company to incur costs to repair an epidemic defect with respect to its products outside of the normal warranty period if such defect were to occur. The duration of these indemnities, commitments and guarantees varies, and in certain cases, is indefinite. Some of these indemnities, commitments and guarantees do not provide for any limitation of the maximum potential future payments that the Company could be obligated to make. In general, the Company does not record any liability for these indemnities, commitments and guarantees in the accompanying consolidated balance sheets as the amounts cannot be reasonably estimated and are not considered probable. The Company does, however, accrue for losses for any known contingent liability, including those that may arise from indemnification provisions, when future payment is probable.

Benefit Plans

12 Months Ended

Jan. 30, 2016

Benefit Plans

Note 11 — Benefit Plans

The Company sponsors a 401(k) savings and investment plan that allows eligible U.S. employees to participate by making pre-tax contributions to the 401(k) plan ranging from 1% to 50% of eligible earnings subject to a required annual limit. The Company matches 100% of the employee contribution up to $500 per eligible employee per quarter. The participant must be employed by the Company on the last day of the calendar quarter to qualify for the match. At the end of the calendar year, the eligible employees receive a true-up match equal to the accumulated employee contribution for the calendar year up to $2,000. The Company made matching contributions to employees of $4.9 million in fiscal 2016, and $5.1 million in each of fiscal 2015 and 2014. As of January 30, 2016, the 401(k) plan offers a variety of investment alternatives, representing different asset classes. Employees may not invest in the Company’s common shares through the 401(k) plan.

The Company also has voluntary defined contribution plans in various non-U.S. locations. In connection with these plans, the Company made contributions on behalf of employees totaling $14.5 million, $18.5 million and $20.5 million during fiscal 2016, 2015 and 2014, respectively. The Company also maintains a limited number of defined benefit plans for certain non-U.S. locations. Total costs under these plans were $1.5 million in fiscal 2016, and $0.1 million in each of fiscal 2015 and 2014.

Shareholders' Equity

12 Months Ended

Jan. 30, 2016

Shareholders' Equity

Note 12 — Shareholders’ Equity

Common and Preferred Stock

As of January 30, 2016, the Company is authorized to issue 992.0 million shares of $0.002 par value common stock and 8.0 million shares of $0.002 par value preferred stock. As of January 30, 2016 and January 31, 2015, no shares of preferred stock were outstanding.

1995 Stock Option Plan

In April 1995, the Company adopted the 1995 Stock Option Plan (the “Option Plan”). The Option Plan, as amended from time to time, had 383.4 million common shares reserved for issuance thereunder as of January 30, 2016. Options granted under the Option Plan generally have a term of 10 years and generally must be issued at prices equal to the fair market value of the stock on the date of grant. Incentive stock options granted to shareholders who own greater than 10% of the outstanding stock at the time of the grant may not have a term exceeding five years and these options must be issued at prices of at least 110% of the fair market value of the stock on the date of grant. Equity awards to new hires under the Option Plan generally vest 20% one year after the vesting commencement date and the remaining shares vest one-sixtieth per month over the remaining 48 months. Other equity awards generally vest annually in four equal installments.

The Company can also grant stock awards, which may be subject to vesting. Further, the Company can grant restricted stock unit (“RSU”) awards. RSU awards are denominated in shares of stock, but may be settled in cash or shares upon vesting, as determined by the Company at the time of grant.

As of January 30, 2016, approximately 91.4 million shares remained available for future issuance under the Option Plan.

Fiscal 2016. In April 2015, the Company granted performance-based equity awards to each of its executive officers, which are based on their achievement of certain performance goals for a new performance period beginning in fiscal 2016. These equity awards include RSUs which vest based on the achievement of certain financial goals (each a “Financial Performance RSU”), and performance awards for which a portion shall vest based on the achievement of individual strategic objectives (each a “Strategic Objective Award”) and a portion shall vest based on total shareholder return (each a “Total Shareholder Return Award”). These awards are reported as “Performance-Based,” except for the Total Shareholder Return Award which is reported as “Market-Based.” The Financial Performance RSUs will be earned based on the achievement of revenue and modified non-GAAP operating income that have been established at “threshold,” “target” and “maximum” levels and will vest on the first anniversary of the vest commencement date. The Strategic Objective Awards will vest on the first anniversary of the commencement date at the target level based on the achievement of individual strategic goals and, with respect to a portion of each Strategic Objective Award, the further achievement of either the revenue or modified non-GAAP operating income objective established for the Financial Performance RSU. The Total Shareholder Return Awards will vest on the second anniversary of the commencement date based on the Company’s stock price performance in comparison to the Philadelphia Semiconductor Sector Index. Share-based compensation for the Total Shareholder Return Award is measured using the Monte Carlo valuation method since the award is indexed to the price of the Company’s common stock as set forth under the terms of the award.

Fiscal 2015. In April 2014, the Company granted performance-based equity awards to each of our executive officers which are based on their achievement of certain performance goals in fiscal 2015 and 2016. These equity awards include RSUs which vest based on financial performance criteria (“Financial Performance RSU”) and restricted stock units which vest based on both financial performance criteria and individual strategic goals (“Strategic Performance Award”). The Financial Performance RSUs will be earned based on the achievement of revenue and modified non-GAAP operating income that have been established at “threshold,” “target” and “maximum” levels. Each Financial Performance RSU will vest 50% on the first anniversary of the commencement date based on achievement of fiscal 2015 financial performance criteria and 50% on the second anniversary of the vesting commencement date based on the achievement of fiscal 2016 financial performance criteria. The Strategic Performance Awards will vest based on achievement at the threshold level of either the revenue or modified non-GAAP operating income objective established for the Financial Performance RSU, in addition to the achievement of additional individual strategic goals. Each Strategic Performance Award will vest 50% on the first anniversary of the commencement date based on achievement of fiscal 2015 individual strategic goals and 50% on second anniversary date based on the achievement of the fiscal 2016 individual strategic goals.

In June 2014, the Company granted performance-based RSU (“PSUs”) to certain members of senior management. Pursuant to the PSUs, each eligible employee is entitled to vest in a certain number of shares based on such employee’s achievement of individual financial and strategic performance goals for fiscal 2015, including, for example, net revenue and operating expense targets, and other individual strategic milestones. The actual number of shares that vest for each eligible employee is based on the achievement of such performance goals determined at the end of fiscal 2015 and vest over two years, with 50% vesting on April 1, 2015 and 50% vesting on April 1, 2016.

2007 Directors’ Stock Incentive Plan

In October 2007, the Company adopted the 2007 Directors’ Stock Incentive Plan, (“2007 Director Plan”) for which shareholders approved a total of 750,000 common shares that could be issued under the plan to all eligible outside directors. Beginning in fiscal 2015, each outside director is eligible to receive equity awards under the 2007 Director Plan. Upon election or appointment at the annual general meeting of shareholders, each outside director will be granted an RSU award for a number of shares with an aggregate fair market value equal to $220,000 immediately following each annual general meeting of shareholders. The RSU award vests 100% on the earlier of the date of the next annual general meeting of shareholders or the one-year anniversary of the date of grant. An outside director who is elected or appointed after an annual general meeting of shareholders will receive a pro rata RSU award based on the number of quarters completed since the prior annual general meeting of shareholders. In no event shall any outside director be awarded in any calendar year an annual RSU award under the 2007 Director Plan for more than 20,000 shares.

In fiscal 2014, each outside director who was appointed at the annual general meeting of shareholders was granted an option to purchase a number of common shares with an aggregate grant date fair value equal to $110,000 immediately following the annual general meeting of shareholders. In addition, each outside director who was elected or appointed at the annual general meeting of shareholders was granted an RSU award for a number of shares with an aggregate fair market value equal to $110,000 immediately following each annual general meeting. The option awards, which have a term of 10 years, and the RSU awards each vest 100% on the earlier of the date of the next annual general meeting of shareholders or the one-year anniversary of the date of grant. An outside director elected or appointed after an annual general meeting of shareholders would receive a pro rata stock option award and RSU award based on the number of quarters completed since the previous annual general meeting of shareholders. In no event would any outside director be awarded in any calendar year an annual option award or annual RSU award under the 2007 Director Plan for more than 25,000 shares and 10,000 shares, respectively. As of January 30, 2016, approximately 77,952 shares remained available for future issuance under the 2007 Directors’ Plan.

2000 Employee Stock Purchase Plan

Under the 2000 Employee Stock Purchase Plan, as amended and restated on October 31, 2011 (the “ESPP”), participants purchase the Company’s stock using payroll deductions, which may not exceed 15% of their total cash compensation. Pursuant to the terms of the current ESPP, the “look-back” period for the stock purchase price is 24 months. Offering and purchase periods begin on December 8 and June 8 of each year. Participants enrolled in a 24-month offering period will continue in that offering period until the earlier of the end of the offering period or the reset of the offering period. A reset occurs if the fair market value of the Company’s common shares on any purchase date is less than it was on the first day of the offering period. Participants in a 24-month offering period will be granted the right to purchase common shares at a price per share that is 85% of the lesser of the fair market value of the shares at (i) the participant’s entry date into the two-year offering period or (ii) the end of each six-month purchase period within the offering period.

Under the ESPP, a total of 5.9 million shares were issued in fiscal 2016 at a weighted-average price of $10.00 per share, a total of 9.7 million shares were issued in fiscal 2015 at a weighted-average price of $7.67 per share and a total of 9.7 million shares were issued in fiscal 2014 at a weighted-average price of $7.39 per share. As of January 30, 2016, there was $47.4 million of unamortized compensation cost related to the ESPP.

As of January 30, 2016, approximately 16.6 million shares remained available for future issuance under the ESPP.

Option Plan and Stock Award Activity

Stock option activity under the Company’s stock option and stock incentive plans is included in the following table (in thousands, except for per share amounts):


	Time-Based Options					Market-Based Options					Total
	Number of Shares			Weighted Average Exercise Price		Number of Shares			Weighted Average Exercise Price		Number of Shares			Weighted Average Exercise Price
Balance at February 2, 2013		49,637		$	13.28		2,759		$	15.43		52,396		$	13.39
Granted		18,922		$	10.82		—			—		18,922		$	10.82
Exercised		(15,482	)	$	9.40		—			—		(15,482	)	$	9.40
Canceled/Forfeited		(3,921	)	$	15.15		(136	)	$	15.43		(4,057	)	$	15.16

Balance at February 1, 2014		49,156		$	13.40		2,623		$	15.43		51,779		$	13.51
Granted		6,365		$	15.33		—			—		6,365		$	15.33
Exercised		(3,732	)	$	10.19		—			—		(3,732	)	$	10.19
Canceled/Forfeited		(4,649	)	$	14.66		(391	)	$	15.43		(5,040	)	$	14.72

Balance at January 31, 2015		47,140		$	13.79		2,232		$	15.43		49,372		$	13.88
Granted		6,170		$	14.13		—			—		6,170		$	14.13
Exercised		(2,225	)	$	9.79		—			—		(2,225	)	$	9.79
Canceled/Forfeited		(10,211	)	$	15.68		(76	)	$	15.43		(10,287	)	$	15.68

Balance at January 30, 2016		40,874		$	13.59		2,156		$	15.43		43,030		$	13.68

Vested or expected to vest at January 30, 2016		38,773		$	13.58

For time-based stock options vested and expected to vest at January 30, 2016, the aggregate intrinsic value was $6.7 million. For time-based stock options exercisable at January 30, 2016, the aggregate intrinsic value was $6.6 million. The aggregate intrinsic value of stock options exercised during fiscal 2016, 2015 and 2014 was $9.7 million, $19.3 million and $51.1 million, respectively. There was no aggregate intrinsic value for market-based stock options at January 30, 2016 and the weighted average remaining contractual term of market-based stock options vested and expected to reach the end of the vesting period at January 30, 2016 was 5.2 years. The Company’s closing stock price of $8.85 as reported on the NASDAQ Global Select Market as of January 29, 2016 was used to calculate the aggregate intrinsic value for all in-the-money options.

As of January 30, 2016, outstanding options and exercisable options information, by range of exercise prices, was as follows:


		Outstanding Options						Exercisable Options
Range of Exercise Prices		Number of Shares (in Thousands)		Weighted Average Remaining Contractual Term (in Years)		Weighted Average Exercise Price		Number of Shares (in Thousands)		Weighted Average Exercise Price
$ 5.70	$ 9.49		3,673		3.38	$	7.04		3,386	$	6.89
$10.31	$10.76		11,574		7.09	$	10.76		3,570	$	10.76
$10.80	$14.35		9,275		6.60	$	13.25		3,661	$	12.06
$14.45	$15.43		9,842		6.07	$	15.16		4,843	$	15.26
$15.43	$34.38		8,666		3.80	$	19.18		5,763	$	20.85

Total			43,030		5.77	$	13.68		21,223	$	14.13

As of January 30, 2016, the unamortized compensation expense for time-based stock options was $38.2 million and market-based stock options were fully amortized in fiscal 2014. The unamortized compensation expense for time-based options will be amortized on a straight-line basis and is expected to be recognized over a weighted-average period of 1.9 years.

Activity related to the non-vested portion of the restricted stock units is included in the following table (in thousands, except for share prices):


	Time-Based					Performance-Based					Market-Based					Total
	Number of Shares			Weighted Average Grant Date Fair Value		Number of Shares			Weighted Average Grant Date Fair Value		Number of Shares			Weighted Average Grant Date Fair Value		Number of Shares			Weighted Average Grant Date Fair Value
Balance at February 2, 2013		12,739		$	15.78												12,739		$	15.78
Granted		3,728		$	10.79		100		$	10.52							3,828		$	10.78
Vested		(3,925	)	$	16.19		—			—							(3,925	)	$	16.19
Canceled/Forfeited		(1,288	)	$	14.39		—			—							(1,288	)	$	14.39

Balance at February 1, 2014		11,254		$	14.14		100		$	10.52							11,354		$	14.11
Granted		5,534		$	15.20		1,277	*	$	14.98							6,811		$	15.16
Vested		(5,938	)	$	13.96		(3	)	$	10.52							(5,941	)	$	13.96
Canceled/Forfeited		(1,102	)	$	14.32		(120	)	$	11.23							(1,222	)	$	14.02

Balance at January 31, 2015		9,748		$	14.84		1,254		$	14.99							11,002		$	14.85
Granted		5,689		$	12.88		669	*	$	14.08		407	*	$	12.24		6,765		$	12.96
Vested		(5,139	)	$	15.06		(658	)	$	15.15		—			—		(5,797	)	$	15.07
Canceled/Forfeited		(1,955	)	$	13.99		(288	)	$	14.39		(54	)	$	12.24		(2,297	)	$	14.00

Balance at January 30, 2016		8,343		$	13.57		977		$	14.43		353					9,673		$	13.61

*	Amounts represent the target number of restricted stock units at grant date. For awards granted to our executive officers, up to 200% of the target restricted stock units may vest if the maximum level for financial and strategic goals is achieved.

In connection with the performance-based equity awards granted in fiscal 2016 to each of the Company’s executive officers, a total of 33,616 shares vested on April 1, 2016 based on achieving certain individual strategic goals as evaluated by the Executive Compensation Committee of the Company’s Board of Directors. No shares vested for the achievement of financial performance goals since the financial performance criteria were below the threshold level. The amount of canceled shares reported in the table above includes the unvested shares that were not earned.

In connection with the performance-based equity awards granted in fiscal 2015 to each of the Company’s executive officers, a total of 478,001 shares vested on April 1, 2015 in connection with the first performance period completed at the end of fiscal 2015. Of this amount, an additional 107,954 shares are included as granted in the table above for fiscal 2015 since each executive officer achieved greater than their target shares for one of the financial performance goals. The amount of canceled shares reported in the table above includes the portion of unvested shares that were not earned since performance objectives for each executive officer’s other financial and strategic performance goals were not fully achieved. No shares will be issued in connection with the second performance period since the financial and strategic performance goals for fiscal 2016 were not achieved.

In connection with the PSUs granted in fiscal 2015 to certain members of senior management, final evaluation for each individual’s achievement of their performance was measured in the first quarter of fiscal 2016. As a result, a total of 360,723 shares vested on April 1, 2015 and are included in the above table. There was no material adjustment to share-based compensation expense related to these performance-based restricted stock units in fiscal 2016. The amount of canceled shares reported in the table above includes the portion of unvested shares that were not earned since certain performance achievements were not fully achieved.

The aggregate intrinsic value of restricted stock units expected to vest as of January 30, 2016 was $81.7 million. The number of restricted stock units that are expected to vest is 9.2 million shares.

As of January 30, 2016, unamortized compensation expense related to restricted stock units was $53.2 million. The unamortized compensation expense for restricted stock units will be amortized on a straight-line basis and is expected to be recognized over a weighted-average period of 1.0 years.

Share-Based Compensation

The following table presents details of share-based compensation expenses by functional line item (in thousands):


	Year Ended
	January 30, 2016		January 31, 2015		February 1, 2014
Cost of goods sold	$	7,916	$	7,972	$	8,863
Research and development		98,792		94,432		109,432
Selling and marketing		11,106		11,469		13,940
General and administrative		15,965		23,373		23,638

	$	133,779	$	137,246	$	155,873

Share-based compensation capitalized in inventory was $1.5 million at January 30, 2016, $1.5 million at January 31, 2015, and $1.7 million at February 1, 2014.

Upon the termination of certain members of our executive management in April 2016, it was determined that the vesting in certain of their unvested stock awards was not probable. As a result, the Company recorded a reversal of the previously recognized related share-based compensation expense in the first quarter of fiscal 2017.

Valuation Assumptions

The expected volatility for awards granted during fiscal 2016, 2015, and 2014 was based on an equally weighted combination of historical stock price volatility and implied volatility derived from traded options on the Company’s stock in the marketplace. The Company believes that the combination of historical volatility and implied volatility provides a better estimate of future stock price volatility.

The expected dividend yield is calculated by dividing the current annualized dividend by the closing stock price on the date of grant of the option.

The following weighted average assumptions were used for each respective period to calculate the fair value of each time-based stock option award on the date of grant using the Black-Scholes option pricing model and of each market-based stock option award using a Monte Carlo simulation model:


	Year Ended
	January 30, 2016			January 31, 2015			February 1, 2014
Time-based Stock Options:
Weighted average fair value	$	3.93		$	4.35		$	3.43
Expected volatility		34	%		35	%		45	%
Expected term (in years)		5.4			5.0			5.0
Risk-free interest rate		1.6	%		1.6	%		0.8	%
Expected dividend yield		1.8	%		1.6	%		2.4	%

There have been no market-based stock option grants since fiscal 2012, when the Company issued 3.1 million stock options with a market-based condition for a group of senior employees. The market price conditions were not met within the five years from date of grant and these stock options automatically expired in April 2016. The fair value of each market-based stock option award was estimated on the date of grant using a Monte Carlo simulation model that uses assumptions as then determined, including the same volatility applied to the Company’s time-based options that were granted in the same period. Because a Monte Carlo simulation model incorporates ranges of assumptions for inputs, those ranges are disclosed where applicable. The Company uses historical data to estimate employee termination within the valuation model. The expected term was 2.66 years for market-based stock options granted in fiscal 2012 and was derived from the output of the valuation model and represents the period of time that options granted are expected to be outstanding.


	Year Ended
	January 30, 2016			January 31, 2015			February 1, 2014
Employee Stock Purchase Plan:
Estimated fair value	$	3.24		$	4.10		$	3.65
Expected volatility		41	%		30	%		37	%
Expected term (in years)		1.3			1.3			1.3
Risk-free interest rate		0.6	%		0.3	%		0.2	%
Expected dividend yield		2.4	%		1.6	%		2.0	%


	Year Ended
	January 30, 2016
Total Shareholder Return Awards:
Expected term (in years)		2.0
Expected volatility		27	%
Average correlation coefficient of peer companies		0.4	%
Risk-free interest rate		0.5	%
Expected dividend yield		1.7	%

The correlation coefficients are calculated based upon the price data used to calculate the historical volatilities and is used to model the way in which each entity tends to move in relation to its peers.

Share Repurchase Program

The Company’s board of directors initially authorized its current share repurchase program to repurchase up to $500 million of its outstanding common shares in August 2010. Since then, the Company’s board of directors has authorized an additional $2.75 billion for a total available under the program of $3.25 billion to be used to repurchase its common shares. The Company intends to effect share repurchases in accordance with the conditions of Rule 10b-18 under the Exchange Act but may also make repurchases in the open market outside of Rule 10b-18 or in privately negotiated transactions. The share repurchase program will be subject to market conditions and other factors, and does not obligate the Company to repurchase any dollar amount or number of its common shares and the repurchase program may be extended, modified, suspended or discontinued at any time.

The Company repurchased 19.7 million of its common shares for $260.9 million, 5.1 million of its common shares for $65.0 million and 33.1 million of its common shares for $354.1 million in cash during fiscal 2016, 2015 and 2014, respectively. All of the repurchased shares were retired immediately after the repurchases were completed. The Company records all repurchases, as well as investment purchases and sales, based on their trade date. As of January 30, 2016, a total of 241.6 million shares have been repurchased to date under the Company’s share repurchase program for a total $3.1 billion in cash and there was $182.6 million remaining available for future share repurchases. The Company has made no subsequent share repurchases since its third quarter of fiscal 2016.

Dividends


	Year Ended
	January 30, 2016		January 31, 2015		February 1, 2014
Cash dividend per share	$	0.24	$	0.24	$	0.24

Total payment to shareholders (in thousands)	$	122,821	$	122,801	$	119,449

On March 16, 2016, the Company announced that its board of directors declared a cash dividend of $0.06 per share that was paid on April 22, 2016 to shareholders of record as of March 29, 2016 and on May 18, 2016, it announced that its board of directors declared a cash dividend of $0.06 per share that was paid on July 12, 2016 to shareholders of record as of June 14, 2016.

- Definition

The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(d),(e))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21484-112644

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB TOPIC 4.E)
-URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74512-122707

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21488-112644

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.29-31)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SAB TOPIC 4.C)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187143-122770

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21506-112644

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6521494

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-Number Topic 4
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Reference 15: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 4
-Section C

+ Details

Segment and Geographic Information

12 Months Ended

Jan. 30, 2016

Segment and Geographic Information

Note 13 — Segment and Geographic Information

The Company operates in one reportable segment — the design, development and sale of integrated circuits. The chief executive officer was identified as the chief operating decision maker (“CODM”) for the years ended January 30, 2016, January 31, 2015 and February 1, 2014. The Company’s CODM is ultimately responsible and actively involved in the allocation of resources and the assessment of the Company’s performance. The fact that the Company operates in only one reportable segment is based on the following:

•

The Company uses a highly-integrated approach in developing its products in that discrete technologies developed by the Company are frequently integrated across many of its products. Substantially all of the Company’s integrated circuits are manufactured under similar manufacturing processes.

•

The Company’s organizational structure is based along functional lines. Each of the functional department heads reports directly to the CODM. Shared resources in the Company also report directly to the CODM or to a direct report of the CODM.

•

The assessments of performance across the Company, including assessment of the Company’s incentive compensation plan, are based largely on operational performance and consolidated financial performance.

•

The decisions on allocation of resources and other operational decisions are made by the CODM based on his hands-on involvement with the Company’s operations and product development.

The following tables present net revenue and long-lived asset information based on geographic region. Net revenue is based on the destination of the shipments and long-lived assets are based on the physical location of the assets (in thousands):


	Year Ended
	January 30, 2016		January 31, 2015		February 1, 2014
Net Revenue:
United States	$	42,854	$	62,333	$	68,321
China		1,569,147		2,214,876		1,869,381
Thailand		189,299		294,706		353,363
Malaysia		302,953		377,903		352,756
Philippines		211,602		254,381		257,899
Others		409,973		502,764		502,680

	$	2,725,828	$	3,706,963	$	3,404,400


	January 30, 2016		January 31, 2015
Property and equipment, net:
Bermuda	$	3,093	$	3,358
China		22,917		25,910
Israel		15,069		26,728
Singapore		69,241		79,216
United States		173,537		186,321
Others		15,683		19,106

	$	299,540	$	340,639

The following table presents net revenue by end market (in thousands):


	Year Ended
	January 30, 2016		January 31, 2015		February 1, 2014
Net Revenue by End Market
Storage	$	1,201,378	$	1,744,656	$	1,681,953
Mobile and Wireless		786,239		1,071,777		839,407
Networking		551,743		674,701		670,249
Other		186,468		215,829		212,791

	$	2,725,828	$	3,706,963	$	3,404,400

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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Reference 14: http://www.xbrl.org/2003/role/presentationRef
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+ Details

Related Party Transactions

12 Months Ended

Jan. 30, 2016

Related Party Transactions

Note 14 — Related Party Transactions

MIL is party to a technology license agreement with VeriSilicon Holdings Co., Ltd. (“VeriSilicon”). MIL assumed the technology license agreement between VeriSilicon and UTStarcom, Inc. after the Company’s acquisition of the semiconductor business of UTStarcom in December 2005. MIL has subsequently entered into various addenda to the agreement for additional technology beyond the scope of the original agreement. In addition, in September 2010, MIL entered into a services agreement with VeriSilicon, pursuant to which VeriSilicon has agreed to provide design support services to MIL. Under the services agreement, VeriSilicon helped on three projects for MIL during fiscal 2013. In connection with all of its transactions with VeriSilicon, MIL paid $1.8 million, $3.7 million and $2.0 million to VeriSilicon during fiscal 2016, 2015 and 2014, respectively. As of January 30, 2016, the Company had $0.3 million of liability to VeriSilicon. Weili Dai’s brother (and Dr. Sehat Sutardja’s brother-in-law) Wayne Dai, is the Chairman, President and Chief Executive Officer of VeriSilicon. Ms. Dai and Dr. Sutardja are also shareholders of VeriSilicon. Ms. Dai was the President of the Company and Dr. Sehat Sutardja was the Company’s Chief Executive Officer until their departures in April 2016 (see “Note 15 — Subsequent Events”), and continue to serve as members of the Company’s Board of Directors. Dr. Sehat Sutardja and Ms. Dai are husband and wife.

In December 2009, MIL entered into a technology license agreement with Vivante Corporation (“Vivante”) that provides for the license of graphics technology and associated services. This agreement restates, expands and succeeds previous agreements between the parties for the same technology. In December 2012, the parties renewed this technology license agreement for another three years. The total amount of the license fee was approximately $13.0 million (to be paid over three years) and ten percent for support fees (to be paid over three years). In February 2012, the parties entered into a separate services agreement, pursuant to which Vivante agreed to provide support services to MIL. In connection with all of its transactions with Vivante, MIL paid $4.0 million, $9.1 million and $6.9 million to Vivante during fiscal 2016, 2015 and 2014, respectively. As of January 30, 2016, the Company had $1.5 million of liability to Vivante. As a result of their ownership of and control of Estopia LLC and their existing shareholdings, Dr. Sutardja and Ms. Dai are now direct and indirect shareholders of VeriSilicon. In addition, as a result of the acquisition of Vivante by VeriSilicon in late 2015, Ms. Dai’s brother Weijin Dai, who was the Chief Executive Officer and member of the board of directors of Vivante is now an executive officer and board member of VeriSilicon. Dr. Sutardja, who was Chairman of the board of directors of Vivante, is not on the board of directors of VeriSilicon.

In February 2015, the Executive Compensation Committee (“Committee”) of the Company’s Board of Directors approved a cash payment of approximately $15.4 million to Dr. Sehat Sutardja. The U.S. Court of Federal Claims ruled against Dr. Sutardja in his legal challenge with the Internal Revenue Service and the California Franchise Tax Board related to the tax treatment of several stock options granted in fiscal 2004. After discussing and evaluating the alternatives to a continuing legal challenge of the court’s determination, the likelihood of success of further appeal by Dr. Sutardja and the potential negative impact on the Company of a continuation of the case regardless of the outcome, the Committee determined to provide Dr. Sutardja with relief from the financial effects of the penalty taxes. Accordingly, the Committee approved the cash payment to Dr. Sutardja equal to the amount of his penalty taxes owed under the Tax Codes, plus accrued interest owed with respect to such liabilities, all grossed-up for income taxes that will be owed by Dr. Sutardja on receipt of such cash payment. The Company recorded the payment in general and administrative expense in fiscal 2016. A payment of $8.4 million was made to Dr. Sutardja in fiscal 2016 representing reimbursement for the U.S. federal tax portion. As of January 30, 2016, the Company had a remaining $7.0 million liability to Dr. Sutardja.

- Definition

The entire disclosure for related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.

+ References + Details

Subsequent Events

12 Months Ended

Jan. 30, 2016

Subsequent Events

Note 15 — Subsequent Events

In April 2016, the employment of Dr. Sehat Sutardja as Chief Executive Officer and Weili Dai as President was terminated by the Company’s Board of Directors. Dr. Sutardja and Ms. Dai remain on the Board of Directors at this time. The Board of Directors then formed an Interim Office of the Chief Executive and appointed Maya Strelar-Migotti, Executive Vice President of the Smart Networked Devices and Solutions Business Group, and Dr. Pantelis Alexopoulos, Executive Vice President of the Storage Business Group, as Interim Co-Chief Executive Officers, each having the authority to exercise all powers of the Chief Executive Officer. In June 2016, the Board of Directors appointed Matthew J. Murphy to serve as the Company’s President and Chief Executive Officer, effective July 11, 2016. Upon the commencement of Mr. Murphy’s employment, Ms. Strelar-Migotti and Dr. Alexopoulos returned to their roles as Executive Vice Presidents of the Company. The Board subsequently appointed Richard S. Hill, the Chairman of the Board, as the Company’s Interim Principal Executive Officer, to serve in that capacity until the Company files its Quarterly Report on Form 10-Q for the second quarter of fiscal 2017 (“Q217 Form 10-Q”). Mr. Murphy will assume the role of the Company’s principal executive officer immediately following the filing of the Q217 Form 10-Q. Mr. Murphy also joined the Board of Directors on July 11, 2016.

Also in April 2016, the Company announced that it entered into an agreement with Starboard Value LP (“Starboard”), regarding the composition of its Board of Directors. Under the terms of the agreement, the Company elected Peter A. Feld, Richard S. Hill, Oleg Khaykin, Michael Strachan and Robert Switz to serve on its board. Mr. Hill replaced Dr. Sutardja as the Chairman of the Board in May 2016. The agreement specifies that the Board will recommend and the Company will support and solicit proxies only for the election at the 2016 annual general meeting of Messrs. Feld, Hill, Khaykin, Murphy, Strachan and Switz and the four independent directors serving on the Board immediately prior to the execution of the agreement, Dr. Gromer, Dr. Kassakian, Mr. Krueger and Dr. Thakur.

In February 2016, the Company and CMU settled their patent infringement lawsuit pursuant to a court-ordered mediation and entered into a Settlement Agreement and Patent License (the “Agreement”). The parties agreed to mutual release of claims, license and covenant not to sue provisions for which the Company will pay an aggregate of $750 million to CMU. See CMU litigation under “Note 10 — Commitments and Contingencies” for further information about the lawsuit.

The Agreement was accounted for as a multiple-element arrangement and accordingly, a valuation was completed to determine the estimated fair value of each identifiable element. As a result, the Company allocated $654.7 million to the mutual release of claims and covenant not to sue provisions; $81.3 million to the licensing of intellectual property in fiscal 2016; and the remaining $14.0 million representing the future use of the license through April 2018.

The $654.7 million for the mutual release of claims and covenant not to sue was recorded in fiscal 2016 as a settlement charge in operating expenses since there is no future benefit. The $81.3 million license fee was recorded in fiscal 2016 as a charge in cost of goods sold for past use of the license. The $14.0 million representing the future use of the license, will be recognized in cost of goods sold over the remaining term of the license from February 2016 through April 2018.

The Company considers its existing cash, cash equivalents and short-term investments to be sufficient to cover payment of the $750 million settlement, and in April 2016, the Company completed full payment of the $750 million to CMU.

Supplementary Data (Unaudited)

12 Months Ended

Jan. 30, 2016

Supplementary Data (Unaudited)

MARVELL TECHNOLOGY GROUP LTD.

SUPPLEMENTARY DATA

(Unaudited)

The following table presents the unaudited consolidated statements of operations data for each of the eight quarters in the period ended January 30, 2016. In management’s opinion, this information has been presented on the same basis as the audited consolidated financial statements included in a separate section of this Annual Report on Form 10-K, and all necessary adjustments, consisting only of normal recurring adjustments, have been included in the amounts below to fairly state the unaudited quarterly results when read in conjunction with the audited consolidated financial statements and related notes. The operating results for any period should not be considered indicative of results to be expected in any future period. The Company expects the quarterly operating results to fluctuate in future periods due to a variety of reasons, including those discussed in Part I, Item 1A “Risk Factors.”


	Fiscal 2016
	First Quarter (1)		Second Quarter (2)			Third Quarter (3)			Fourth Quarter (4)
	(In thousands, except per share amounts)
Net revenue	$	724,288	$	710,492		$	674,890		$	616,158
Gross profit	$	373,135	$	248,773		$	295,636		$	313,548
Net income (loss)	$	14,090	$	(771,940	)	$	(57,750	)	$	4,200
Net income (loss) per share:
Basic	$	0.03	$	(1.49	)	$	(0.11	)	$	0.01
Diluted	$	0.03	$	(1.49	)	$	(0.11	)	$	0.01

	Fiscal 2015
	First Quarter (5)		Second Quarter (6)			Third Quarter (7)			Fourth Quarter (8)
	(In thousands, except per share amounts)
Net revenue	$	957,830	$	961,545		$	930,136		$	857,452
Gross profit	$	463,970	$	483,804		$	475,162		$	440,321
Net income	$	99,479	$	138,870		$	115,304		$	81,693
Net income per share:
Basic	$	0.20	$	0.27		$	0.22		$	0.16
Diluted	$	0.19	$	0.27		$	0.22		$	0.16

(1)

The first quarter of fiscal 2016 includes a charge for a cash payment authorized by our Board of Directors of $15.4 million to Dr. Sehat Sutardja (see “Note 14 — Related Party Transactions” in the Notes to the Consolidated Financial Statements) and $2.9 million of costs for the surety bonds related to the litigation with CMU.

(2)

The second quarter of fiscal 2016 includes a $745.6 million charge for litigation matters recognized by the Company including the settlement reached with CMU (see “Note 15 — Subsequent Events” in the Notes to the Consolidated Financial Statements) and certain other pending litigation, $13.0 million of restructuring and other related charges, and $2.7 million of costs for the surety bonds related to the litigation with CMU.

(3)

The third quarter of fiscal 2016 includes $45.5 million of restructuring and other related charges that include $8.0 million for the write down of inventory and $6.2 million for the impairment of equipment and other assets due to the restructuring of the mobile platform business, and $2.9 million of costs for the surety bonds related to the litigation with CMU.

(4)

The fourth quarter of fiscal 2016 includes $4.4 million of restructuring and other related charges, $3.8 million related to the settlement of litigation matters including a charge for the settlement reached with CMU (see “Note 15 — Subsequent Events” in the Notes to the Consolidated Financial Statements) and $2.9 million of costs for the surety bonds related to the litigation with CMU.

(5)	The first quarter of fiscal 2015 includes $8.5 million of restructuring and other exit-related costs that includes a $3.4 million write-off of IPR&D.

(6)	The second quarter of fiscal 2015 includes an $8.8 million gain from the sale of an investment and $2.2 million of costs for the surety bonds related to the litigation with CMU.

(7)	The third quarter of fiscal 2015 includes $2.3 million of costs for the surety bonds related to the litigation with CMU.

(8)	The fourth quarter of fiscal 2015 includes $3.4 million of restructuring and other exit-related costs, and $2.8 million of costs for the surety bonds related to the litigation with CMU.

SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS

12 Months Ended

Jan. 30, 2016

SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS

SCHEDULE II

VALUATION AND QUALIFYING ACCOUNTS

(in thousands)


	Balance at Beginning of Year		Additions		Deductions			Balance at End of Year
Fiscal year ended January 30, 2016
Allowance for doubtful accounts and sales return reserve	$	2,112	$	2,614	$	(1,964	)	$	2,762

Deferred tax valuation allowance	$	382,796	$	42,118	$	—		$	424,914

Fiscal year ended January 31, 2015
Allowance for doubtful accounts and sales return reserve	$	2,294	$	3,041	$	(3,223	)	$	2,112

Deferred tax valuation allowance	$	335,890	$	46,906	$	—		$	382,796

Fiscal year ended February 1, 2014
Allowance for doubtful accounts and sales return reserve	$	7,921	$	3,808	$	(9,435	)	$	2,294

Deferred tax valuation allowance	$	299,449	$	36,441	$	—		$	335,890

The Company and its Significant Accounting Policies (Policies)

12 Months Ended

Jan. 30, 2016

Basis of Presentation

Basis of Presentation

Use of Estimates

Use of Estimates

Principles of Consolidation

Principles of Consolidation

Cash and Cash Equivalents

Cash and Cash Equivalents

Investments

Investments

•

the Company has the intent to sell the security;

•

it is more likely than not that the Company will be required to sell the security before recovery of its amortized cost base; or

•

a credit loss exists insofar as the Company does not expect to recover the entire recognized amortized cost of the security.

Impairment of Investments

Impairment of Investments

Derivative Financial Instruments

Derivative Financial Instruments

Concentration of Credit Risk and Significant Customers

Concentration of Credit Risk and Significant Customers

Inventories

Inventories

Property and Equipment, Net

Property and Equipment, Net

Goodwill

Goodwill

Long-Lived Assets and Intangible Assets

Long-Lived Assets and Intangible Assets

Foreign Currency Transactions

Foreign Currency Transactions

Revenue Recognition

Revenue Recognition

The Company recognizes revenue when there is persuasive evidence of an arrangement, delivery has occurred, the fee is fixed or determinable, and collection is reasonably assured.

Advertising Expense

Advertising Expense

Share-Based Compensation

Share-Based Compensation

The fair value of each restricted stock unit is estimated based on the market price of the Company’s common shares on the date of grant less the expected dividend yield.

Comprehensive Income (Loss)

Comprehensive Income (Loss)

Accounting for Income Taxes

Accounting for Income Taxes

Warranty

Warranty

Recent Accounting Pronouncements

Recent Accounting Pronouncements

Accounting Pronouncements Recently Adopted

Accounting Pronouncements Not Yet Effective

Investments (Tables)

12 Months Ended

Jan. 30, 2016

Schedule of Available-for-sale Securities Reconciliation

The following tables summarize the Company’s investments (in thousands):


	January 30, 2016
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Short-term investments:
Available-for-sale:
Corporate debt securities	$	558,337	$	766	$	(1,282	)	$	557,821
U.S. government and agency debt		317,595		64		(254	)		317,405
Asset backed securities		76,711		81		(56	)		76,736
Foreign government and agency debt		21,370		2		(14	)		21,358
Municipal debt securities		31,211		45		(7	)		31,249

Total short-term investments		1,005,224		958		(1,613	)		1,004,569
Long-term investments:
Available-for-sale:
Auction rate securities		11,296		—		—			11,296

Total long-term investments		11,296		—		—			11,296

Total investments	$	1,016,520	$	958	$	(1,613	)	$	1,015,865


	January 31, 2015
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Short-term investments:
Available-for-sale:
Corporate debt securities	$	983,008	$	3,872	$	(563	)	$	986,317
U.S. government and agency debt		178,898		265		(7	)		179,156
Asset backed securities		91,432		108		(9	)		91,531
Foreign government and agency debt		28,051		61		(2	)		28,110
Municipal debt securities		33,421		47		(4	)		33,464

Total short-term investments		1,314,810		4,353		(585	)		1,318,578
Long-term investments:
Available-for-sale:
Auction rate securities		12,500		—		(2,274	)		10,226

Total long-term investments		12,500		—		(2,274	)		10,226

Total investments	$	1,327,310	$	4,353	$	(2,859	)	$	1,328,804

Gross Realized Gains and Losses on Sales of Available-for-Sale Securities

Gross realized gains and gross realized losses on sales of available-for-sale securities are presented in the following table (in thousands):


	Year Ended
	January 30, 2016			January 31, 2015			February 1, 2014
Gross realized gains	$	1,654		$	1,618		$	1,567
Gross realized losses		(1,923	)		(169	)		(268	)
Impairment loss		(1,204	)		—			—

Total net realized gains (losses)	$	(1,473	)	$	1,449		$	1,299

Investments Classified by Contractual Maturity Date

The contractual maturities of available-for-sale securities are presented in the following table (in thousands):


	January 30, 2016				January 31, 2015
	Amortized Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value
Due in one year or less	$	304,117	$	304,035	$	361,108	$	361,396
Due between one and five years		689,847		689,279		950,702		954,151
Due over five years		22,556		22,551		15,500		13,257

	$	1,016,520	$	1,015,865	$	1,327,310	$	1,328,804

Unrealized Loss Position Investments


	January 30, 2016
	Less than 12 months					12 months or more					Total
	Fair Value		Unrealized Loss			Fair Value		Unrealized Loss			Fair Value		Unrealized Loss
Corporate debt securities	$	283,138	$	(1,237	)	$	14,383	$	(45	)	$	297,521	$	(1,282	)
U.S. government and agency debt		263,325		(254	)		—		—			263,325		(254	)
Asset backed securities		46,646		(56	)		—		—			46,646		(56	)
Foreign government and agency debt		16,458		(14	)		—		—			16,458		(14	)
Municipal debt securities		2,943		(5	)		1,571		(2	)		4,514		(7	)

Total securities	$	612,510	$	(1,566	)	$	15,954	$	(47	)	$	628,464	$	(1,613	)


	January 31, 2015
	Less than 12 months					12 months or more					Total
	Fair Value		Unrealized Loss			Fair Value		Unrealized Loss			Fair Value		Unrealized Loss
Corporate debt securities	$	243,699	$	(558	)	$	2,005	$	(5	)	$	245,704	$	(563	)
U.S. government and agency debt		32,165		(7	)		—		—			32,165		(7	)
Asset backed securities		25,053		(9	)		—		—			25,053		(9	)
Foreign government and agency debt		2,999		(2	)		—		—			2,999		(2	)
Municipal debt securities		2,845		(4	)		—		—			2,845		(4	)
Auction rate securities		—		—			10,226		(2,274	)		10,226		(2,274	)

Total securities	$	306,761	$	(580	)	$	12,231	$	(2,279	)	$	318,992	$	(2,859	)

Supplemental Financial Information (Tables)

12 Months Ended

Jan. 30, 2016

Schedule of Cash and Cash Equivalents


	January 30, 2016		January 31, 2015
Cash and cash equivalents:
Cash	$	669,312	$	864,680
Cash equivalents:
Time deposits		209,405		213,012
U.S. government and agency debt		184,374		—
Corporate debt securities		54,689		21,999
Money market funds		160,400		111,286

Cash and cash equivalents	$	1,278,180	$	1,210,977

Schedule of Inventories


	January 30, 2016		January 31, 2015
Inventories:
Work-in-process	$	131,471	$	183,869
Finished goods		78,546		124,293

Inventories	$	210,017	$	308,162

Schedule of Property, Plant and Equipment, Net


	January 30, 2016			January 31, 2015
Property and equipment, net:
Machinery and equipment	$	578,627		$	601,961
Buildings		144,320			144,320
Computer software		102,928			99,312
Land		53,373			53,373
Building improvements		49,927			49,753
Leasehold improvements		50,192			51,434
Furniture and fixtures		27,119			27,883
Construction in progress		1,353			6,167

		1,007,839			1,034,203
Less: Accumulated depreciation		(708,299	)		(693,564	)

Property and equipment, net	$	299,540		$	340,639

Schedule of Other Non-current Assets


	January 30, 2016		January 31, 2015
Other non-current assets:
Technology and other licenses	$	48,770	$	61,217
Deferred tax assets		34,505		22,273
Investments in privately-held companies		5,804		9,267
Prepaid land use rights		13,123		13,432
Deposits		51,512		7,903
Other		10,996		14,747

Other non-current assets	$	164,710	$	128,839

Schedule of Accrued Liabilities


	January 30, 2016		January 31, 2015
Accrued liabilities:
Accrued rebates	$	41,320	$	39,105
Accrued royalties		16,217		24,680
Technology license obligations		17,985		14,428
Accrued legal expense		9,761		8,327
Accrued litigation		3,830		1,700
Other		42,947		43,148

Accrued liabilities	$	132,060	$	131,388

Schedule of Deferred Income


	January 30, 2016			January 31, 2015
Deferred income:
Net deferred revenue	$	77,935		$	98,444
Deferred cost of goods sold		(22,213	)		(30,324	)

Deferred income	$	55,722		$	68,120

Schedule of Other Non-current Liabilities


	January 30, 2016		January 31, 2015
Other non-current liabilities:
Technology license obligations	$	12,461	$	16,468
Long-term accrued employee compensation		6,078		4,610
Other		8,424		11,115

Other non-current liabilities	$	26,963	$	32,193

Changes in Accumulated Other Comprehensive Income (Loss) by Components

The changes in accumulated other comprehensive income (loss) by components are presented in the following tables (in thousands):


	Unrealized Gain (Loss) on Marketable Securities			Unrealized Gain (Loss) on Auction Rate Securities			Unrealized Gain (Loss) on Cash Flow Hedges			Total
Balance at February 1, 2014	$	2,534		$	(2,871	)	$	934		$	597
Other comprehensive income (loss) before reclassifications		2,479			85			(2,338	)		226
Amounts reclassified from accumulated other comprehensive income		(1,245	)		512			218			(515	)

Net current-period other comprehensive income (loss), net of tax		1,234			597			(2,120	)		(289	)

Balance at January 31, 2015		3,768			(2,274	)		(1,186	)		308
Other comprehensive income (loss) before reclassifications		(3,838	)		—			1,111			(2,727	)
Amounts reclassified from accumulated other comprehensive income		(586	)		2,274			(64	)		1,624

Net current-period other comprehensive income (loss), net of tax		(4,424	)		2,274			1,047			(1,103	)

Balance at January 30, 2016	$	(656	)	$	—		$	(139	)	$	(795	)

Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) by Components

The amounts reclassified from accumulated other comprehensive income (loss) by components are presented in the following table (in thousands):


	Year Ended
Affected Line Item in the Statement of Operations	January 30, 2016			January 31, 2015			February 1, 2014
Interest and other income, net:
Available-for-sale securities:
Marketable securities	$	586		$	1,245		$	1,139
Auction rate securities		(2,274	)		(512	)		—
Operating costs and expenses:
Cash flow hedges:
Research and development		48			(198	)		3,329
Selling and marketing		(1	)		(8	)		266
General and administrative		17			(12	)		24

Total	$	(1,624	)	$	515		$	4,758

Schedule of Interest and Other Income, Net


	Year Ended
	January 30, 2016			January 31, 2015			February 1, 2014
Interest and other income, net:
Interest income	$	15,982		$	11,370		$	9,379
Net realized gain (loss) on investments		(1,473	)		1,449			1,299
Currency translation gain		6,655			1,871			8,739
Other income (loss)		(2,773	)		9,811			8,025
Interest expense		(706	)		(1,167	)		(1,876	)

	$	17,685		$	23,334		$	25,566

Schedule of Supplemental Cash Flow Information


	Year Ended
	January 30, 2016		January 31, 2015		February 1, 2014
Supplemental cash flow information:
Cash paid for interest	$	703	$	1,167	$	1,873

Cash paid for income taxes, net	$	13,363	$	15,727	$	9,385

Non-Cash Investing and Financing Activities:
Unsettled trades of available-for-sale securities	$	53,749	$	—	$	—

Purchase of intellectual property under license obligations	$	13,800	$	—	$	8,900

Unpaid purchase of property and equipment at end of year	$	9,069	$	7,083	$	7,285

Schedule of Calculation of Numerator and Denominator in Earnings Per Share

The computations of basic and diluted net income (loss) per share are presented in the following table (in thousands, except per share amounts):


	Year Ended
	January 30, 2016			January 31, 2015		February 1, 2014
Numerator:
Net income (loss)	$	(811,400	)	$	435,346	$	315,320

Denominator:
Weighted average shares — basic		510,945			511,089		496,518
Effect of dilutive securities:
Share-based awards		—			9,671		7,895

Weighted average shares — diluted		510,945			520,760		504,413

Net income (loss) per share:
Basic	$	(1.59	)	$	0.85	$	0.64
Diluted	$	(1.59	)	$	0.84	$	0.63

Anti-dilutive Potential Shares

Anti-dilutive potential shares are presented in the following table (in thousands):

Year Ended

January 30,
2016

January 31,
2015

February 1,
2014

Weighted average shares outstanding:

Share-based awards

64,420

35,636

40,504

Sales Returns and Allowances

Provision for Sales Return and Allowance


	January 30, 2016		January 31, 2015
Provision for sales returns and allowances:
Sales returns	$	1,873	$	899
Doubtful accounts		889		1,213

	$	2,762	$	2,112

Derivative Financial Instruments (Tables)

12 Months Ended

Jan. 30, 2016

Schedule of Derivative Instruments

The notional amounts of outstanding forward contracts were as follows (in thousands):


	Buy Contracts
	January 30, 2016		January 31, 2015
Israeli shekel	$	19,082	$	51,326

Information about Gains (Losses) Associated with Derivative Financial Instruments

The following table provides information about gains (losses) associated with our derivative financial instruments (in thousands):


	Location of Gains (Losses) in Statement of Operations	Amount of Gains (Losses) in Statement of Operations for the Year Ended
	Location of Gains (Losses) in Statement of Operations	January 30, 2016			January 31, 2015			February 1, 2014
Derivatives designated as cash flow hedges:
Forward contracts:	Research and development	$	(390	)	$	(1,930	)	$	3,099
	Selling and marketing		(5	)		(24	)		23
	General and administrative		(26	)		(157	)		246

		$	(421	)	$	(2,111	)	$	3,368

- Definition

Tabular disclosure of pertinent information about a derivative or group of derivatives on a disaggregated basis, such as for individual instruments, or small groups of similar instruments. May include a combination of the type of instrument, risks being hedged, notional amount, hedge designation, related hedged item, inception date, maturity date, or other relevant item.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=56946850&loc=d3e41641-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624163-113959

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=56946850&loc=d3e41678-113959

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=56946850&loc=d3e41638-113959

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5580258-113959

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5579245-113959

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624171-113959

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 25
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5579240-113959

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=56946850&loc=d3e41620-113959

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(n)(2))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

Fair Value Measurements (Tables)

12 Months Ended

Jan. 30, 2016

Fair Value, Assets and Liabilities Measured on Recurring Basis


	Fair Value Measurements at January 30, 2016
	Level 1		Level 2		Level 3		Total
Items measured at fair value on a recurring basis:
Assets
Cash equivalents:
Money market funds	$	160,400	$	—	$	—	$	160,400
Time deposits		—		209,405		—		209,405
U.S. government and agency debt		184,374		—		—		184,374
Corporate debt securities		—		54,689		—		54,689
Short-term investments:
U.S. government and agency debt		317,405		—		—		317,405
Corporate debt securities		—		557,821		—		557,821
Asset backed securities		—		76,736		—		76,736
Foreign government and agency debt		—		21,358		—		21,358
Municipal debt securities		—		31,249		—		31,249
Prepaid expenses and other current assets:
Foreign currency forward contracts		—		30		—		30
Long-term investments:
Auction rate securities		—		—		11,296		11,296
Other non-current assets:
Severance pay fund		—		678		—		678

Total assets	$	662,179	$	951,966	$	11,296	$	1,625,441

Liabilities
Accrued liabilities:
Foreign currency forward contracts	$	—	$	195	$	—	$	195


	Fair Value Measurements at January 31, 2015
	Level 1		Level 2		Level 3		Total
Items measured at fair value on a recurring basis:
Assets
Cash equivalents:
Money market funds	$	111,286	$	—	$	—	$	111,286
Time deposits		—		213,012		—		213,012
Corporate debt securities		—		21,999		—		21,999
Short-term investments:
U.S. government and agency debt		179,156		—		—		179,156
Corporate debt securities		—		986,317		—		986,317
Asset backed securities		—		91,531		—		91,531
Foreign government and agency debt		—		28,110		—		28,110
Municipal debt securities		—		33,464		—		33,464
Prepaid expenses and other current assets:
Foreign currency forward contracts		—		124		—		124
Long-term investments:
Auction rate securities		—		—		10,226		10,226
Other non-current assets:
Severance pay fund		—		1,758		—		1,758

Total assets	$	290,442	$	1,376,315	$	10,226	$	1,676,983

Liabilities
Accrued liabilities:
Foreign currency forward contracts	$	—	$	1,379	$	—	$	1,379

Summary of Change in Fair Values for Level Three Assets

The following table summarizes the change in fair values for Level 3 assets for the years ended January 30, 2016 and January 31, 2015 (in thousands):


	Level 3
Changes in fair value during the year (pre-tax):
Balance at February 1, 2014	$	16,279
Sales, redemption and settlement		(3,650	)
Transfer out		(3,000	)
Unrealized gain included in accumulated other comprehensive income		597

Balance at January 31, 2015		10,226
Impairment loss		(1,204	)
Unrealized gain included in accumulated other comprehensive income		2,274

Balance at January 30, 2016	$	11,296

Goodwill and Acquired Intangible Assets, Net (Tables)

12 Months Ended

Jan. 30, 2016

Schedule of Finite-Lived Intangible Assets by Major Class

The carrying amounts of acquired intangible assets are as follows (in thousands):


			January 30, 2016							January 31, 2015
	Range of Useful Lives		Gross Carrying Amounts		Accumulated Amortization and Write-Offs			Net Carrying Amounts		Gross Carrying Amounts		Accumulated Amortization and Write-Offs			Net Carrying Amounts
Purchased and core technology		4 - 8 years	$	35,498	$	(21,910	)	$	13,588	$	36,348	$	(16,107	)	$	20,241
Trade names		5 years		—		—			—		1,300		(828	)		472
Customer intangibles		5 - 7 years		28,600		(24,178	)		4,422		28,600		(18,615	)		9,985

Total acquired intangible assets, net			$	64,098	$	(46,088	)	$	18,010	$	66,248	$	(35,550	)	$	30,698

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense of Identified Intangibles Excluding IPR&D


Fiscal Year
2017	$	10,642
2018		5,508
2019		1,860
2020 and thereafter		—

	$	18,010

Restructuring and Other Related Charges (Tables)

12 Months Ended

Jan. 30, 2016

Summary of Restructuring and Other Related Charges

The following table provides a summary of restructuring and other related charges as presented in the Consolidated Statements of Operations (in thousands):


	Year Ended
	January 30, 2016		January 31, 2015		February 1, 2014
Cost of goods sold	$	10,292	$	—	$	—
Restructuring and other related charges		53,251		10,438		4,732
Write-off of acquired intangible assets		—		3,386		—

	$	63,543	$	13,824	$	4,732


	Year Ended
	January 30, 2016		January 31, 2015		February 1, 2014
Severance and related costs	$	43,926	$	5,181	$	2,786
Facilities and related costs		1,407		1,924		1,672
Loss on early contract termination		1,644		3,230		—
Other exit-related costs		534		86		213

		47,511		10,421		4,671
Impairment and write-off of assets:
Inventory		8,046		—		—
Technology licenses		1,250		—		—
Equipment and other		6,736		17		61
Acquired intangible asset		—		3,386		—

	$	63,543	$	13,824	$	4,732

Reconciliation of Beginning and Ending Restructuring Liability Balances by Major Type of Costs

The following table sets forth a reconciliation of the beginning and ending restructuring liability balances by each major type of costs associated with the restructuring charges (in thousands):


	Severance and Related Costs			Facilities and Related Costs			Other Exit-Related Costs			Total
Balance at February 1, 2014	$	51		$	2,383		$	19		$	2,453
Restructuring charges		5,181			1,924			3,316			10,421
Net cash payments		(5,232	)		(2,968	)		(105	)		(8,305	)

Balance at January 31, 2015		—			1,339			3,230			4,569
Restructuring charges		43,926			1,407			2,178			47,511
Net cash payments		(42,741	)		(1,597	)		(3,764	)		(48,102	)
Exchange rate adjustment		(30	)		(106	)		—			(136	)

Balance at January 30, 2016	$	1,155		$	1,043		$	1,644		$	3,842

Income Taxes (Tables)

12 Months Ended

Jan. 30, 2016

Schedule of US and non US Components of Income Before Income Tax Expense (Benefit)

The U.S. and non-U.S. components of income before income taxes consist of the following (in thousands):


	Year Ended
	January 30, 2016			January 31, 2015		February 1, 2014
U.S. operations	$	33,787		$	31,942	$	31,339
Non-U.S. operations		(832,841	)		400,211		274,918

	$	(799,054	)	$	432,153	$	306,257

Schedule of Provision (Benefit) for Income Taxes

The provision (benefit) for income taxes consists of the following (in thousands):


	Year Ended
	January 30, 2016			January 31, 2015			February 1, 2014
Current income tax provision (benefit):
Federal	$	10,756		$	9,096		$	5,774
State		83			(161	)		73
Foreign		(4,589	)		785			(18,829	)

Total current income tax provision (benefit)		6,250			9,720			(12,982	)

Deferred income tax provision (benefit):
Federal		(4,355	)		(1,775	)		317
State		580			16			32
Foreign		9,871			(11,154	)		3,570

Total deferred income tax provision (benefit)		6,096			(12,913	)		3,919

Total provision (benefit) for income taxes	$	12,346		$	(3,193	)	$	(9,063	)

Schedule of Deferred Tax Assets and Liabilities

Deferred tax assets consist of the following (in thousands):


	January 30, 2016			January 31, 2015
Deferred tax assets:
Federal and California research and other tax credits	$	414,662		$	382,726
Reserves and accruals		35,200			35,538
Share-based compensation		4,476			4,502
Net operating losses		11,055			10,740

Gross deferred tax assets		465,393			433,506
Valuation allowance		(424,914	)		(382,796	)

Total deferred tax assets		40,479			50,710
Total deferred tax liabilities		(7,073	)		(11,209	)

Net deferred tax assets	$	33,406		$	39,501

Reconciliation between the Provision (Benefit) for Income Taxes at the Statutory Rate and the Effective Tax Rate


	Year Ended
	January 30, 2016			January 31, 2015			February 1, 2014
Provision at U.S. notional statutory rate		35.0	%		35.0	%		35.0	%
Non-deductible share-based compensation		(5.9	)		11.2			19.4
Difference in U.S. and non-U.S. tax rates		(31.3	)		(46.0	)		(55.8	)
Benefits from utilization of general business credits		5.0			(12.0	)		(14.1	)
Change in valuation allowance		(4.0	)		10.5			11.9
Other		(0.3	)		0.6			0.6

Effective tax rate		(1.5	)%		(0.7	)%		(3.0	)%

Unrecognized Tax Benefits Reconciliation

The following table reflects changes in the unrecognized tax benefits (in thousands):


	Year Ended
	January 30, 2016			January 31, 2015			February 1, 2014
Unrecognized tax benefits as of the beginning of the period	$	45,197		$	51,682		$	79,031
Increases related to prior year tax positions		304			976			499
Decreases related to prior year tax positions		(4,334	)		(386	)		(111	)
Increases related to current year tax positions		4,237			5,356			2,666
Settlements		(704	)		—			(7,423	)
Lapse in the statute of limitations		(9,739	)		(10,691	)		(13,969	)
Foreign exchange gain		(5,822	)		(1,740	)		(9,011	)

Gross amounts of unrecognized tax benefits as of the end of the period	$	29,139		$	45,197		$	51,682

Commitments and Contingencies (Tables)

12 Months Ended

Jan. 30, 2016

Future Minimum Lease Payments, Net of Estimated Sublease Income under Operating and Capital Leases

Future minimum lease payments, net of estimated sublease income, and payments under technology license obligations as of January 30, 2016, are presented in the following tables (in thousands):


Fiscal Year	Minimum Operating Leases Payments
2017	$	63,296
2018		35,679
2019		24,407
2020		14,280
2021		2,939
Thereafter		4,946

Total future minimum lease payments	$	145,547

Future Minimum Lease Payments Under Technology License Obligations


Fiscal Year	Technology License Obligations
2017	$	14,769
2018		12,630
2019 and thereafter		—

Total future minimum lease payments	$	27,399
Less: amount representing interest		(580	)

Present value of future minimum payments		26,819
Less: current portion		(14,358	)

Non-current portion	$	12,461

Shareholders' Equity (Tables)

12 Months Ended

Jan. 30, 2016

Disclosure of Share-based Compensation Arrangements by Share-based Payment Award

Stock option activity under the Company’s stock option and stock incentive plans is included in the following table (in thousands, except for per share amounts):


	Time-Based Options					Market-Based Options					Total
	Number of Shares			Weighted Average Exercise Price		Number of Shares			Weighted Average Exercise Price		Number of Shares			Weighted Average Exercise Price
Balance at February 2, 2013		49,637		$	13.28		2,759		$	15.43		52,396		$	13.39
Granted		18,922		$	10.82		—			—		18,922		$	10.82
Exercised		(15,482	)	$	9.40		—			—		(15,482	)	$	9.40
Canceled/Forfeited		(3,921	)	$	15.15		(136	)	$	15.43		(4,057	)	$	15.16

Balance at February 1, 2014		49,156		$	13.40		2,623		$	15.43		51,779		$	13.51
Granted		6,365		$	15.33		—			—		6,365		$	15.33
Exercised		(3,732	)	$	10.19		—			—		(3,732	)	$	10.19
Canceled/Forfeited		(4,649	)	$	14.66		(391	)	$	15.43		(5,040	)	$	14.72

Balance at January 31, 2015		47,140		$	13.79		2,232		$	15.43		49,372		$	13.88
Granted		6,170		$	14.13		—			—		6,170		$	14.13
Exercised		(2,225	)	$	9.79		—			—		(2,225	)	$	9.79
Canceled/Forfeited		(10,211	)	$	15.68		(76	)	$	15.43		(10,287	)	$	15.68

Balance at January 30, 2016		40,874		$	13.59		2,156		$	15.43		43,030		$	13.68

Vested or expected to vest at January 30, 2016		38,773		$	13.58

Schedule of Outstanding Options and Exercisable Options Information, by Range of Exercise Prices

As of January 30, 2016, outstanding options and exercisable options information, by range of exercise prices, was as follows:


		Outstanding Options						Exercisable Options
Range of Exercise Prices		Number of Shares (in Thousands)		Weighted Average Remaining Contractual Term (in Years)		Weighted Average Exercise Price		Number of Shares (in Thousands)		Weighted Average Exercise Price
$ 5.70	$ 9.49		3,673		3.38	$	7.04		3,386	$	6.89
$10.31	$10.76		11,574		7.09	$	10.76		3,570	$	10.76
$10.80	$14.35		9,275		6.60	$	13.25		3,661	$	12.06
$14.45	$15.43		9,842		6.07	$	15.16		4,843	$	15.26
$15.43	$34.38		8,666		3.80	$	19.18		5,763	$	20.85

Total			43,030		5.77	$	13.68		21,223	$	14.13

Schedule of Nonvested Share Activity

Activity related to the non-vested portion of the restricted stock units is included in the following table (in thousands, except for share prices):


	Time-Based					Performance-Based					Market-Based					Total
	Number of Shares			Weighted Average Grant Date Fair Value		Number of Shares			Weighted Average Grant Date Fair Value		Number of Shares			Weighted Average Grant Date Fair Value		Number of Shares			Weighted Average Grant Date Fair Value
Balance at February 2, 2013		12,739		$	15.78												12,739		$	15.78
Granted		3,728		$	10.79		100		$	10.52							3,828		$	10.78
Vested		(3,925	)	$	16.19		—			—							(3,925	)	$	16.19
Canceled/Forfeited		(1,288	)	$	14.39		—			—							(1,288	)	$	14.39

Balance at February 1, 2014		11,254		$	14.14		100		$	10.52							11,354		$	14.11
Granted		5,534		$	15.20		1,277	*	$	14.98							6,811		$	15.16
Vested		(5,938	)	$	13.96		(3	)	$	10.52							(5,941	)	$	13.96
Canceled/Forfeited		(1,102	)	$	14.32		(120	)	$	11.23							(1,222	)	$	14.02

Balance at January 31, 2015		9,748		$	14.84		1,254		$	14.99							11,002		$	14.85
Granted		5,689		$	12.88		669	*	$	14.08		407	*	$	12.24		6,765		$	12.96
Vested		(5,139	)	$	15.06		(658	)	$	15.15		—			—		(5,797	)	$	15.07
Canceled/Forfeited		(1,955	)	$	13.99		(288	)	$	14.39		(54	)	$	12.24		(2,297	)	$	14.00

Balance at January 30, 2016		8,343		$	13.57		977		$	14.43		353					9,673		$	13.61

*	Amounts represent the target number of restricted stock units at grant date. For awards granted to our executive officers, up to 200% of the target restricted stock units may vest if the maximum level for financial and strategic goals is achieved.

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs

The following table presents details of share-based compensation expenses by functional line item (in thousands):


	Year Ended
	January 30, 2016		January 31, 2015		February 1, 2014
Cost of goods sold	$	7,916	$	7,972	$	8,863
Research and development		98,792		94,432		109,432
Selling and marketing		11,106		11,469		13,940
General and administrative		15,965		23,373		23,638

	$	133,779	$	137,246	$	155,873

Schedule of Cash Dividends


	Year Ended
	January 30, 2016		January 31, 2015		February 1, 2014
Cash dividend per share	$	0.24	$	0.24	$	0.24

Total payment to shareholders (in thousands)	$	122,821	$	122,801	$	119,449

Employee Stock Purchase Plan

Weighted Average Assumptions Used to Calculate Fair Value Awards


	Year Ended
	January 30, 2016			January 31, 2015			February 1, 2014
Employee Stock Purchase Plan:
Estimated fair value	$	3.24		$	4.10		$	3.65
Expected volatility		41	%		30	%		37	%
Expected term (in years)		1.3			1.3			1.3
Risk-free interest rate		0.6	%		0.3	%		0.2	%
Expected dividend yield		2.4	%		1.6	%		2.0	%

Total Shareholder Return

Weighted Average Assumptions Used to Calculate Fair Value Awards


	Year Ended
	January 30, 2016
Total Shareholder Return Awards:
Expected term (in years)		2.0
Expected volatility		27	%
Average correlation coefficient of peer companies		0.4	%
Risk-free interest rate		0.5	%
Expected dividend yield		1.7	%

Time Based Option Award

Weighted Average Assumptions Used to Calculate Fair Value Awards


	Year Ended
	January 30, 2016			January 31, 2015			February 1, 2014
Time-based Stock Options:
Weighted average fair value	$	3.93		$	4.35		$	3.43
Expected volatility		34	%		35	%		45	%
Expected term (in years)		5.4			5.0			5.0
Risk-free interest rate		1.6	%		1.6	%		0.8	%
Expected dividend yield		1.8	%		1.6	%		2.4	%

Segment and Geographic Information (Tables)

12 Months Ended

Jan. 30, 2016

Net Revenue and Long-Lived Asset Information based on Geographic Region


	Year Ended
	January 30, 2016		January 31, 2015		February 1, 2014
Net Revenue:
United States	$	42,854	$	62,333	$	68,321
China		1,569,147		2,214,876		1,869,381
Thailand		189,299		294,706		353,363
Malaysia		302,953		377,903		352,756
Philippines		211,602		254,381		257,899
Others		409,973		502,764		502,680

	$	2,725,828	$	3,706,963	$	3,404,400


	January 30, 2016		January 31, 2015
Property and equipment, net:
Bermuda	$	3,093	$	3,358
China		22,917		25,910
Israel		15,069		26,728
Singapore		69,241		79,216
United States		173,537		186,321
Others		15,683		19,106

	$	299,540	$	340,639

Net Revenue by End Market

The following table presents net revenue by end market (in thousands):


	Year Ended
	January 30, 2016		January 31, 2015		February 1, 2014
Net Revenue by End Market
Storage	$	1,201,378	$	1,744,656	$	1,681,953
Mobile and Wireless		786,239		1,071,777		839,407
Networking		551,743		674,701		670,249
Other		186,468		215,829		212,791

	$	2,725,828	$	3,706,963	$	3,404,400

Supplementary Data (Unaudited) (Tables)

12 Months Ended

Jan. 30, 2016

Schedule of Quarterly Financial Information


	Fiscal 2016
	First Quarter (1)		Second Quarter (2)			Third Quarter (3)			Fourth Quarter (4)
	(In thousands, except per share amounts)
Net revenue	$	724,288	$	710,492		$	674,890		$	616,158
Gross profit	$	373,135	$	248,773		$	295,636		$	313,548
Net income (loss)	$	14,090	$	(771,940	)	$	(57,750	)	$	4,200
Net income (loss) per share:
Basic	$	0.03	$	(1.49	)	$	(0.11	)	$	0.01
Diluted	$	0.03	$	(1.49	)	$	(0.11	)	$	0.01

	Fiscal 2015
	First Quarter (5)		Second Quarter (6)			Third Quarter (7)			Fourth Quarter (8)
	(In thousands, except per share amounts)
Net revenue	$	957,830	$	961,545		$	930,136		$	857,452
Gross profit	$	463,970	$	483,804		$	475,162		$	440,321
Net income	$	99,479	$	138,870		$	115,304		$	81,693
Net income per share:
Basic	$	0.20	$	0.27		$	0.22		$	0.16
Diluted	$	0.19	$	0.27		$	0.22		$	0.16

(1)

(2)

(3)

(4)

(5)	The first quarter of fiscal 2015 includes $8.5 million of restructuring and other exit-related costs that includes a $3.4 million write-off of IPR&D.

(6)	The second quarter of fiscal 2015 includes an $8.8 million gain from the sale of an investment and $2.2 million of costs for the surety bonds related to the litigation with CMU.

(7)	The third quarter of fiscal 2015 includes $2.3 million of costs for the surety bonds related to the litigation with CMU.

(8)	The fourth quarter of fiscal 2015 includes $3.4 million of restructuring and other exit-related costs, and $2.8 million of costs for the surety bonds related to the litigation with CMU.

The Company and its Significant Accounting Policies - Additional Information (Detail) $ in Millions	12 Months Ended
	Jan. 30, 2016 USD ($) Employee Entity Customer Person	Jan. 31, 2015 USD ($) Entity Customer	Feb. 01, 2014 USD ($) Entity
Significant Accounting Policies [Line Items]
Number of distributors with more than 10% revenue \| Entity	0	1	0
Net Revenue percentage from distributor representing more than 10% revenue		11.00%
Inventory turnover period, minimum (in days)	60 days
Inventory turnover period, maximum (in days)	90 days
Minimum likelihood that uncertain tax position will be sustained as a result of examination by income tax audits	50.00%
Standard warranty period	90 days
Extended warranty period	1 year
Selling and marketing
Significant Accounting Policies [Line Items]
Advertising costs \| $	$ 5.1	$ 5.6	$ 0.3
Buildings
Significant Accounting Policies [Line Items]
Property and equipment, estimated useful lives (in years)	30 years
Building improvements
Significant Accounting Policies [Line Items]
Property and equipment, estimated useful lives (in years)	15 years
Machinery and equipment \| Minimum
Significant Accounting Policies [Line Items]
Property and equipment, estimated useful lives (in years)	3 years
Machinery and equipment \| Maximum
Significant Accounting Policies [Line Items]
Property and equipment, estimated useful lives (in years)	7 years
Computer software \| Minimum
Significant Accounting Policies [Line Items]
Property and equipment, estimated useful lives (in years)	3 years
Computer software \| Maximum
Significant Accounting Policies [Line Items]
Property and equipment, estimated useful lives (in years)	4 years
Furniture and fixtures \| Minimum
Significant Accounting Policies [Line Items]
Property and equipment, estimated useful lives (in years)	3 years
Furniture and fixtures \| Maximum
Significant Accounting Policies [Line Items]
Property and equipment, estimated useful lives (in years)	4 years
Annual Grant
Significant Accounting Policies [Line Items]
Share-based compensation, vest term (in years)	4 years
New Hire
Significant Accounting Policies [Line Items]
Share-based compensation, vest term (in years)	5 years
Stock Purchase Rights
Significant Accounting Policies [Line Items]
Share-based compensation, offering period (in years)	2 years
Employee group
Significant Accounting Policies [Line Items]
Number of groups used in calculating assumptions for stock option exercises and pre-vesting terminations of stock options \| Employee	2
Employee/non-employee group
Significant Accounting Policies [Line Items]
Number of groups used in calculating assumptions for stock option exercises and pre-vesting terminations of stock options \| Person	1
Customer Concentration Risk \| Net Revenue \| Customer A
Significant Accounting Policies [Line Items]
Concentration of risk percentage	18.00%	20.00%	24.00%
Customer Concentration Risk \| Net Revenue \| Customer B
Significant Accounting Policies [Line Items]
Concentration of risk percentage	13.00%	13.00%	12.00%
Credit Concentration Risk \| Accounts Receivable
Significant Accounting Policies [Line Items]
Number of major customers \| Customer	2	2
Credit Concentration Risk \| Accounts Receivable \| Customer A
Significant Accounting Policies [Line Items]
Concentration of risk percentage	13.00%	15.00%
Credit Concentration Risk \| Accounts Receivable \| Customer B
Significant Accounting Policies [Line Items]
Concentration of risk percentage	11.00%	14.00%
Short-term Investments \| Minimum
Significant Accounting Policies [Line Items]
Maturity period to classify investments	90 days
Short-term Investments \| Maximum
Significant Accounting Policies [Line Items]
Maturity period to classify investments	1 year

Divestitures - Additional Information (Detail) - USD ($)	12 Months Ended
	Jan. 30, 2016	Feb. 01, 2014	Aug. 01, 2015
Business Acquisition [Line Items]
Intellectual property and equipment			$ 9,300,000
Goodwill written off	$ 0
Gain (Loss) on sale of business		$ 6,975,000
Discontinued Operation Or Asset Disposals
Business Acquisition [Line Items]
Intellectual property and equipment	100,000
Goodwill written off	2,600,000
Gain (Loss) on sale of business	$ 7,000,000

Summary of Investments (Detail) - USD ($) $ in Thousands	Jan. 30, 2016	Jan. 31, 2015
Gain (Loss) on Investments [Line Items]
Amortized Cost	$ 1,016,520	$ 1,327,310
Gross Unrealized Gains	958	4,353
Gross Unrealized Losses	(1,613)	(2,859)
Estimated Fair Value	1,015,865	1,328,804
Short-term Investments
Gain (Loss) on Investments [Line Items]
Amortized Cost	1,005,224	1,314,810
Gross Unrealized Gains	958	4,353
Gross Unrealized Losses	(1,613)	(585)
Estimated Fair Value	1,004,569	1,318,578
Short-term Investments \| Corporate debt securities
Gain (Loss) on Investments [Line Items]
Amortized Cost	558,337	983,008
Gross Unrealized Gains	766	3,872
Gross Unrealized Losses	(1,282)	(563)
Estimated Fair Value	557,821	986,317
Short-term Investments \| U.S. government and agency debt
Gain (Loss) on Investments [Line Items]
Amortized Cost	317,595	178,898
Gross Unrealized Gains	64	265
Gross Unrealized Losses	(254)	(7)
Estimated Fair Value	317,405	179,156
Short-term Investments \| Asset-backed Securities
Gain (Loss) on Investments [Line Items]
Amortized Cost	76,711	91,432
Gross Unrealized Gains	81	108
Gross Unrealized Losses	(56)	(9)
Estimated Fair Value	76,736	91,531
Short-term Investments \| Foreign government and agency debt
Gain (Loss) on Investments [Line Items]
Amortized Cost	21,370	28,051
Gross Unrealized Gains	2	61
Gross Unrealized Losses	(14)	(2)
Estimated Fair Value	21,358	28,110
Short-term Investments \| Municipal debt securities
Gain (Loss) on Investments [Line Items]
Amortized Cost	31,211	33,421
Gross Unrealized Gains	45	47
Gross Unrealized Losses	(7)	(4)
Estimated Fair Value	31,249	33,464
Long-term investments
Gain (Loss) on Investments [Line Items]
Amortized Cost	11,296	12,500
Gross Unrealized Losses		(2,274)
Estimated Fair Value	11,296	10,226
Long-term investments \| Auction rate securities
Gain (Loss) on Investments [Line Items]
Amortized Cost	11,296	12,500
Gross Unrealized Losses	(1,200)	(2,274)
Estimated Fair Value	$ 11,296	$ 10,226

Investments - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 30, 2016	Jan. 31, 2015
Gain (Loss) on Investments [Line Items]
Auction rate securities, aggregate par value	$ 12,500
Gross Unrealized Losses	1,613	$ 2,859
Impairment loss	1,204
Long-term investments
Gain (Loss) on Investments [Line Items]
Gross Unrealized Losses		2,274
Long-term investments \| Auction rate securities
Gain (Loss) on Investments [Line Items]
Gross Unrealized Losses	$ 1,200	$ 2,274

Gross Realized Gains and Losses on Sales of Available-for-Sale Securities (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 30, 2016	Jan. 31, 2015	Feb. 01, 2014
Schedule of Available-for-sale Securities [Line Items]
Gross realized gains	$ 1,654	$ 1,618	$ 1,567
Gross realized losses	(1,923)	(169)	(268)
Impairment loss	(1,204)
Total net realized gains (losses)	$ (1,473)	$ 1,449	$ 1,299

Contractual Maturities of Available for Sale Securities (Detail) - USD ($) $ in Thousands	Jan. 30, 2016	Jan. 31, 2015
Amortized Cost
Due in one year or less	$ 304,117	$ 361,108
Due between one and five years	689,847	950,702
Due over five years	22,556	15,500
Amortized Cost	1,016,520	1,327,310
Estimated Fair Value
Due in one year or less	304,035	361,396
Due between one and five years	689,279	954,151
Due over five years	22,551	13,257
Estimated Fair Value	$ 1,015,865	$ 1,328,804

Summary of Investments Gross Unrealized Losses and Fair Value (Detail) - USD ($) $ in Thousands	Jan. 30, 2016	Jan. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months Fair Value	$ 612,510	$ 306,761
Less than 12 months Unrealized Losses	(1,566)	(580)
12 months or more Fair Value	15,954	12,231
12 months or more Unrealized Losses	(47)	(2,279)
Total Fair Value	628,464	318,992
Total Unrealized Losses	(1,613)	(2,859)
Corporate debt securities
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months Fair Value	283,138	243,699
Less than 12 months Unrealized Losses	(1,237)	(558)
12 months or more Fair Value	14,383	2,005
12 months or more Unrealized Losses	(45)	(5)
Total Fair Value	297,521	245,704
Total Unrealized Losses	(1,282)	(563)
U.S. government and agency debt
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months Fair Value	263,325	32,165
Less than 12 months Unrealized Losses	(254)	(7)
Total Fair Value	263,325	32,165
Total Unrealized Losses	(254)	(7)
Asset-backed Securities
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months Fair Value	46,646	25,053
Less than 12 months Unrealized Losses	(56)	(9)
Total Fair Value	46,646	25,053
Total Unrealized Losses	(56)	(9)
Foreign government and agency debt
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months Fair Value	16,458	2,999
Less than 12 months Unrealized Losses	(14)	(2)
Total Fair Value	16,458	2,999
Total Unrealized Losses	(14)	(2)
Municipal debt securities
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months Fair Value	2,943	2,845
Less than 12 months Unrealized Losses	(5)	(4)
12 months or more Fair Value	1,571
12 months or more Unrealized Losses	(2)
Total Fair Value	4,514	2,845
Total Unrealized Losses	$ (7)	(4)
Auction rate securities
Schedule of Available-for-sale Securities [Line Items]
12 months or more Fair Value		10,226
12 months or more Unrealized Losses		(2,274)
Total Fair Value		10,226
Total Unrealized Losses		$ (2,274)

Cash and Cash Equivalents (Detail) - USD ($) $ in Thousands	Jan. 30, 2016	Jan. 31, 2015	Feb. 01, 2014	Feb. 02, 2013
Cash and Cash Equivalents [Line Items]
Cash	$ 669,312	$ 864,680
Cash equivalents:
Time deposits	209,405	213,012
U.S. government and agency debt	184,374
Corporate debt securities	54,689	21,999
Money market funds	160,400	111,286
Cash and cash equivalents	$ 1,278,180	$ 1,210,977	$ 965,750	$ 751,953

Provision for Sales Return and Allowance (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 30, 2016	Jan. 31, 2015
Provision for sales returns and allowances:
Sales returns	$ 1,873	$ 899
Doubtful accounts	889	1,213
Accounts receivable, provision for sales return and allowances	$ 2,762	$ 2,112

Inventories (Detail) - USD ($) $ in Thousands	Jan. 30, 2016	Jan. 31, 2015
Inventory [Line Items]
Work-in-process	$ 131,471	$ 183,869
Finished goods	78,546	124,293
Inventories	$ 210,017	$ 308,162

Property and Equipment, Net (Detail) - USD ($) $ in Thousands	Jan. 30, 2016	Jan. 31, 2015
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 1,007,839	$ 1,034,203
Less: Accumulated depreciation	(708,299)	(693,564)
Property and equipment, net	299,540	340,639
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	578,627	601,961
Buildings
Property, Plant and Equipment [Line Items]
Property and equipment, gross	144,320	144,320
Computer software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	102,928	99,312
Land
Property, Plant and Equipment [Line Items]
Property and equipment, gross	53,373	53,373
Building improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	49,927	49,753
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	50,192	51,434
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	27,119	27,883
Construction in progress
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 1,353	$ 6,167

Supplemental Financial Information - Additional Information (Detail) - USD ($)	12 Months Ended
	Jan. 30, 2016	Jan. 31, 2015	Feb. 01, 2014
Additional Financial Information [Line Items]
Depreciation expense	$ 73,800,000	$ 78,300,000	$ 77,200,000
Amortization expense	10,748,000	16,397,000	43,925,000
Investment impairment	3,500,000	0	1,500,000
Technology and Other Licenses
Additional Financial Information [Line Items]
Amortization expense	$ 26,400,000	$ 27,900,000	$ 25,600,000

Other Non-current Assets (Detail) - USD ($) $ in Thousands	Jan. 30, 2016	Jan. 31, 2015
Other non-current assets:
Technology and other licenses	$ 48,770	$ 61,217
Deferred tax assets	34,505	22,273
Investments in privately-held companies	5,804	9,267
Prepaid land use rights	13,123	13,432
Deposits	51,512	7,903
Other	10,996	14,747
Other non-current assets	$ 164,710	$ 128,839

Accrued Liabilities (Detail) - USD ($) $ in Thousands	Jan. 30, 2016	Jan. 31, 2015
Accrued liabilities:
Accrued rebates	$ 41,320	$ 39,105
Accrued royalties	16,217	24,680
Technology license obligations	17,985	14,428
Accrued legal expense	9,761	8,327
Accrued litigation	3,830	1,700
Other	42,947	43,148
Accrued liabilities	$ 132,060	$ 131,388

Deferred Income (Detail) - USD ($) $ in Thousands	Jan. 30, 2016	Jan. 31, 2015
Deferred Revenue Arrangement [Line Items]
Net deferred revenue	$ 77,935	$ 98,444
Deferred cost of goods sold	(22,213)	(30,324)
Deferred income	$ 55,722	$ 68,120

Other Non-current Liabilities (Detail) - USD ($) $ in Thousands	Jan. 30, 2016	Jan. 31, 2015
Other non-current liabilities:
Technology license obligations	$ 12,461	$ 16,468
Long-term accrued employee compensation	6,078	4,610
Other	8,424	11,115
Other non-current liabilities	$ 26,963	$ 32,193

Changes in Accumulated Other Comprehensive Income (Loss) by Components (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 30, 2016	Jan. 31, 2015	Feb. 01, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	$ 5,146,089	$ 4,675,910	$ 4,484,595
Net current-period other comprehensive income (loss), net of tax	(1,103)	(289)	(551)
Balance	4,140,123	5,146,089	4,675,910
Unrealized Gain (Loss) on Marketable Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	3,768	2,534
Other comprehensive income (loss) before reclassifications	(3,838)	2,479
Amounts reclassified from accumulated other comprehensive income	(586)	(1,245)
Net current-period other comprehensive income (loss), net of tax	(4,424)	1,234
Balance	(656)	3,768	2,534
Unrealized Gain (Loss) on Auction Rate Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(2,274)	(2,871)
Other comprehensive income (loss) before reclassifications		85
Amounts reclassified from accumulated other comprehensive income	2,274	512
Net current-period other comprehensive income (loss), net of tax	2,274	597
Balance		(2,274)	(2,871)
Unrealized Gain (Loss) on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(1,186)	934
Other comprehensive income (loss) before reclassifications	1,111	(2,338)
Amounts reclassified from accumulated other comprehensive income	(64)	218
Net current-period other comprehensive income (loss), net of tax	1,047	(2,120)
Balance	(139)	(1,186)	934
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	308	597	1,148
Other comprehensive income (loss) before reclassifications	(2,727)	226
Amounts reclassified from accumulated other comprehensive income	1,624	(515)
Net current-period other comprehensive income (loss), net of tax	(1,103)	(289)	(551)
Balance	$ (795)	$ 308	$ 597

Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) by Components (Detail) - USD ($)
$ in Thousands

3 Months Ended

12 Months Ended

Jan. 30, 2016

^[1]

Oct. 31, 2015

^[2]

Aug. 01, 2015

^[3]

May 02, 2015

^[4]

Jan. 31, 2015

^[5]

Nov. 01, 2014

^[6]

Aug. 02, 2014

^[7]

May 03, 2014

^[8]

Jan. 30, 2016

Jan. 31, 2015

Feb. 01, 2014

Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]

Interest and other income, net

$ 17,685

$ 23,334

$ 25,566

Research and development

(1,054,257)

(1,158,810)

(1,153,999)

Selling and marketing

(128,780)

(143,952)

(151,903)

General and administrative

(146,128)

(124,841)

(105,420)

Net income (loss)

$ 4,200

$ (57,750)

$ (771,940)

$ 14,090

$ 81,693

$ 115,304

$ 138,870

$ 99,479

(811,400)

435,346

315,320

Reclassification out of Accumulated Other Comprehensive Income

Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]

Net income (loss)

(1,624)

515

4,758

Reclassification out of Accumulated Other Comprehensive Income | Unrealized Gain (Loss) on Marketable Securities

Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]

Interest and other income, net

586

1,245

1,139

Reclassification out of Accumulated Other Comprehensive Income | Unrealized Gain (Loss) on Cash Flow Hedges

Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]

Research and development

(198)

3,329

Selling and marketing

(1)

(8)

266

General and administrative

(12)

$ 24

Reclassification out of Accumulated Other Comprehensive Income | Unrealized Gain (Loss) on Auction Rate Securities

Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]

Interest and other income, net

$ (2,274)

$ (512)

[1]	The fourth quarter of fiscal 2016 includes $4.4 million of restructuring and other related charges, $3.8 million related to the settlement of litigation matters including a charge for the settlement reached with CMU (see "Note 15 - Subsequent Events" in the Notes to the Consolidated Financial Statements) and $2.9 million of costs for the surety bonds related to the litigation with CMU.
[2]	The third quarter of fiscal 2016 includes $45.5 million of restructuring and other related charges that include $8.0 million for the write down of inventory and $6.2 million for the impairment of equipment and other assets due to the restructuring of the mobile platform business, and $2.9 million of costs for the surety bonds related to the litigation with CMU.
[3]	The second quarter of fiscal 2016 includes a $745.6 million charge for litigation matters recognized by the Company including the settlement reached with CMU (see "Note 15 - Subsequent Events" in the Notes to the Consolidated Financial Statements) and certain other pending litigation, $13.0 million of restructuring and other related charges, and $2.7 million of costs for the surety bonds related to the litigation with CMU.
[4]	The first quarter of fiscal 2016 includes a charge for a cash payment authorized by our Board of Directors of $15.4 million to Dr. Sehat Sutardja (see "Note 14 - Related Party Transactions" in the Notes to the Consolidated Financial Statements) and $2.9 million of costs for the surety bonds related to the litigation with CMU.
[5]	The fourth quarter of fiscal 2015 includes $3.4 million of restructuring and other exit-related costs, and $2.8 million of costs for the surety bonds related to the litigation with CMU.
[6]	The third quarter of fiscal 2015 includes $2.3 million of costs for the surety bonds related to the litigation with CMU.
[7]	The second quarter of fiscal 2015 includes an $8.8 million gain from the sale of an investment and $2.2 million of costs for the surety bonds related to the litigation with CMU.
[8]	The first quarter of fiscal 2015 includes $8.5 million of restructuring and other exit-related costs that includes a $3.4 million write-off of IPR&D.

Interest and Other Income, Net (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 30, 2016	Jan. 31, 2015	Feb. 01, 2014
Interest and other income, net:
Interest income	$ 15,982	$ 11,370	$ 9,379
Net realized gain (loss) on investments	(1,473)	1,449	1,299
Currency translation gain	6,655	1,871	8,739
Other income (loss)	(2,773)	9,811	8,025
Interest expense	(706)	(1,167)	(1,876)
Interest and other income, net	$ 17,685	$ 23,334	$ 25,566

- Definition

This item represents the net total realized and unrealized gain (loss) included in earnings for the period as a result of selling or holding marketable securities categorized as trading, available-for-sale, or held-to-maturity, including the unrealized holding gain (loss) of held-to-maturity securities transferred to the trading security category and the cumulative unrealized gain (loss) which was included in other comprehensive income (a separate component of shareholders' equity) for available-for-sale securities transferred to trading securities during the period. Additionally, this item would include any gains (losses) realized during the period from the sale of investments accounted for under the cost method of accounting and losses recognized for other than temporary impairments (OTTI) of the subject investments.

+ References + Details

Supplemental Cash Flow Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 30, 2016	Jan. 31, 2015	Feb. 01, 2014
Supplemental cash flow information:
Cash paid for interest	$ 703	$ 1,167	$ 1,873
Cash paid for income taxes, net	13,363	15,727	9,385
Non-Cash Investing and Financing Activities:
Unsettled trades of available-for-sale securities	53,749
Purchase of intellectual property under license obligations	13,800		8,900
Unpaid purchase of property and equipment at end of year	$ 9,069	$ 7,083	$ 7,285

Computations of Basic and Diluted Net Income (Loss) Per Share (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands

3 Months Ended

12 Months Ended

Jan. 30, 2016

^[1]

Oct. 31, 2015

^[2]

Aug. 01, 2015

^[3]

May 02, 2015

^[4]

Jan. 31, 2015

^[5]

Nov. 01, 2014

^[6]

Aug. 02, 2014

^[7]

May 03, 2014

^[8]

Jan. 30, 2016

Jan. 31, 2015

Feb. 01, 2014

Numerator:

Net income (loss)

$ 4,200

$ (57,750)

$ (771,940)

$ 14,090

$ 81,693

$ 115,304

$ 138,870

$ 99,479

$ (811,400)

$ 435,346

$ 315,320

Denominator:

Weighted average shares - basic

510,945

511,089

496,518

Effect of dilutive securities:

Share-based awards

9,671

7,895

Weighted average shares - diluted

510,945

520,760

504,413

Basic

$ 0.01

$ (0.11)

$ (1.49)

$ 0.03

$ 0.16

$ 0.22

$ 0.27

$ 0.20

$ (1.59)

$ 0.85

$ 0.64

Diluted

$ 0.01

$ (0.11)

$ (1.49)

$ 0.03

$ 0.16

$ 0.22

$ 0.27

$ 0.19

$ (1.59)

$ 0.84

$ 0.63

[1]	The fourth quarter of fiscal 2016 includes $4.4 million of restructuring and other related charges, $3.8 million related to the settlement of litigation matters including a charge for the settlement reached with CMU (see "Note 15 - Subsequent Events" in the Notes to the Consolidated Financial Statements) and $2.9 million of costs for the surety bonds related to the litigation with CMU.
[2]	The third quarter of fiscal 2016 includes $45.5 million of restructuring and other related charges that include $8.0 million for the write down of inventory and $6.2 million for the impairment of equipment and other assets due to the restructuring of the mobile platform business, and $2.9 million of costs for the surety bonds related to the litigation with CMU.
[3]	The second quarter of fiscal 2016 includes a $745.6 million charge for litigation matters recognized by the Company including the settlement reached with CMU (see "Note 15 - Subsequent Events" in the Notes to the Consolidated Financial Statements) and certain other pending litigation, $13.0 million of restructuring and other related charges, and $2.7 million of costs for the surety bonds related to the litigation with CMU.
[4]	The first quarter of fiscal 2016 includes a charge for a cash payment authorized by our Board of Directors of $15.4 million to Dr. Sehat Sutardja (see "Note 14 - Related Party Transactions" in the Notes to the Consolidated Financial Statements) and $2.9 million of costs for the surety bonds related to the litigation with CMU.
[5]	The fourth quarter of fiscal 2015 includes $3.4 million of restructuring and other exit-related costs, and $2.8 million of costs for the surety bonds related to the litigation with CMU.
[6]	The third quarter of fiscal 2015 includes $2.3 million of costs for the surety bonds related to the litigation with CMU.
[7]	The second quarter of fiscal 2015 includes an $8.8 million gain from the sale of an investment and $2.2 million of costs for the surety bonds related to the litigation with CMU.
[8]	The first quarter of fiscal 2015 includes $8.5 million of restructuring and other exit-related costs that includes a $3.4 million write-off of IPR&D.

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

+ References + Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References + Details

Anti-dilutive Potential Shares (Detail) - shares shares in Thousands	12 Months Ended
	Jan. 30, 2016	Jan. 31, 2015	Feb. 01, 2014
Weighted average shares outstanding:
Share-based awards	64,420	35,636	40,504

Notional Amounts of Outstanding Foreign Currency Forward Contracts (Detail) - USD ($) $ in Thousands	Jan. 30, 2016	Jan. 31, 2015
Foreign Exchange Buy Contracts \| Israeli shekel
Derivative [Line Items]
Derivative, notional amount	$ 19,082	$ 51,326

Information about Gains (Losses) Associated with Derivative Financial Instruments (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 30, 2016	Jan. 31, 2015	Feb. 01, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gains (Losses) in Statement of Operations	$ (421)	$ (2,111)	$ 3,368
Cash flow hedges \| Foreign currency forward contracts \| Research and development
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gains (Losses) in Statement of Operations	(390)	(1,930)	3,099
Cash flow hedges \| Foreign currency forward contracts \| Selling and marketing
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gains (Losses) in Statement of Operations	(5)	(24)	23
Cash flow hedges \| Foreign currency forward contracts \| General and administrative
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gains (Losses) in Statement of Operations	$ (26)	$ (157)	$ 246

Derivative Financial Instruments - Additional Information (Detail) - USD ($)	12 Months Ended
	Jan. 30, 2016	Jan. 31, 2015	Feb. 01, 2014
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Cash flow hedges were terminated as a result of forecasted transactions that did not occur	$ 0
Not Designated as Hedging Instrument \| Foreign currency forward contracts \| Interest and other income, net
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Portion of gains excluded from the assessment of hedge effectiveness	$ 100,000	$ 200,000	$ 500,000

Fair Value Measurements - Additional Information (Detail) - USD ($) $ in Millions	Jan. 30, 2016	Aug. 01, 2015
Fair Value, Measurement Inputs, Disclosure [Line Items]
Percentage of total amount of assets measured using Level 3 valuation methodologies to total assets	0.20%
Carrying value of equipment held for sale		$ 9.3

Assets and Liabilities that are Measured at Fair Value on a Recurring Basis (Detail) - Items measured at fair value - USD ($) $ in Thousands	Jan. 30, 2016	Jan. 31, 2015
Assets
Total assets	$ 1,625,441	$ 1,676,983
Other non-current assets \| Severance Pay Fund
Assets
Other non-current asset	678	1,758
Foreign currency forward contracts
Liabilities
Accrued liabilities	195	1,379
Foreign currency forward contracts \| Prepaid expenses and other current assets
Assets
Prepaid expenses and other current assets	30	124
Short-term Investments \| Corporate debt securities
Assets
Investments	557,821	986,317
Short-term Investments \| U.S. government and agency debt
Assets
Investments	317,405	179,156
Short-term Investments \| Asset-backed Securities
Assets
Investments	76,736	91,531
Short-term Investments \| Foreign government and agency debt
Assets
Investments	21,358	28,110
Short-term Investments \| Municipal debt securities
Assets
Investments	31,249	33,464
Cash equivalents \| Money market funds
Assets
Cash equivalents	160,400	111,286
Cash equivalents \| Time deposits
Assets
Cash equivalents	209,405	213,012
Cash equivalents \| Corporate debt securities
Assets
Cash equivalents	54,689	21,999
Cash equivalents \| U.S. government and agency debt
Assets
Cash equivalents	184,374
Long-term investments \| Auction rate securities
Assets
Investments	11,296	10,226
Level 1
Assets
Total assets	662,179	290,442
Level 1 \| Short-term Investments \| U.S. government and agency debt
Assets
Investments	317,405	179,156
Level 1 \| Cash equivalents \| Money market funds
Assets
Cash equivalents	160,400	111,286
Level 1 \| Cash equivalents \| U.S. government and agency debt
Assets
Cash equivalents	184,374
Level 2
Assets
Total assets	951,966	1,376,315
Level 2 \| Other non-current assets \| Severance Pay Fund
Assets
Other non-current asset	678	1,758
Level 2 \| Foreign currency forward contracts
Liabilities
Accrued liabilities	195	1,379
Level 2 \| Foreign currency forward contracts \| Prepaid expenses and other current assets
Assets
Prepaid expenses and other current assets	30	124
Level 2 \| Short-term Investments \| Corporate debt securities
Assets
Investments	557,821	986,317
Level 2 \| Short-term Investments \| Asset-backed Securities
Assets
Investments	76,736	91,531
Level 2 \| Short-term Investments \| Foreign government and agency debt
Assets
Investments	21,358	28,110
Level 2 \| Short-term Investments \| Municipal debt securities
Assets
Investments	31,249	33,464
Level 2 \| Cash equivalents \| Time deposits
Assets
Cash equivalents	209,405	213,012
Level 2 \| Cash equivalents \| Corporate debt securities
Assets
Cash equivalents	54,689	21,999
Level 3
Assets
Total assets	11,296	10,226
Level 3 \| Long-term investments \| Auction rate securities
Assets
Investments	$ 11,296	$ 10,226

Change in Fair Values for Level Three Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 30, 2016	Jan. 31, 2015
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	$ 10,226	$ 16,279
Impairment loss	(1,204)
Sales, redemption and settlement		(3,650)
Transfer out		(3,000)
Unrealized gain included in accumulated other comprehensive income	2,274	597
Ending balance	$ 11,296	$ 10,226

Goodwill and Acquired Intangible Assets, Net - Additional Information (Detail) - USD ($)	12 Months Ended
	Jan. 30, 2016	Jan. 31, 2015	Feb. 01, 2014
Goodwill and Intangible Assets Disclosure [Line Items]
Goodwill acquired	$ 0	$ 0
Impairment of goodwill	$ 0
Percentage of goodwill, excess of fair value over carrying value	41.00%
Core technology
Goodwill and Intangible Assets Disclosure [Line Items]
Impairment and write-off intangible assets	$ 300,000
Trade names
Goodwill and Intangible Assets Disclosure [Line Items]
Impairment and write-off intangible assets	$ 300,000
IPR&D
Goodwill and Intangible Assets Disclosure [Line Items]
Impairment and write-off intangible assets		$ 3,386,000
Acquired intangible asset
Goodwill and Intangible Assets Disclosure [Line Items]
Impairment and write-off intangible assets			$ 8,100,000

Acquired Intangible Assets Net (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 30, 2016	Jan. 31, 2015
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amounts	$ 64,098	$ 66,248
Accumulated Amortization and Write-Offs	(46,088)	(35,550)
Net Carrying Amount	18,010	30,698
Purchased and core technology
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amounts, Finite-Lived	35,498	36,348
Accumulated Amortization and Write-Offs	(21,910)	(16,107)
Net Carrying Amounts, Finite-Lived	$ 13,588	20,241
Trade names
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Lives	5 years
Gross Carrying Amounts, Finite-Lived		1,300
Accumulated Amortization and Write-Offs		(828)
Net Carrying Amounts, Finite-Lived		472
Customer intangibles
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amounts, Finite-Lived	$ 28,600	28,600
Accumulated Amortization and Write-Offs	(24,178)	(18,615)
Net Carrying Amounts, Finite-Lived	$ 4,422	$ 9,985
Minimum \| Purchased and core technology
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Lives	4 years
Minimum \| Customer intangibles
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Lives	5 years
Maximum \| Purchased and core technology
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Lives	8 years
Maximum \| Customer intangibles
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Lives	7 years

Future Amortization Expense of Identified Intangibles (Detail) - In Process Research and Development Excluded $ in Thousands	Jan. 30, 2016 USD ($)
Fiscal Year
2017	$ 10,642
2018	5,508
2019	1,860
2020 and thereafter	0
Net Carrying Amounts, Finite-Lived	$ 18,010

Summary of Restructuring and Other Related Charges (Detail) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended					12 Months Ended
	May 31, 2015	Jan. 30, 2016	Oct. 31, 2015	Aug. 01, 2015	Aug. 02, 2014	May 03, 2014	Jan. 30, 2016	Jan. 31, 2015	Feb. 01, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring and other related charges							$ 53,251	$ 10,438	$ 4,732
Severance and related costs							43,926	5,181	2,786
Facilities and related costs							1,407	1,924	1,672
Loss on early contract termination							1,644	3,230
Other exit-related costs							534	86	213
Restructuring charges	$ 16,300	$ 4,400	$ 45,500	$ 13,000	$ 8,800	$ 8,500	47,511	10,421	4,671
Impairment and write-off of assets: Inventory			$ 8,000				8,046
Impairment and write-off of assets: Equipment and other							6,736	17	61
Restructuring Costs and Asset Impairment Charges							63,543	13,824	$ 4,732
Technology licenses
Restructuring Cost and Reserve [Line Items]
Impairment and write-off of assets: Intangible assets							1,250
IPR&D
Restructuring Cost and Reserve [Line Items]
Impairment and write-off of assets: Intangible assets								$ 3,386
Cost of goods sold
Restructuring Cost and Reserve [Line Items]
Restructuring charges							$ 10,292

Restructuring and Other Related Charges - Additional Information (Detail)	1 Months Ended		3 Months Ended					6 Months Ended	12 Months Ended
	Oct. 31, 2015 USD ($)	May 31, 2015 USD ($) Employee	Jan. 30, 2016 USD ($)	Oct. 31, 2015 USD ($)	Aug. 01, 2015 USD ($)	Aug. 02, 2014 USD ($)	May 03, 2014 USD ($)	Aug. 01, 2015 USD ($)	Jan. 30, 2016 USD ($) Employee	Jan. 31, 2015 USD ($)	Feb. 01, 2014 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring Costs and Asset Impairment Charges									$ 63,543,000	$ 13,824,000	$ 4,732,000
Restructuring charges		$ 16,300,000	$ 4,400,000	$ 45,500,000	$ 13,000,000	$ 8,800,000	$ 8,500,000		$ 47,511,000	10,421,000	$ 4,671,000
Number of employees paid severance and related benefit costs, and departed \| Employee									1,191
Restructuring and other related charges, expected additional charges			$ 5,000,000						$ 5,000,000
Total number of employees to be terminated \| Employee		358
Lease obligation vocation date		2015-07
Impairment charges of equipment held for sale								$ 1,400,000
Proceeds from equipment held for sale	$ 9,300,000								10,007,000
Gain or loss recognized upon sale of equipment held for sale	$ 0
Loss on early contract termination									1,644,000	3,230,000
Minimum
Restructuring Cost and Reserve [Line Items]
Total restructuring and other related charges, original estimate									100,000,000
Maximum
Restructuring Cost and Reserve [Line Items]
Total restructuring and other related charges, original estimate									130,000,000
Severance Pay Fund
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 15,100,000
Facilities and Related Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 1,200,000							1,407,000	$ 1,924,000
Vacated Facilities
Restructuring Cost and Reserve [Line Items]
Restructuring charges									1,400,000
Mobile and Wireless
Restructuring Cost and Reserve [Line Items]
Restructuring charges									$ 44,400,000
Number of employees paid severance and related benefit costs, and departed \| Employee									825
Number of employees retained \| Employee									140
Mobile and Wireless \| Retention Bonuses Offered
Restructuring Cost and Reserve [Line Items]
Number of employees retained \| Employee									128

Reconciliation of Beginning and Ending Restructuring Liability Balances by Major Type of Costs (Detail) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended					12 Months Ended
	May 31, 2015	Jan. 30, 2016	Oct. 31, 2015	Aug. 01, 2015	Aug. 02, 2014	May 03, 2014	Jan. 30, 2016	Jan. 31, 2015	Feb. 01, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring liabilities, beginning of balance						$ 2,453	$ 4,569	$ 2,453
Restructuring charges	$ 16,300	$ 4,400	$ 45,500	$ 13,000	$ 8,800	8,500	47,511	10,421	$ 4,671
Net cash payments							(48,102)	(8,305)
Exchange rate adjustment							(136)
Restructuring liabilities, ending balance		3,842					3,842	4,569	2,453
Severance and Related Costs
Restructuring Cost and Reserve [Line Items]
Restructuring liabilities, beginning of balance						51		51
Restructuring charges							43,926	5,181
Net cash payments							(42,741)	(5,232)
Exchange rate adjustment							(30)
Restructuring liabilities, ending balance		1,155					1,155		51
Facilities and Related Costs
Restructuring Cost and Reserve [Line Items]
Restructuring liabilities, beginning of balance						2,383	1,339	2,383
Restructuring charges	$ 1,200						1,407	1,924
Net cash payments							(1,597)	(2,968)
Exchange rate adjustment							(106)
Restructuring liabilities, ending balance		1,043					1,043	1,339	2,383
Other Exit-Related Costs
Restructuring Cost and Reserve [Line Items]
Restructuring liabilities, beginning of balance						$ 19	3,230	19
Restructuring charges							2,178	3,316
Net cash payments							(3,764)	(105)
Restructuring liabilities, ending balance		$ 1,644					$ 1,644	$ 3,230	$ 19

U.S. and Non-U.S. Components of Income Before Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 30, 2016	Jan. 31, 2015	Feb. 01, 2014
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest [Abstract]
U.S. operations	$ 33,787	$ 31,942	$ 31,339
Non-U.S. operations	(832,841)	400,211	274,918
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest, Total	$ (799,054)	$ 432,153	$ 306,257

Provision (Benefit) for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 30, 2016	Jan. 31, 2015	Feb. 01, 2014
Current income tax provision (benefit):
Federal	$ 10,756	$ 9,096	$ 5,774
State	83	(161)	73
Foreign	(4,589)	785	(18,829)
Total current income tax provision (benefit)	6,250	9,720	(12,982)
Deferred income tax provision (benefit):
Federal	(4,355)	(1,775)	317
State	580	16	32
Foreign	9,871	(11,154)	3,570
Total deferred income tax provision (benefit)	6,096	(12,913)	3,919
Total provision (benefit) for income taxes	$ 12,346	$ (3,193)	$ (9,063)

Income Taxes - Additional Information (Detail) - USD ($)		12 Months Ended
	Jan. 30, 2016	Jan. 30, 2016	Jan. 31, 2015	Feb. 01, 2014	Feb. 28, 2015
Income Taxes [Line Items]
Current income tax liability	$ 14,500,000	$ 14,500,000	$ 17,400,000	$ 13,200,000
Increase in current unrecognized tax benefits			7,400,000	9,100,000
Increase (decrease) in net deferred tax		(6,100,000)	12,900,000
Reduction in unrecognized tax benefits arising from the settlement of an audit and the expiration of statutes of limitation		20,600,000	16,400,000	31,800,000
Additional tax provision		3,100,000
Net reduction in unrecognized tax benefits		11,600,000
Net increase in current unrecognized tax benefits		9,000,000
Unrecognized tax benefits offset by deferred tax assets		6,300,000	4,200,000
Deferred tax assets, non-current	34,505,000	34,505,000	22,273,000
Valuation allowance	424,914,000	424,914,000	382,796,000
Increase in valuation allowance		$ 42,100,000
Valuation allowance commentary		At the end of fiscal 2016, the Company has recorded a valuation allowance of $424.9 million, an increase of $42.1 million from fiscal 2015. The Company has provided a full valuation allowance against its federal and various state research credits which it earns in excess of its current year tax liabilities, as well as a portion against its net operating loss carryforwards in the U.S. federal and California. Based on the available objective positive and negative evidence, the Company has determined that it is more likely than not that these research credits and net operating losses will not be realized.
Unrecognized tax benefit that would affect the effective income tax rate if recognized	27,800,000	$ 27,800,000
Unrecognized tax benefit, interest and penalties accrued	26,400,000	26,400,000	27,700,000	29,600,000
Interest and penalties related to unrecognized tax benefits included in consolidated statements of operation		4,600,000	3,800,000	6,200,000
Uncertain tax positions decrease from the lapse of the statutes of limitation in various jurisdictions during the next 12 months	(16,200,000)	(16,200,000)
Cash, Cash Equivalents and Short-term Investments	2,300,000,000	2,300,000,000
Undistributed earnings of foreign subsidiaries	620,000,000	620,000,000
Foreign Subsidiaries
Income Taxes [Line Items]
Cash, Cash Equivalents and Short-term Investments	830,000,000	830,000,000
Increase (decrease) in tax expense in the event of undistributed earnings needed by parent company or no longer considered indefinitely reinvested outside of Bermuda	200,000,000
Israeli Law of Approved or Benefited Enterprise
Income Taxes [Line Items]
Tax holidays, tax savings amount		$ 0	$ 0	$ 2,200,000
Tax holidays, per share effect on earnings		$ 0.00	$ 0.00	$ 0.01
Swiss Federal Department of Economy and the Vaud Cantonal Tax Administration Tax Holiday
Income Taxes [Line Items]
Expiration of tax exemption		10 years
Tax holidays, tax savings amount		$ 3,700,000	$ 4,500,000	$ 5,100,000
Swiss Federal Department of Economy and the Vaud Cantonal Tax Administration Tax Holiday \| Maximum
Income Taxes [Line Items]
Tax holidays, per share effect on earnings		$ 0.01	$ 0.01	$ 0.01
Non-U.S. Jurisdiction
Income Taxes [Line Items]
Net operating loss carryforwards	90,800,000	$ 90,800,000
Net operating loss carryforwards, expiration date		The majority of the Company's non-U.S. losses carry forward indefinitely
California
Income Taxes [Line Items]
Net operating loss carryforwards	$ 6,300,000	$ 6,300,000
California \| Maximum
Income Taxes [Line Items]
Net operating loss carryforwards, expiration date		2033
California \| Minimum
Income Taxes [Line Items]
Net operating loss carryforwards, expiration date		2018
Economic Development Board of Singapore Pioneer Status
Income Taxes [Line Items]
Expiration of tax exemption		10 years
Tax holidays, tax savings amount		$ 5,300,000	$ 100,000	$ 3,700,000
Economic Development Board of Singapore Pioneer Status \| Maximum
Income Taxes [Line Items]
Tax holidays, per share effect on earnings		$ 0.01	$ 0.01	$ 0.01
Economic Development Board of Singapore Pioneer Status \| Extended Expiration
Income Taxes [Line Items]
Expiration of tax exemption		15 years
Earliest Tax Year
Income Taxes [Line Items]
Tax year under examination by the state of California		2013
Latest Tax Year
Income Taxes [Line Items]
Tax year under examination by the state of California		2014
Chief Executive Officer
Income Taxes [Line Items]
Liability to related party					$ 15,400,000
Office of the Tax Commissioner, Bermuda
Income Taxes [Line Items]
Applicable statutory rate	0.00%	0.00%	0.00%	0.00%
Internal Revenue Service (IRS)
Income Taxes [Line Items]
Net operating loss carryforwards	$ 1,600,000	$ 1,600,000
Internal Revenue Service (IRS) \| Maximum
Income Taxes [Line Items]
Net operating loss carryforwards, expiration date		2028
Internal Revenue Service (IRS) \| Minimum
Income Taxes [Line Items]
Net operating loss carryforwards, expiration date		2022
Research \| California
Income Taxes [Line Items]
Tax credit carryforwards	260,600,000	$ 260,600,000
Tax credit carryforward, expiration dates		Which can be carryforward indefinitely
Net operating loss carryforwards, amount attributable to excess tax benefits from stock options	57,700,000	$ 57,700,000
Research \| Internal Revenue Service (IRS)
Income Taxes [Line Items]
Tax credit carryforwards	248,600,000	248,600,000
Net operating loss carryforwards, amount attributable to excess tax benefits from stock options	59,800,000	$ 59,800,000
Research \| Internal Revenue Service (IRS) \| Maximum
Income Taxes [Line Items]
Tax credit carryforward, expiration dates		2036
Research and Investment \| Other State
Income Taxes [Line Items]
Tax credit carryforwards	$ 21,600,000	$ 21,600,000
Research and Investment \| Other State \| Maximum
Income Taxes [Line Items]
Tax credit carryforward, expiration dates		2031

Deferred Tax Assets (Detail) - USD ($) $ in Thousands	Jan. 30, 2016	Jan. 31, 2015
Deferred tax assets:
Federal and California research and other tax credits	$ 414,662	$ 382,726
Reserves and accruals	35,200	35,538
Share-based compensation	4,476	4,502
Net operating losses	11,055	10,740
Gross deferred tax assets	465,393	433,506
Valuation allowance	(424,914)	(382,796)
Total deferred tax assets	40,479	50,710
Total deferred tax liabilities	(7,073)	(11,209)
Net deferred tax assets	$ 33,406	$ 39,501

Reconciliation between the Provision (Benefit) for Income Taxes at the Statutory Rate and the Effective Tax Rate (Detail)	12 Months Ended
	Jan. 30, 2016	Jan. 31, 2015	Feb. 01, 2014
Reconciliation of Statutory Federal Tax Rate [Line Items]
Provision at U.S. notional statutory rate	35.00%	35.00%	35.00%
Non-deductible share-based compensation	(5.90%)	11.20%	19.40%
Difference in U.S. and non-U.S. tax rates	(31.30%)	(46.00%)	(55.80%)
Benefits from utilization of general business credits	5.00%	(12.00%)	(14.10%)
Change in valuation allowance	(4.00%)	10.50%	11.90%
Other	(0.30%)	0.60%	0.60%
Effective tax rate	(1.50%)	(0.70%)	(3.00%)

Changes in Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 30, 2016	Jan. 31, 2015	Feb. 01, 2014
Income Tax Contingency [Line Items]
Unrecognized tax benefits as of the beginning of the period	$ 45,197	$ 51,682	$ 79,031
Increases related to prior year tax positions	304	976	499
Decreases related to prior year tax positions	(4,334)	(386)	(111)
Increases related to current year tax positions	4,237	5,356	2,666
Settlements	(704)		(7,423)
Lapse in the statute of limitations	(9,739)	(10,691)	(13,969)
Foreign exchange gain	(5,822)	(1,740)	(9,011)
Gross amounts of unrecognized tax benefits as of the end of the period	$ 29,139	$ 45,197	$ 51,682

Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions				1 Months Ended	3 Months Ended	12 Months Ended
	Feb. 29, 2016	Feb. 16, 2016	Dec. 26, 2012	Apr. 30, 2016	May 02, 2015	Jan. 30, 2016	Jan. 31, 2015	Feb. 01, 2014	Nov. 14, 2014
Commitments and Contingencies Disclosure [Line Items]
Standard warranty period						90 days
Extended warranty period						1 year
Description of extended warranty period						Warranty period can extend to more than one year based on contractual agreements.
Rent expense, net of sublease income						$ 23.8	$ 26.1	$ 25.8
Accrued liability related to legal proceedings						739.8
Loss contingency, awarded amount					$ 15.4
Carrying value of pledged assets						133.0
Surety Bond
Commitments and Contingencies Disclosure [Line Items]
Bond						$ 1,540.0			$ 216.0
Commitment Letter
Commitments and Contingencies Disclosure [Line Items]
Bond									$ 95.0
Carnegie Mellon Litigation
Commitments and Contingencies Disclosure [Line Items]
Date of lawsuit filed						Mar. 06, 2009
Loss contingency, awarded amount			$ 1,170.0			$ 1,540.0
Carnegie Mellon Litigation \| Subsequent Event
Commitments and Contingencies Disclosure [Line Items]
Amount agreed to pay pursuant to settlement	$ 750.0
Settlement Agreement and Patent License \| Subsequent Event
Commitments and Contingencies Disclosure [Line Items]
Amount agreed to pay pursuant to settlement		$ 750.0		$ 750.0
Primary Surety Bond \| Subsequent Event
Commitments and Contingencies Disclosure [Line Items]
Bond		439.0
Secondary Surety Bond \| Subsequent Event
Commitments and Contingencies Disclosure [Line Items]
Bond		$ 311.0
Manufacturing Expense
Commitments and Contingencies Disclosure [Line Items]
Purchase commitment, outstanding commitment						$ 136.8

Future Minimum Lease Payments, Net of Estimated Sublease Income under Operating and Capital Leases (Detail) $ in Thousands	Jan. 30, 2016 USD ($)
Fiscal Year:
2017	$ 63,296
2018	35,679
2019	24,407
2020	14,280
2021	2,939
Thereafter	4,946
Total future minimum lease payments	$ 145,547

Future Minimum Payments Under Technology License Obligations (Detail) - USD ($) $ in Thousands	Jan. 30, 2016	Jan. 31, 2015
Fiscal Year:
Less: current portion	$ (17,985)	$ (14,428)
Non-current portion	12,461	$ 16,468
Technology License Agreement
Fiscal Year:
2017	14,769
2018	12,630
2019 and thereafter	0
Total future minimum lease payments	27,399
Less: amount representing interest	(580)
Present value of future minimum payments	26,819
Less: current portion	(14,358)
Non-current portion	$ 12,461

Benefit Plans - Additional Information (Detail) - USD ($)	12 Months Ended
	Jan. 30, 2016	Jan. 31, 2015	Feb. 01, 2014
Defined Contribution Plans Non-U.S Locations
Defined Contribution Plan Disclosure [Line Items]
Employer match contributions	$ 14,500,000	$ 18,500,000	$ 20,500,000
Defined contribution plan, cost recognized	$ 1,500,000	100,000	100,000
401(k) Savings and Investment Plan
Defined Contribution Plan Disclosure [Line Items]
401(k) savings and investment plan, general description of the plan	The Company sponsors a 401(k) savings and investment plan that allows eligible U.S. employees to participate by making pre-tax contributions to the 401(k) plan ranging from 1% to 50% of eligible earnings subject to a required annual limit. The Company matches 100% of the employee contribution up to $500 per eligible employee on a quarterly basis.per quarter. The participant must be employed by the Company on the last day of the calendar quarter to qualify for the match. At the end of the calendar year, the eligible employees receive a true-up match equal to the accumulated employee contribution for the calendar year up to $2,000.
Defined contribution plan, cost recognized	$ 4,900,000	$ 5,100,000	$ 5,100,000
Employer match contributions percentage	100.00%
401(k) Savings and Investment Plan \| Minimum
Defined Contribution Plan Disclosure [Line Items]
Employee pre-tax contributions to 401(k)	1.00%
401(k) Savings and Investment Plan \| Maximum
Defined Contribution Plan Disclosure [Line Items]
Employee pre-tax contributions to 401(k)	50.00%
401(k) Savings and Investment Plan \| Quarterly Match \| Maximum
Defined Contribution Plan Disclosure [Line Items]
Employer match contributions	$ 500
401(k) Savings and Investment Plan \| Annual True Up Match \| Maximum
Defined Contribution Plan Disclosure [Line Items]
Employer match contributions	$ 2,000

Shareholders' Equity - Additional Information (Detail)

3 Months Ended

12 Months Ended

May 18, 2016

$ / shares

Apr. 01, 2016

Mar. 16, 2016

$ / shares

Apr. 01, 2015

Jan. 30, 2016

USD ($)

$ / shares

Jan. 30, 2016

USD ($)

Installment

$ / shares

Jan. 31, 2015

USD ($)

$ / shares

Feb. 01, 2014

USD ($)

$ / shares

Feb. 02, 2013

Jan. 28, 2012

USD ($)

Jan. 29, 2016

$ / shares

Aug. 31, 2010

USD ($)

Stockholders Equity Note [Line Items]

Common stock, shares authorized

992,000,000

Common stock, par value | $ / shares

$ 0.002

Preferred stock, shares authorized

8,000,000

Preferred stock, par value | $ / shares

$ 0.002

Preferred stock, shares outstanding

Equity awards, vesting percentage

200.00%

Closing stock price | $ / shares

$ 8.85

Stock-based compensation capitalized in inventory | $

$ 1,500,000

$ 1,700,000

Shares Granted

6,170,000

6,365,000

18,922,000

Share repurchase program, amount authorized | $

$ 3,250,000,000

$ 500,000,000

Share repurchase program, additional authorized amount | $

$ 2,750,000,000

Share repurchase program, shares repurchased

19,700,000

5,100,000

33,100,000

Share repurchase program, amount repurchased | $

$ 260,900,000

$ 65,000,000

$ 354,100,000

Share repurchase program, cumulative shares repurchased

241,600,000

Share repurchase program, total amount of repurchases | $

$ 3,100,000,000

Share repurchase program, remaining available for future share repurchases | $

182,600,000

$ 182,600,000

Dividend per share, declared | $ / shares

$ 0.24

Subsequent Event

Stockholders Equity Note [Line Items]

Dividend per share, declared | $ / shares

$ 0.06

Dividends declared, date to be paid

Jul. 12, 2016

Apr. 22, 2016

Dividends declared, date of record

Jun. 14, 2016

Mar. 29, 2016

Time Based Option Award

Stockholders Equity Note [Line Items]

Unamortized compensation expense | $

38,200,000

$ 38,200,000

Options vested and expected to vest, aggregate intrinsic value | $

6,700,000

Options exercisable, aggregate intrinsic value | $

6,600,000

Aggregate intrinsic value of stock options exercised | $

$ 9,700,000

$ 19,300,000

$ 51,100,000

Unrecognized share based compensation cost, weighted-average period of recognition

1 year 10 months 24 days

Shares Granted

6,170,000

6,365,000

18,922,000

Expected term (in years)

5 years 4 months 24 days

5 years

Performance Based Restricted Stock Unit

Stockholders Equity Note [Line Items]

Vested

360,723

658,000

3,000

Granted

669,000

^[1]

1,277,000

^[1]

100,000

Performance Based Restricted Stock Unit | Executive Officer

Stockholders Equity Note [Line Items]

Vested

478,001

Granted

107,954

Performance Based Restricted Stock Unit | April 1, 2015

Stockholders Equity Note [Line Items]

Performance awards vesting Date

Apr. 01, 2015

Performance Based Restricted Stock Unit | April 1, 2016

Stockholders Equity Note [Line Items]

Performance awards vesting Date

Apr. 01, 2016

Performance Based Restricted Stock Unit | Subsequent Event | Executive Officer

Stockholders Equity Note [Line Items]

Vested

33,616

Restricted Stock Units (RSUs)

Stockholders Equity Note [Line Items]

Unamortized compensation expense | $

53,200,000

$ 53,200,000

Unrecognized share based compensation cost, weighted-average period of recognition

1 year

Vested

5,797,000

5,941,000

3,925,000

Granted

6,765,000

6,811,000

3,828,000

Restricted stock units, aggregate intrinsic value | $

$ 81,700,000

Restricted stock units vested and expected to vest

9,200,000

Market Based Option Award

Stockholders Equity Note [Line Items]

Equity awards, expiration term

5 years

Options vested and expected to vest, aggregate intrinsic value | $

$ 0

Options vested and expected to vest, weighted average remaining contractual term (in years)

5 years 2 months 12 days

Shares Granted

3,100,000

Expected term (in years)

2 years 7 months 28 days

Employee Stock Option Plan, 1995 Plan

Stockholders Equity Note [Line Items]

Shares reserved for issuance, authorized

383,400,000

Equity awards, expiration term

10 years

Equity awards, number of installments | Installment

Number of shares available for future issuance

91,400,000

Employee Stock Option Plan, 1995 Plan | After One Year From Vesting Commencement Date

Stockholders Equity Note [Line Items]

Equity awards, vesting percentage

20.00%

Employee Stock Option Plan, 1995 Plan | Per Month Over Remaining Months

Stockholders Equity Note [Line Items]

Equity awards, vesting percentage

1.67%

Equity awards, vesting term

48 months

Employee Stock Option Plan, 1995 Plan | Performance Based Restricted Stock Unit

Stockholders Equity Note [Line Items]

Equity awards, vesting term

2 years

Employee Stock Option Plan, 1995 Plan | Performance Based Restricted Stock Unit | April 1, 2015

Stockholders Equity Note [Line Items]

Equity awards, vesting percentage

50.00%

Employee Stock Option Plan, 1995 Plan | Performance Based Restricted Stock Unit | April 1, 2016

Stockholders Equity Note [Line Items]

Equity awards, vesting percentage

50.00%

Employee Stock Option Plan, 1995 Plan | Incentive Stock Option

Stockholders Equity Note [Line Items]

Equity awards, expiration term

5 years

Stock option, purchase price as percentage of fair market value

110.00%

Employee Stock Option Plan, 1995 Plan | Financial Performance RSU | First Anniversary

Stockholders Equity Note [Line Items]

Equity awards, vesting percentage

50.00%

Employee Stock Option Plan, 1995 Plan | Financial Performance RSU | Second Anniversary

Stockholders Equity Note [Line Items]

Equity awards, vesting percentage

50.00%

Employee Stock Option Plan, 1995 Plan | Strategic Performance Award | First Anniversary

Stockholders Equity Note [Line Items]

Equity awards, vesting percentage

50.00%

Employee Stock Option Plan, 1995 Plan | Strategic Performance Award | Second Anniversary

Stockholders Equity Note [Line Items]

Equity awards, vesting percentage

50.00%

Employee Stock Purchase Plan, 2000 Restated Plan

Stockholders Equity Note [Line Items]

Number of shares available for future issuance

16,600,000

Employee stock purchase plan, maximum subscription rate

15.00%

Employee stock purchase plan, "look-back" period

24 months

Employee stock purchase plan, percentage discount of purchase price per share of common shares

85.00%

Employee stock purchase plan, shares issued

5,900,000

9,700,000

Employee stock purchase plan, weighted-average price | $ / shares

$ 10.00

$ 7.67

$ 7.39

Unamortized compensation expense | $

$ 47,400,000

Employee Stock Purchase Plan, 2000 Plan

Stockholders Equity Note [Line Items]

Employee stock purchase plan, "look-back" period

6 months

Director Stock Incentive Plan, 2007 Plan

Stockholders Equity Note [Line Items]

Shares reserved for issuance, authorized

750,000

Number of shares available for future issuance

77,952

Stock option award | $

$ 110,000

Director Stock Incentive Plan, 2007 Plan | Restricted Stock Units (RSUs)

Stockholders Equity Note [Line Items]

Equity awards, vesting percentage

100.00%

Equity awards, aggregate fair market value | $

$ 110,000

Director Stock Incentive Plan, 2007 Plan | Restricted Stock Units (RSUs) | Fiscal 2015

Stockholders Equity Note [Line Items]

Equity awards, vesting percentage

100.00%

Equity awards, aggregate fair market value | $

$ 220,000

Director Stock Incentive Plan, 2007 Plan | Restricted Stock Units (RSUs) | Maximum

Stockholders Equity Note [Line Items]

Number of shares authorized to a director

10,000

Director Stock Incentive Plan, 2007 Plan | Restricted Stock Units (RSUs) | Maximum | Fiscal 2015

Stockholders Equity Note [Line Items]

Number of shares authorized to a director

20,000

Director Stock Incentive Plan, 2007 Plan | Employee Stock Option

Stockholders Equity Note [Line Items]

Equity awards, expiration term

10 years

Director Stock Incentive Plan, 2007 Plan | Employee Stock Option | Maximum

Stockholders Equity Note [Line Items]

Number of shares authorized to a director

25,000

[1]	Amounts represent the target number of restricted stock units at grant date. For awards granted to our executive officers, up to 200% of the target restricted stock units may vest if the maximum level for financial and strategic goals is achieved.

Stock Option Plan Activity (Detail) - $ / shares	12 Months Ended
Stock Option Plan Activity (Detail) - $ / shares	Jan. 30, 2016	Jan. 31, 2015	Feb. 01, 2014	Feb. 02, 2013	Jan. 28, 2012
Options Outstanding
Beginning Balance	49,372,000	51,779,000	52,396,000
Granted	6,170,000	6,365,000	18,922,000
Exercised	(2,225,000)	(3,732,000)	(15,482,000)
Canceled/Forfeited	(10,287,000)	(5,040,000)	(4,057,000)
Ending Balance	43,030,000	49,372,000	51,779,000	52,396,000
Weighted Average Exercise Price
Beginning Balance	$ 13.88	$ 13.51	$ 13.39
Granted	14.13	15.33	10.82
Exercised	9.79	10.19	9.40
Canceled/Forfeited	15.68	14.72	15.16
Balance at February 1, 2014	$ 13.68	$ 13.88	$ 13.51	$ 13.39
Time Based Option Award
Options Outstanding
Beginning Balance	47,140,000	49,156,000	49,637,000
Granted	6,170,000	6,365,000	18,922,000
Exercised	(2,225,000)	(3,732,000)	(15,482,000)
Canceled/Forfeited	(10,211,000)	(4,649,000)	(3,921,000)
Ending Balance	40,874,000	47,140,000	49,156,000	49,637,000
Vested or expected to vest at January 30, 2016	38,773,000
Weighted Average Exercise Price
Beginning Balance	$ 13.79	$ 13.40	$ 13.28
Granted	14.13	15.33	10.82
Exercised	9.79	10.19	9.40
Canceled/Forfeited	15.68	14.66	15.15
Balance at February 1, 2014	13.59	$ 13.79	$ 13.40	$ 13.28
Vested or expected to vest at January 30, 2016	$ 13.58
Market Based Option Award
Options Outstanding
Beginning Balance	2,232,000	2,623,000	2,759,000
Granted	3,100,000	0	0	0	0
Canceled/Forfeited	(76,000)	(391,000)	(136,000)
Ending Balance	2,156,000	2,232,000	2,623,000	2,759,000
Weighted Average Exercise Price
Beginning Balance	$ 15.43	$ 15.43	$ 15.43
Canceled/Forfeited	15.43	15.43	15.43
Balance at February 1, 2014	$ 15.43	$ 15.43	$ 15.43	$ 15.43

Schedule of Outstanding Options and Exercisable Options Information, by Range of Exercise Prices (Detail) shares in Thousands	12 Months Ended
	Jan. 30, 2016 $ / shares shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Outstanding Options, Number of Shares \| shares	43,030
Outstanding Options, Weighted Average Remaining Contractual Term (in Years)	5 years 9 months 7 days
Outstanding Options, Weighted Average Exercise Prices	$ 13.68
Exercisable Options, Number of Shares \| shares	21,223
Exercisable Options, Weighted Average Exercise Prices	$ 14.13
Range One
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, lower limit	5.70
Range of Exercise Prices, upper limit	$ 9.49
Outstanding Options, Number of Shares \| shares	3,673
Outstanding Options, Weighted Average Remaining Contractual Term (in Years)	3 years 4 months 17 days
Outstanding Options, Weighted Average Exercise Prices	$ 7.04
Exercisable Options, Number of Shares \| shares	3,386
Exercisable Options, Weighted Average Exercise Prices	$ 6.89
Range Two
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, lower limit	10.31
Range of Exercise Prices, upper limit	$ 10.76
Outstanding Options, Number of Shares \| shares	11,574
Outstanding Options, Weighted Average Remaining Contractual Term (in Years)	7 years 1 month 2 days
Outstanding Options, Weighted Average Exercise Prices	$ 10.76
Exercisable Options, Number of Shares \| shares	3,570
Exercisable Options, Weighted Average Exercise Prices	$ 10.76
Range Three
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, lower limit	10.80
Range of Exercise Prices, upper limit	$ 14.35
Outstanding Options, Number of Shares \| shares	9,275
Outstanding Options, Weighted Average Remaining Contractual Term (in Years)	6 years 7 months 6 days
Outstanding Options, Weighted Average Exercise Prices	$ 13.25
Exercisable Options, Number of Shares \| shares	3,661
Exercisable Options, Weighted Average Exercise Prices	$ 12.06
Range Four
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, lower limit	14.45
Range of Exercise Prices, upper limit	$ 15.43
Outstanding Options, Number of Shares \| shares	9,842
Outstanding Options, Weighted Average Remaining Contractual Term (in Years)	6 years 26 days
Outstanding Options, Weighted Average Exercise Prices	$ 15.16
Exercisable Options, Number of Shares \| shares	4,843
Exercisable Options, Weighted Average Exercise Prices	$ 15.26
Range Five
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, lower limit	15.43
Range of Exercise Prices, upper limit	$ 34.38
Outstanding Options, Number of Shares \| shares	8,666
Outstanding Options, Weighted Average Remaining Contractual Term (in Years)	3 years 9 months 18 days
Outstanding Options, Weighted Average Exercise Prices	$ 19.18
Exercisable Options, Number of Shares \| shares	5,763
Exercisable Options, Weighted Average Exercise Prices	$ 20.85

Activity Related to Non Vested Portion of Restricted Stock Units (Detail) - $ / shares

12 Months Ended

Apr. 01, 2015

Jan. 30, 2016

Jan. 31, 2015

Feb. 01, 2014

Time Based Restricted Units

Restricted Stock Units Outstanding

Beginning Balance

9,748,000

11,254,000

12,739,000

Granted

5,689,000

5,534,000

3,728,000

Vested

(5,139,000)

(5,938,000)

(3,925,000)

Canceled/Forfeited

(1,955,000)

(1,102,000)

(1,288,000)

Ending Balance

8,343,000

9,748,000

11,254,000

Weighted Average Grant Date Fair Value

Beginning Balance

$ 14.84

$ 14.14

$ 15.78

Granted

12.88

15.20

10.79

Vested

15.06

13.96

16.19

Canceled/Forfeited

13.99

14.32

14.39

Ending Balance

$ 13.57

$ 14.84

$ 14.14

Performance Based Restricted Stock Unit

Restricted Stock Units Outstanding

Beginning Balance

1,254,000

100,000

Granted

669,000

^[1]

1,277,000

^[1]

100,000

Vested

(360,723)

(658,000)

(3,000)

Canceled/Forfeited

(288,000)

(120,000)

Ending Balance

977,000

1,254,000

100,000

Weighted Average Grant Date Fair Value

Beginning Balance

$ 14.99

$ 10.52

Granted

14.08

14.98

$ 10.52

Vested

15.15

10.52

Canceled/Forfeited

14.39

11.23

Ending Balance

$ 14.43

$ 14.99

$ 10.52

Market Based Restricted Stock Unit

Restricted Stock Units Outstanding

Granted

^[1]

407,000

Canceled/Forfeited

(54,000)

Ending Balance

353,000

Weighted Average Grant Date Fair Value

Granted

$ 12.24

Canceled/Forfeited

$ 12.24

Restricted Stock Units (RSUs)

Restricted Stock Units Outstanding

Beginning Balance

11,002,000

11,354,000

12,739,000

Granted

6,765,000

6,811,000

3,828,000

Vested

(5,797,000)

(5,941,000)

(3,925,000)

Canceled/Forfeited

(2,297,000)

(1,222,000)

(1,288,000)

Ending Balance

9,673,000

11,002,000

11,354,000

Weighted Average Grant Date Fair Value

Beginning Balance

$ 14.85

$ 14.11

$ 15.78

Granted

12.96

15.16

10.78

Vested

15.07

13.96

16.19

Canceled/Forfeited

14.00

14.02

14.39

Ending Balance

$ 13.61

$ 14.85

$ 14.11

[1]	Amounts represent the target number of restricted stock units at grant date. For awards granted to our executive officers, up to 200% of the target restricted stock units may vest if the maximum level for financial and strategic goals is achieved.

Activity Related to Non Vested Portion of Restricted Stock Units (Parenthetical) (Detail)	12 Months Ended
	Jan. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock unit vested	200.00%

Total Stock Compensation by Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 30, 2016	Jan. 31, 2015	Feb. 01, 2014
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	$ 133,779	$ 137,246	$ 155,873
Cost of goods sold
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	7,916	7,972	8,863
Research and development
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	98,792	94,432	109,432
Selling and marketing
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	11,106	11,469	13,940
General and administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	$ 15,965	$ 23,373	$ 23,638

Weighted Average Assumptions Used to Calculate Fair Value of Time Based Stock Option Award (Detail) - Time Based Option Award - $ / shares	12 Months Ended
	Jan. 30, 2016	Jan. 31, 2015	Feb. 01, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average fair value	$ 3.93	$ 4.35	$ 3.43
Expected volatility	34.00%	35.00%	45.00%
Expected term (in years)	5 years 4 months 24 days	5 years	5 years
Risk-free interest rate	1.60%	1.60%	0.80%
Expected dividend yield	1.80%	1.60%	2.40%

Weighted Average Assumptions Used to Calculate Fair Value Awards for Employee Stock Purchase Plan (Detail) - Employee Stock Purchase Plan - $ / shares	12 Months Ended
	Jan. 30, 2016	Jan. 31, 2015	Feb. 01, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Estimated fair value	$ 3.24	$ 4.10	$ 3.65
Expected volatility	41.00%	30.00%	37.00%
Expected term (in years)	1 year 3 months 18 days	1 year 3 months 18 days	1 year 3 months 18 days
Risk-free interest rate	0.60%	0.30%	0.20%
Expected dividend yield	2.40%	1.60%	2.00%

Weighted Average Assumptions Used to Calculate Fair Value Awards of Total Shareholder Return Awards (Detail) - Total Shareholder Return	12 Months Ended
	Jan. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (in years)	2 years
Expected volatility	27.00%
Average correlation coefficient of peer companies	0.40%
Risk-free interest rate	0.50%
Expected dividend yield	1.70%

Schedule of Cash Dividends (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jan. 30, 2016	Jan. 31, 2015	Feb. 01, 2014
Cash dividend
Cash dividend per share	$ 0.24	$ 0.24	$ 0.24
Total payment to shareholders (in thousands)	$ 122,821	$ 122,801	$ 119,449

Segment and Geographic Information - Additional Information (Detail)	12 Months Ended
	Jan. 30, 2016 Segment
Segment Reporting Information [Line Items]
Number of reportable segment	1

Net Revenue and Long-Lived Asset Information based on Geographic Region (Detail) - USD ($)
$ in Thousands

3 Months Ended

12 Months Ended

Jan. 30, 2016

Oct. 31, 2015

^[2]

Aug. 01, 2015

^[3]

May 02, 2015

^[4]

Jan. 31, 2015

Nov. 01, 2014

^[6]

Aug. 02, 2014

^[7]

May 03, 2014

^[8]

Jan. 30, 2016

Jan. 31, 2015

Feb. 01, 2014

Revenues from External Customers and Long-Lived Assets [Line Items]

Net revenue

$ 616,158

^[1]

$ 674,890

$ 710,492

$ 724,288

$ 857,452

^[5]

$ 930,136

$ 961,545

$ 957,830

$ 2,725,828

$ 3,706,963

$ 3,404,400

Property and equipment, net

299,540

340,639

299,540

340,639

United States

Revenues from External Customers and Long-Lived Assets [Line Items]

Net revenue

42,854

62,333

68,321

Property and equipment, net

173,537

186,321

173,537

186,321

China

Revenues from External Customers and Long-Lived Assets [Line Items]

Net revenue

1,569,147

2,214,876

1,869,381

Property and equipment, net

22,917

25,910

22,917

25,910

Thailand

Revenues from External Customers and Long-Lived Assets [Line Items]

Net revenue

189,299

294,706

353,363

Malaysia

Revenues from External Customers and Long-Lived Assets [Line Items]

Net revenue

302,953

377,903

352,756

Philippines

Revenues from External Customers and Long-Lived Assets [Line Items]

Net revenue

211,602

254,381

257,899

Others

Revenues from External Customers and Long-Lived Assets [Line Items]

Net revenue

409,973

502,764

$ 502,680

Property and equipment, net

15,683

19,106

15,683

19,106

Bermuda

Revenues from External Customers and Long-Lived Assets [Line Items]

Property and equipment, net

3,093

3,358

3,093

3,358

Israel

Revenues from External Customers and Long-Lived Assets [Line Items]

Property and equipment, net

15,069

26,728

15,069

26,728

Singapore

Revenues from External Customers and Long-Lived Assets [Line Items]

Property and equipment, net

$ 69,241

$ 79,216

$ 69,241

$ 79,216

[1]	The fourth quarter of fiscal 2016 includes $4.4 million of restructuring and other related charges, $3.8 million related to the settlement of litigation matters including a charge for the settlement reached with CMU (see "Note 15 - Subsequent Events" in the Notes to the Consolidated Financial Statements) and $2.9 million of costs for the surety bonds related to the litigation with CMU.
[2]	The third quarter of fiscal 2016 includes $45.5 million of restructuring and other related charges that include $8.0 million for the write down of inventory and $6.2 million for the impairment of equipment and other assets due to the restructuring of the mobile platform business, and $2.9 million of costs for the surety bonds related to the litigation with CMU.
[3]	The second quarter of fiscal 2016 includes a $745.6 million charge for litigation matters recognized by the Company including the settlement reached with CMU (see "Note 15 - Subsequent Events" in the Notes to the Consolidated Financial Statements) and certain other pending litigation, $13.0 million of restructuring and other related charges, and $2.7 million of costs for the surety bonds related to the litigation with CMU.
[4]	The first quarter of fiscal 2016 includes a charge for a cash payment authorized by our Board of Directors of $15.4 million to Dr. Sehat Sutardja (see "Note 14 - Related Party Transactions" in the Notes to the Consolidated Financial Statements) and $2.9 million of costs for the surety bonds related to the litigation with CMU.
[5]	The fourth quarter of fiscal 2015 includes $3.4 million of restructuring and other exit-related costs, and $2.8 million of costs for the surety bonds related to the litigation with CMU.
[6]	The third quarter of fiscal 2015 includes $2.3 million of costs for the surety bonds related to the litigation with CMU.
[7]	The second quarter of fiscal 2015 includes an $8.8 million gain from the sale of an investment and $2.2 million of costs for the surety bonds related to the litigation with CMU.
[8]	The first quarter of fiscal 2015 includes $8.5 million of restructuring and other exit-related costs that includes a $3.4 million write-off of IPR&D.

Net Revenue by End Market (Detail) - USD ($)
$ in Thousands

3 Months Ended

12 Months Ended

Jan. 30, 2016

^[1]

Oct. 31, 2015

^[2]

Aug. 01, 2015

^[3]

May 02, 2015

^[4]

Jan. 31, 2015

^[5]

Nov. 01, 2014

^[6]

Aug. 02, 2014

^[7]

May 03, 2014

^[8]

Jan. 30, 2016

Jan. 31, 2015

Feb. 01, 2014

Revenue from External Customer [Line Items]

Net revenue

$ 616,158

$ 674,890

$ 710,492

$ 724,288

$ 857,452

$ 930,136

$ 961,545

$ 957,830

$ 2,725,828

$ 3,706,963

$ 3,404,400

Storage

Revenue from External Customer [Line Items]

Net revenue

1,201,378

1,744,656

1,681,953

Mobile and Wireless

Revenue from External Customer [Line Items]

Net revenue

786,239

1,071,777

839,407

Networking

Revenue from External Customer [Line Items]

Net revenue

551,743

674,701

670,249

Other products

Revenue from External Customer [Line Items]

Net revenue

$ 186,468

$ 215,829

$ 212,791

[1]	The fourth quarter of fiscal 2016 includes $4.4 million of restructuring and other related charges, $3.8 million related to the settlement of litigation matters including a charge for the settlement reached with CMU (see "Note 15 - Subsequent Events" in the Notes to the Consolidated Financial Statements) and $2.9 million of costs for the surety bonds related to the litigation with CMU.
[2]	The third quarter of fiscal 2016 includes $45.5 million of restructuring and other related charges that include $8.0 million for the write down of inventory and $6.2 million for the impairment of equipment and other assets due to the restructuring of the mobile platform business, and $2.9 million of costs for the surety bonds related to the litigation with CMU.
[3]	The second quarter of fiscal 2016 includes a $745.6 million charge for litigation matters recognized by the Company including the settlement reached with CMU (see "Note 15 - Subsequent Events" in the Notes to the Consolidated Financial Statements) and certain other pending litigation, $13.0 million of restructuring and other related charges, and $2.7 million of costs for the surety bonds related to the litigation with CMU.
[4]	The first quarter of fiscal 2016 includes a charge for a cash payment authorized by our Board of Directors of $15.4 million to Dr. Sehat Sutardja (see "Note 14 - Related Party Transactions" in the Notes to the Consolidated Financial Statements) and $2.9 million of costs for the surety bonds related to the litigation with CMU.
[5]	The fourth quarter of fiscal 2015 includes $3.4 million of restructuring and other exit-related costs, and $2.8 million of costs for the surety bonds related to the litigation with CMU.
[6]	The third quarter of fiscal 2015 includes $2.3 million of costs for the surety bonds related to the litigation with CMU.
[7]	The second quarter of fiscal 2015 includes an $8.8 million gain from the sale of an investment and $2.2 million of costs for the surety bonds related to the litigation with CMU.
[8]	The first quarter of fiscal 2015 includes $8.5 million of restructuring and other exit-related costs that includes a $3.4 million write-off of IPR&D.

Related Party Transactions - Additional Information (Detail) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Dec. 31, 2012	Jan. 30, 2016	Jan. 31, 2015	Feb. 01, 2014	Feb. 28, 2015
Related Party Transaction [Line Items]
Technology license agreement, renewed term		3 years
Chief Executive Officer
Related Party Transaction [Line Items]
Amount of transactions with related parties		$ 8.4
Liability to related party		$ 7.0			$ 15.4
Veri Silicon Holdings Company Limited \| Technology License Agreement
Related Party Transaction [Line Items]
License Agreement		MIL is party to a technology license agreement with VeriSilicon Holdings Co., Ltd. ("VeriSilicon"). MIL assumed the technology license agreement between VeriSilicon and UTStarcom, Inc. after the Company's acquisition of the semiconductor business of UTStarcom in December 2005. MIL has subsequently entered into various addenda to the agreement for additional technology beyond the scope of the original agreement. In addition, in September 2010, MIL entered into a services agreement with VeriSilicon, pursuant to which VeriSilicon has agreed to provide design support services to MIL. Under the services agreement, VeriSilicon helped on three projects for MIL during fiscal 2013.
Liability to related party		$ 0.3
Veri Silicon Holdings Company Limited \| Technology License Agreement \| License and Support Fees
Related Party Transaction [Line Items]
Amount of transactions with related parties		$ 1.8	$ 3.7	$ 2.0
Vivante Corporation \| Technology License Agreement
Related Party Transaction [Line Items]
License Agreement		In December 2009, MIL entered into a technology license agreement with Vivante Corporation ("Vivante") that provides for the license of graphics technology and associated services. This agreement restates, expands and succeeds previous agreements between the parties for the same technology.
Vivante Corporation \| Restated Technology Agreement
Related Party Transaction [Line Items]
Liability to related party		$ 1.5
Vivante Corporation \| Restated Technology Agreement \| License and Support Fees
Related Party Transaction [Line Items]
Amount of transactions with related parties		$ 4.0	$ 9.1	$ 6.9
Vivante Corporation \| Restated Technology Agreement \| License Fees
Related Party Transaction [Line Items]
Amount of transactions with related parties	$ 13.0
Payment period	3 years
Vivante Corporation \| Restated Technology Agreement \| Support Fees
Related Party Transaction [Line Items]
Payment period	3 years
Maintenance fees	10.00%

Subsequent Events - Additional Information (Detail) $ in Millions			1 Months Ended	12 Months Ended
	Feb. 29, 2016 USD ($)	Feb. 16, 2016 USD ($)	Apr. 30, 2016 USD ($) Director	Jan. 30, 2016
Subsequent Event \| Starboard Value LP
Subsequent Event [Line Items]
Number of independent directors \| Director			4
Carnegie Mellon Litigation \| Future license settlement
Subsequent Event [Line Items]
License expiration period				February 2016 through April 2018.
Carnegie Mellon Litigation \| Subsequent Event
Subsequent Event [Line Items]
Litigation settlement, amount	$ 750.0
Carnegie Mellon Litigation \| Subsequent Event \| Mutual release of claims and covenant not to sue provisions \| Operating Expense
Subsequent Event [Line Items]
Litigation settlement, amount	654.7
Carnegie Mellon Litigation \| Subsequent Event \| Licensing of intellectual property \| Cost of goods sold
Subsequent Event [Line Items]
Litigation settlement, amount	81.3
Carnegie Mellon Litigation \| Subsequent Event \| Future license settlement \| Cost of Goods Sold for Past Use
Subsequent Event [Line Items]
Litigation settlement, amount	$ 14.0
Settlement Agreement and Patent License \| Subsequent Event
Subsequent Event [Line Items]
Litigation settlement, amount		$ 750.0	$ 750.0
Litigation Settlement amount paid			$ 750.0

Quarterly Unaudited Consolidated Statements of Operations Data (Detail) - USD ($)
$ / shares in Units, $ in Thousands

3 Months Ended

12 Months Ended

Jan. 30, 2016

^[1]

Oct. 31, 2015

^[2]

Aug. 01, 2015

^[3]

May 02, 2015

^[4]

Jan. 31, 2015

^[5]

Nov. 01, 2014

^[6]

Aug. 02, 2014

^[7]

May 03, 2014

^[8]

Jan. 30, 2016

Jan. 31, 2015

Feb. 01, 2014

Quarterly Financial Information [Line Items]

Net revenue

$ 616,158

$ 674,890

$ 710,492

$ 724,288

$ 857,452

$ 930,136

$ 961,545

$ 957,830

$ 2,725,828

$ 3,706,963

$ 3,404,400

Gross profit

313,548

295,636

248,773

373,135

440,321

475,162

483,804

463,970

Net income (loss)

$ 4,200

$ (57,750)

$ (771,940)

$ 14,090

$ 81,693

$ 115,304

$ 138,870

$ 99,479

$ (811,400)

$ 435,346

$ 315,320

Net income (loss) per share:

Basic

$ 0.01

$ (0.11)

$ (1.49)

$ 0.03

$ 0.16

$ 0.22

$ 0.27

$ 0.20

$ (1.59)

$ 0.85

$ 0.64

Diluted

$ 0.01

$ (0.11)

$ (1.49)

$ 0.03

$ 0.16

$ 0.22

$ 0.27

$ 0.19

$ (1.59)

$ 0.84

$ 0.63

[1]	The fourth quarter of fiscal 2016 includes $4.4 million of restructuring and other related charges, $3.8 million related to the settlement of litigation matters including a charge for the settlement reached with CMU (see "Note 15 - Subsequent Events" in the Notes to the Consolidated Financial Statements) and $2.9 million of costs for the surety bonds related to the litigation with CMU.
[2]	The third quarter of fiscal 2016 includes $45.5 million of restructuring and other related charges that include $8.0 million for the write down of inventory and $6.2 million for the impairment of equipment and other assets due to the restructuring of the mobile platform business, and $2.9 million of costs for the surety bonds related to the litigation with CMU.
[3]	The second quarter of fiscal 2016 includes a $745.6 million charge for litigation matters recognized by the Company including the settlement reached with CMU (see "Note 15 - Subsequent Events" in the Notes to the Consolidated Financial Statements) and certain other pending litigation, $13.0 million of restructuring and other related charges, and $2.7 million of costs for the surety bonds related to the litigation with CMU.
[4]	The first quarter of fiscal 2016 includes a charge for a cash payment authorized by our Board of Directors of $15.4 million to Dr. Sehat Sutardja (see "Note 14 - Related Party Transactions" in the Notes to the Consolidated Financial Statements) and $2.9 million of costs for the surety bonds related to the litigation with CMU.
[5]	The fourth quarter of fiscal 2015 includes $3.4 million of restructuring and other exit-related costs, and $2.8 million of costs for the surety bonds related to the litigation with CMU.
[6]	The third quarter of fiscal 2015 includes $2.3 million of costs for the surety bonds related to the litigation with CMU.
[7]	The second quarter of fiscal 2015 includes an $8.8 million gain from the sale of an investment and $2.2 million of costs for the surety bonds related to the litigation with CMU.
[8]	The first quarter of fiscal 2015 includes $8.5 million of restructuring and other exit-related costs that includes a $3.4 million write-off of IPR&D.

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

+ References + Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References + Details

Quarterly Unaudited Consolidated Statements of Operations Data (Parenthetical) (Detail) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended								12 Months Ended
	May 31, 2015	Jan. 30, 2016	Oct. 31, 2015	Aug. 01, 2015	May 02, 2015	Jan. 31, 2015	Nov. 01, 2014	Aug. 02, 2014	May 03, 2014	Jan. 30, 2016	Jan. 31, 2015	Feb. 01, 2014
Quarterly Financial Information [Line Items]
Litigation settlements		$ 3,800		$ 745,600		$ 3,400				$ 654,667
Cash payment approved for Chief Executive Officer					$ 15,400
Restructuring charges	$ 16,300	4,400	$ 45,500	13,000				$ 8,800	$ 8,500	47,511	$ 10,421	$ 4,671
Write down of inventory			8,000							$ 8,046
Write off of IPR&D									$ 3,400
Impairment of equipment and other assets			6,200
Costs associated with the surety bond related to the litigation with Carnegie Mellon University		$ 2,900	$ 2,900	$ 2,700	$ 2,900	$ 2,800	$ 2,300	$ 2,200

SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 30, 2016	Jan. 31, 2015	Feb. 01, 2014
Allowance for doubtful accounts and sales return reserve
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	$ 2,112	$ 2,294	$ 7,921
Additions	2,614	3,041	3,808
Deductions	(1,964)	(3,223)	(9,435)
Balance at End of Year	2,762	2,112	2,294
Deferred tax valuation
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	382,796	335,890	299,449
Additions	42,118	46,906	36,441
Balance at End of Year	$ 424,914	$ 382,796	$ 335,890