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Document and Entity Information - shares shares in Millions	6 Months Ended
Document and Entity Information - shares shares in Millions	Aug. 04, 2018	Sep. 05, 2018
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Aug. 04, 2018
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Trading Symbol	MRVL
Entity Registrant Name	MARVELL TECHNOLOGY GROUP LTD
Entity Central Index Key	0001058057
Current Fiscal Year End Date	--02-02
Entity File Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		658.4

UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Aug. 04, 2018	Feb. 03, 2018
Current assets:
Cash and cash equivalents	$ 498,659	$ 888,482
Short-term investments	25,000	952,790
Accounts receivable, net	443,276	280,395
Inventories	473,429	170,039
Prepaid expenses and other current assets	72,388	41,482
Assets held for sale	31,182	30,767
Total current assets	1,543,934	2,363,955
Property and equipment, net	327,645	202,222
Goodwill	5,497,608	1,993,310
Acquired intangible assets, net	2,718,061	0
Other non-current assets	275,598	148,800
Total assets	10,362,846	4,708,287
Current liabilities:
Accounts payable	196,297	145,236
Accrued liabilities	277,098	86,958
Accrued employee compensation	127,381	127,711
Deferred income	3,511	61,237
Liabilities held for sale	3,935	0
Total current liabilities	608,222	421,142
Long-term debt	1,878,617	0
Non-current income taxes payable	52,438	56,976
Deferred tax liabilities	114,312	52,204
Other non-current liabilities	44,191	36,552
Total liabilities	2,697,780	566,874
Commitments and contingencies (Note 12)
Shareholders’ equity:
Common shares, $0.002 par value	1,316	991
Additional paid-in capital	6,153,890	2,733,292
Accumulated other comprehensive loss	0	(2,322)
Retained earnings	1,509,860	1,409,452
Total shareholders’ equity	7,665,066	4,141,413
Total liabilities and shareholders’ equity	$ 10,362,846	$ 4,708,287

UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Aug. 04, 2018	Feb. 03, 2018
Statement of Financial Position [Abstract]
Common shares, par value (in usd per share)	$ 0.002	$ 0.002

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 04, 2018	Jul. 29, 2017	Aug. 04, 2018	Jul. 29, 2017
Income Statement [Abstract]
Net revenue	$ 665,310	$ 604,750	$ 1,269,941	$ 1,177,459
Cost of goods sold	288,200	239,572	517,138	466,770
Gross profit	377,110	365,178	752,803	710,689
Operating expenses:
Research and development	216,285	180,871	393,019	368,967
Selling, general and administrative	133,701	55,659	206,014	110,763
Restructuring related charges	35,415	4,285	36,982	5,171
Total operating expenses	385,401	240,815	636,015	484,901
Operating income (loss) from continuing operations	(8,291)	124,363	116,788	225,788
Interest income	3,575	3,830	9,644	7,342
Interest expense	(15,795)	(80)	(16,039)	(131)
Other income (loss), net	(2,701)	3,438	(1,230)	3,310
Interest and other income (loss), net	(14,921)	7,188	(7,625)	10,521
Income (loss) from continuing operations before income taxes	(23,212)	131,551	109,163	236,309
Provision (benefit) for income taxes	(29,971)	(3,899)	(26,208)	1,267
Income from continuing operations, net of tax	6,759	135,450	135,371	235,042
Income from discontinued operations, net of tax	0	29,809	0	36,838
Net income	$ 6,759	$ 165,259	$ 135,371	$ 271,880
Net income per share - Basic:
Continuing operations (in usd per share)	$ 0.01	$ 0.27	$ 0.26	$ 0.47
Discontinued operations (in usd per share)	0.00	0.06	0.00	0.07
Net income per share - Basic (in usd per share)	0.01	0.33	0.26	0.54
Net income per share - Diluted:
Continuing operations (in usd per share)	0.01	0.26	0.25	0.46
Discontinued operations (in usd per share)	0.00	0.06	0.00	0.07
Net income per share - Diluted (in usd per share)	$ 0.01	$ 0.32	$ 0.25	$ 0.53
Weighted average shares:
Basic (in shares)	552,238	500,817	524,787	502,303
Diluted (in shares)	562,149	510,309	535,433	513,951
Cash dividends declared per share (in usd per share)	$ 0.06	$ 0.06	$ 0.12	$ 0.12

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 04, 2018	Jul. 29, 2017	Aug. 04, 2018	Jul. 29, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 6,759	$ 165,259	$ 135,371	$ 271,880
Other comprehensive income (loss), net of tax:
Net change in unrealized gain (loss) on marketable securities	2,404	556	2,322	(117)
Net change in unrealized gain (loss) on cash flow hedges	0	(765)	0	993
Net change in pension liability	0	1,272	0	0
Other comprehensive income, net of tax	2,404	1,063	2,322	876
Comprehensive income, net of tax	$ 9,163	$ 166,322	$ 137,693	$ 272,756

- Definition

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

+ References + Details

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Aug. 04, 2018	Jul. 29, 2017
Cash flows from operating activities:
Net income	$ 135,371	$ 271,880
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	47,097	41,186
Share-based compensation	83,244	46,439
Amortization and write-off of acquired intangible assets	25,939	2,136
Amortization of inventory fair value adjustment associated with acquisition of Cavium	22,933	0
Amortization of deferred debt issuance costs and debt discounts	7,073	0
Restructuring related impairment charges (gain)	1,993	(446)
Gain from investment in privately-held company	(1,100)	(750)
Amortization of premium/discount on available-for-sale securities	624	803
Other non-cash expense (income), net	4,227	(1,423)
Deferred income taxes	(21,414)	2,791
Gain on sale of property and equipment	(120)	(283)
Gain on sale of discontinued operations	0	(42,187)
Gain on sale of business	0	(5,254)
Changes in assets and liabilities:
Accounts receivable	(48,749)	(36,313)
Inventories	6,866	(14,712)
Prepaid expenses and other assets	(19,504)	7,854
Accounts payable	(271)	3,968
Accrued liabilities and other non-current liabilities	(11,232)	(33,418)
Accrued employee compensation	(41,539)	(8,375)
Deferred income	(729)	1,284
Net cash provided by operating activities	190,709	235,180
Cash flows from investing activities:
Purchases of available-for-sale securities	(14,956)	(376,227)
Sales of available-for-sale securities	623,896	116,700
Maturities of available-for-sale securities	187,985	169,612
Return of investment from privately-held companies	0	2,388
Purchases of time deposits	(25,000)	(150,000)
Maturities of time deposits	150,000	150,000
Purchases of technology licenses	(1,263)	(1,701)
Purchases of property and equipment	(34,389)	(14,544)
Proceeds from sales of property and equipment	223	1,739
Cash payment for acquisition of Cavium, net of cash and cash equivalents acquired	(2,649,465)	0
Net proceeds from sale of discontinued operations	0	72,205
Net proceeds from sale of business	1,250	0
Other	(5,000)	0
Net cash used in investing activities	(1,766,719)	(29,828)
Cash flows from financing activities:
Repurchases of common stock	0	(387,558)
Proceeds from employee stock plans	44,580	97,811
Minimum tax withholding paid on behalf of employees for net share settlement	(36,776)	(24,814)
Dividend payments to shareholders	(69,181)	(60,086)
Payments on technology license obligations	(29,478)	(14,296)
Proceeds from issuance of debt	1,892,605	0
Principal payments of debt	(606,128)	0
Payment of equity and debt financing costs	(9,435)	0
Net cash provided by (used in) financing activities	1,186,187	(388,943)
Net decrease in cash and cash equivalents	(389,823)	(183,591)
Cash and cash equivalents at beginning of period	888,482	814,092
Cash and cash equivalents at end of period	$ 498,659	$ 630,501

Basis of Presentation	6 Months Ended
Basis of Presentation	Aug. 04, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The unaudited condensed consolidated financial statements of Marvell Technology Group Ltd., a Bermuda exempted company, and its wholly owned subsidiaries (the “Company”), as of and for the three and six months ended August 4, 2018, have been prepared as required by the U.S. Securities and Exchange Commission (the “SEC”). Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) have been condensed or omitted as permitted by the SEC. These unaudited condensed consolidated financial statements and related notes should be read in conjunction with the Company's fiscal year 2018 audited financial statements included in the Company's Annual Report on Form 10-K for the fiscal year ended February 3, 2018. In the opinion of management, the financial statements include all adjustments, including normal recurring adjustments and other adjustments, that are considered necessary for fair presentation of the Company’s financial position and results of operations. All inter-company accounts and transactions have been eliminated. Operating results for the periods presented herein are not necessarily indicative of the results that may be expected for the entire year. Certain prior year amounts have been reclassified to conform to current year presentation. These amounts were not material to any of the periods presented. These financial statements should also be read in conjunction with the Company’s critical accounting policies included in the Company’s Annual Report on Form 10-K for the year ended February 3, 2018 and those included in this Form 10-Q below. The Company’s fiscal year is the 52- or 53-week period ending on the Saturday closest to January 31. Accordingly, every fifth or sixth fiscal year will have a 53-week period. The additional week in a 53-week year is added to the fourth quarter, making such quarter consist of 14 weeks. Fiscal 2018 had a 53-week year. Fiscal 2019 is a 52-week year. On July 6, 2018, the Company completed its acquisition of Cavium, Inc. (“Cavium”). Cavium is a provider of highly integrated semiconductor processors that enable intelligent processing for wired and wireless infrastructure and cloud for networking, communications, storage and security applications. Cavium designs, develops and markets semiconductor processors for intelligent and secure networks. The consolidated financial statements include the operating results of Cavium for the period from the date of acquisition to the Company's second quarter ended August 4, 2018. See “Note 3 - Business Combination” for more information.

Recent Accounting Pronouncements	6 Months Ended
Recent Accounting Pronouncements	Aug. 04, 2018
Accounting Changes and Error Corrections [Abstract]
Recent Accounting Pronouncements	Recent Accounting Pronouncements Accounting Pronouncements Recently Adopted In May 2014, the FASB issued a new accounting standard on the recognition of revenue from contracts with customers that superseded nearly all existing revenue recognition guidance under GAAP. The new standard requires an entity to recognize revenue from the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The guidance addresses, in particular, contracts with more than one performance obligation, as well as the accounting for certain costs to obtain or fulfill a contract with a customer, and provides for additional disclosures with respect to revenue and cash flows arising from contracts with customers. Public entities are required to apply the amendments on either a full or modified retrospective basis for annual periods beginning after December 15, 2017 and for interim periods within those annual periods. The Company adopted the standard on a modified retrospective basis in the first quarter of fiscal year 2019, with the cumulative effect recognized in retained earnings at the date of adoption. See "Note 5 - Revenue" for additional information on the impact of the adoption of the new standard on the Company’s consolidated financial statements. In January 2016, the FASB issued an accounting standard update that changes the accounting for equity investments, financial liabilities under the fair value option, and the presentation and disclosure requirements for financial instruments. The Company adopted the standard in the first quarter of fiscal 2019. The adoption of this guidance did not have a significant impact on the Company's consolidated financial statements. In August 2016, the FASB issued an accounting standards update to add or clarify guidance on the classification of certain cash receipts and cash payments in the statement of cash flows. The amendments in the update provide guidance on eight specific cash flow issues. The amendments to the guidance should be applied using a retrospective transition method for each period presented and, if it is impracticable to apply all of the amendments retrospectively for some of the issues, the amendments for those issues would be applied prospectively as of the earliest date practicable. The Company adopted the standard in the first quarter of fiscal 2019. The adoption of this guidance did not have an impact on the Company's consolidated financial statements. In October 2016, the FASB issued new guidance that simplifies the accounting for the income tax effects of intra-entity transfers and will require companies to recognize the income tax effects of intra-entity transfers of assets other than inventory when the transfer occurs. Previous guidance required companies to defer the income tax effects of intra-entity transfers of assets until the asset had been sold to an outside party or otherwise recognized. The Company adopted the standard in the first quarter of fiscal 2019. The adoption of this guidance did not have an impact on the Company's consolidated financial statements. In November 2016, the FASB issued new guidance that requires entities to include in their cash and cash-equivalent balances in the statement of cash flows those amounts that are deemed to be restricted cash and restricted cash equivalents. As a result, companies will no longer present transfers between cash and cash equivalents and restricted cash and restricted cash equivalents in the statement of cash flows. The Company adopted the standard in the first quarter of fiscal 2019. The adoption of this guidance did not have a significant impact on the Company's consolidated financial statements. In January 2017, the FASB issued an accounting standards update that revises the definition of a business. The amendments provide a more robust framework for determining when a set of assets and activities is a business. The update is intended to help companies evaluate whether transactions should be accounted for as acquisitions or disposals of assets or businesses. The Company adopted the standard in the first quarter of fiscal 2019. The adoption of this guidance did not have an impact on the Company's consolidated financial statements. In May 2017, the FASB issued an accounting standards update that provides guidance about which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting. Unless the changes in terms or conditions meet all three criteria outlined in the guidance, modification accounting should be applied. The three criteria relate to changes in the terms and conditions that affect the fair value, vesting conditions, or classification of a share-based payment award. The guidance is required to be applied prospectively to an award modified on or after the adoption date. The Company adopted the standard in the first quarter of fiscal 2019. The adoption of this guidance did not have an impact on the Company's consolidated financial statements. In June 2018, the Financial Accounting Standards Board (“FASB”) issued an accounting standards update that substantially aligns the accounting for shared-based payments to non-employees and employees. The standard is required to be applied through a cumulative-effect adjustment to retained earnings as of the beginning of the fiscal year of adoption. This guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within that fiscal year. Early adoption is permitted. The Company early adopted the standard in the second quarter of fiscal 2019. The adoption of this guidance did not have a significant impact on the Company's consolidated financial statements. Accounting Pronouncements Not Yet Effective In February 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 for lease arrangements. The standard is effective for the Company beginning in the first quarter of fiscal year 2020. 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 threshold for 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 on historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the financial assets. The standard is effective for the Company beginning in the first quarter of fiscal year 2020. The Company does not expect the adoption of this guidance will have a material effect on its consolidated financial statements. In August 2017, the FASB issued an accounting standards update that simplifies the application and administration of hedge accounting. The guidance amends the presentation and disclosure requirements and changes how companies assess effectiveness. The guidance is intended to more closely align hedge accounting with companies' risk management strategies, simplify the application of hedge accounting, and increase transparency as to the scope and results of hedging programs. The guidance is effective for the Company beginning in the first quarter of fiscal year 2021. Early adoption is permitted. The guidance will be applied to cash flow and net investment hedge relationships that exist on the date of adoption using a modified retrospective approach. The presentation and disclosure requirements will be applied prospectively. The Company is evaluating the effect this new guidance will have on its consolidated financial statements. In August 2018, the FASB issued an accounting standard update to align the requirements for capitalizing implementation costs incurred in a software hosting arrangement that is a service contract and costs to develop or obtain internal-use software. The guidance is effective for the Company beginning in the first quarter of fiscal year 2021, with early adoption permitted. The Company is evaluating the effect this new guidance will have on its consolidated financial statements.

Business Combination

6 Months Ended

Aug. 04, 2018

Business Combinations [Abstract]

Business Combination

On July 6, 2018, the Company completed the acquisition of Cavium (the “Cavium acquisition”). Cavium is a provider of highly integrated semiconductor processors that enable intelligent processing for wired and wireless infrastructure and cloud for networking, communications, storage and security applications. The Cavium acquisition was primarily intended to create an opportunity for the combined company to emerge as a leader in infrastructure solutions. In accordance with the terms of the Agreement and Plan of Merger, dated as of November 19, 2017, by and among the Company and Cavium (the “Cavium merger agreement”), the Company acquired all outstanding shares of common stock of Cavium (the “Cavium shares”) for $40.00 per share in cash and 2.1757 shares of the Company’s common stock exchanged for each share of Cavium stock. The Company also made cash payments for the fractional shares that resulted from conversion as specified in the Cavium merger agreement. The merger consideration was funded with a combination of cash on hand, new debt financing and issuance of the Company’s common shares. See “Note 4 - Debt” for discussion of the debt financing.

The following table summarizes the total merger consideration (in thousands, except share and per share data):



Cash consideration to Cavium common stockholders	$	2,819,812
Common stock (153,376,408 shares of the Company's common stock at $21.34 per share)	3,273,053
Cash consideration for intrinsic value of vested director stock options and employee accelerated awards attributable to pre-acquisition service	10,642
Stock consideration for employee accelerated awards attributable to pre-acquisition service	7,804
Fair value of the replacement equity awards attributable to pre-acquisition service	50,485
Total merger consideration	$	6,161,796

Pursuant to the Cavium merger agreement, the Company assumed the outstanding employee equity awards originally granted by Cavium and converted such shares into the Company’s equivalent awards. The outstanding vested options held by directors of Cavium were settled in cash as specified in the Cavium merger agreement. The portion of the fair value of partially vested awards associated with pre-acquisition service of Cavium employees represented a component of the total consideration, as presented above.

The merger consideration allocation set forth herein is preliminary and may be revised as additional information becomes available during the measurement period which could be up to 12 months from the closing date of the acquisition. Any such revisions or changes may be material.

In accordance with US GAAP requirements for business combinations, the Company allocated the fair value of the purchase consideration to the tangible assets, liabilities and intangible assets acquired, including in-process research and development, or IPR&D, generally based on their estimated fair values. The excess purchase price over those fair values is recorded as goodwill. Goodwill of $3.5 billion recorded for the Cavium acquisition is not expected to be deductible for tax purposes. IPR&D is initially capitalized at fair value as an intangible asset with an indefinite life and assessed for impairment thereafter. When an IPR&D project is completed, the IPR&D is reclassified as an amortizable purchased intangible asset and amortized over the asset’s estimated useful life. The Company’s valuation assumptions of acquired assets and assumed liabilities require significant estimates, especially with respect to intangible assets. Acquisition-related costs are expensed in the periods in which the costs are incurred.

The purchase price allocation is as follows (in thousands):



Cash and cash equivalents	$	180,989
Accounts receivable	112,270
Inventories	330,778
Prepaid expense and other current assets	19,890
Assets held for sale	483
Property and equipment	115,428
Acquired intangible assets	2,744,000
Other non-current assets	89,139
Goodwill	3,504,302
Accounts payable	(52,383		)
Accrued liabilities	(127,837		)
Accrued employee compensation	(34,813		)
Deferred income	(2,466		)
Current portion of long-term debt	(6,123		)
Liabilities held for sale	(3,032		)
Long-term debt	(600,005		)
Non-current income taxes payable	(8,365		)
Deferred tax liabilities	(84,360		)
Other non-current liabilities	(16,099		)
Total merger consideration	$	6,161,796

The valuation of identifiable intangible assets and their estimated useful lives are as follows:



	Asset Fair Value		Weighted Average Useful Life (Years)
	(in thousands, except for useful life)
Developed technology	$	1,743,000	7.59
In process research and development ("IPR&D")	513,000		n/a
Customer contracts and related relationships	465,000		8.92
Trade names	23,000		4.32
	$	2,744,000

The intangible assets are amortized on a straight-line basis over the estimated useful lives, except for customer contracts and related relationships, which are amortized using an accelerated method of amortization over the expected customer lives, which more accurately reflects the pattern of realization of economic benefits expected to be obtained. The IPR&D will be accounted for as an indefinite-lived intangible asset and will not be amortized until the underlying projects reach technological feasibility and commercial production or are abandoned at which point the IPR&D will be amortized over the estimated useful life. Useful lives for these IPR&D projects are expected to range between 4 to 9 years.

During the three and six months ended August 4, 2018, the Company incurred $28.2 million and $43.5 million, respectively, in acquisition related costs which were recorded in selling, general and administrative expense in the condensed consolidated statements of operations. The Company also incurred $22.8 million of debt financing costs. As of August 4, 2018, $0.4 million associated with the Revolving Credit Facility was classified in prepaid expenses and other current assets, $1.5 million associated with the Revolving Credit Facility was classified in other non-current assets, and $14.1 million associated with the term loan and senior notes was classified in long-term debt in the condensed consolidated balance sheet. See “Note 4. Debt” for additional information. Additionally, the Company incurred $2.9 million of equity issuance costs, which were recorded in additional paid-in capital in the condensed consolidated balance sheet.

Since the date of the acquisition, Cavium contributed $41.3 million of the consolidated net revenue for the three and six months ended August 4, 2018. Cavium net loss incurred in the period ended August 4, 2018 was $120.6 million, which included restructuring costs of $22.3 million.

Supplemental Pro Forma Information

The supplemental pro forma financial information presented below is for illustrative purposes only and is not necessarily indicative of the financial position or results of operations that would have been realized if the acquisition had been completed on the date indicated, does not reflect synergies that might have been achieved, nor is it indicative of future operating results or financial position. The pro forma adjustments are based upon currently available information and certain assumptions the Company believe are reasonable under the circumstances.

The following supplemental pro forma information presents the combined results of operations for each of the periods presented, as if Cavium had been acquired as of the beginning of fiscal year 2018. The supplemental pro forma information includes adjustments to amortization and depreciation for acquired intangible assets and property and equipment, adjustments to share-based compensation expense, the purchase accounting effect on inventories acquired, interest expense, and transaction costs. For fiscal year 2018, nonrecurring pro forma adjustments directly attributable to the Merger included (i) share-based compensation expense of $37.8 million, (ii) the purchase accounting effect of inventories acquired of $199.7 million, (iii) interest expense of $6.1 million and (iv) transaction costs of $114.6 million. The supplemental pro forma information presented below is for informational purposes only and is not necessarily indicative of our consolidated results of operations of the combined business had the Merger actually occurred at the beginning of fiscal year 2018 or of the results of our future operations of the combined business.

The supplemental pro forma financial information for the periods presented is as follows:



	Six months ended
	August 4, 2018		July 29, 2017
	(in thousands, except per share data)
Pro forma net revenue	$	1,612,873	$	1,649,129
Pro forma net income (loss)	57,453		(204,632		)

Pro forma net income (loss) per share, basic	$	0.09	$	(0.31	)
Pro forma net income (loss) per share, diluted	0.09		(0.31		)

Debt

6 Months Ended

Aug. 04, 2018

Debt Disclosure [Abstract]

Debt

On July 6, 2018, the Company completed its acquisition of Cavium. In connection with the acquisition (see "Note 3 - Business Combination"), the Company executed debt agreements in June 2018 to obtain a $900 million term loan, a $500 million revolving credit facility and $1.0 billion of senior unsecured notes. Upon completion of the offering of the senior unsecured notes in June 2018, the Company terminated an $850 million bridge loan commitment. This bridge loan commitment was provided by the underwriting bankers at the time of the Merger Agreement executed in November 2017. The bridge loan was never drawn upon.

Term Loan and Revolving Credit Facility

On June 13, 2018, the Company entered into a credit agreement (“Credit Agreement”) with certain lenders and Goldman Sachs Bank USA, as the general administrative agent and the term facility agent, and Bank of America, N.A., as the revolving facility agent. The Credit Agreement provides for borrowings of: (i) up to $500.0 million in the form of a revolving line of credit (“Revolving Credit Facility”) and (ii) $900.0 million in the form of a term loan (“Term Loan”). The proceeds of the Term Loan were used to fund a portion of the cash consideration for the Cavium acquisition, repay Cavium’s debt, and pay transaction expenses in connection with the Cavium acquisition. The proceeds of the Revolving Credit Facility is intended for general corporate purposes of the Company and its subsidiaries, which may include, among other things, the financing of acquisitions, the refinancing of other indebtedness and the payment of transaction expenses related to the foregoing. As of August 4, 2018, the Revolving Credit Facility has not been drawn upon. Following is further detail of the terms of the various debt agreements.

The Term Loan has a three year term which matures on June 13, 2021 and has a stated floating interest rate which equates to reserve-adjusted LIBOR + 137.5 bps as of August 4, 2018. The effective interest rate for the Term Loan was 3.912% as of August 4, 2018. As of August 4, 2018, the entire principal balance of $900.0 million Term Loan was outstanding. The Term Loan does not require any scheduled principal payments prior to final maturity. The Revolving Credit Facility has a five year term and has a stated floating interest rate which equates to reserve-adjusted LIBOR + 150.0 bps. As of August 4, 2018, the full amount of the Revolving Credit Facility of $500 million was undrawn and will be available for draw down through June 13, 2023. An unused commitment fee is payable quarterly based on unused balances at a rate that is based on the ratings of the Company's senior unsecured long-term indebtedness. This rate was initially 0.175% per year.

The Credit Agreement requires that the Company and its subsidiaries comply, subject to certain exceptions, with covenants relating to customary matters such as creating or permitting certain liens, entering into sale and leaseback transactions, consolidating, merging, liquidating or dissolving, and entering into restrictive agreements. It also prohibits subsidiaries of the Company from incurring additional indebtedness, and requires the Company to comply with a leverage ratio financial covenant not to exceed 3 to 1 as of the end of any fiscal quarter. As of August 4, 2018, the Company was in compliance with all of its debt covenants.

Senior Unsecured Notes

On June 22, 2018, the Company completed a public offering of (i) $500.0 million aggregate principal amount of the Company's 4.200% Senior Notes due 2023 (the “2023 Notes”) and (ii) $500.0 million aggregate principal amount of the Company's 4.875% Senior Notes due 2028 ("the “2028 Notes” and, together with the 2023 Notes, “the Senior Notes”).

The 2023 Notes mature on June 22, 2023 and the 2028 Notes mature on June 22, 2028. The stated and effective interest rates for the 2023 Notes are 4.200% and 4.423%, respectively. The stated and effective interest rates for the 2028 Notes are 4.875% and 5.012%, respectively. The Company may redeem the Senior Notes, in whole or in part, at any time prior to their maturity at the redemption prices set forth in Senior Notes. In addition, upon the occurrence of a change of control repurchase event (which involves the occurrence of both a change of control and a ratings event involving the Senior Notes being rated below investment grade), the Company will be required to make an offer to repurchase the Senior Notes at a price equal to 101% of the principal amount of the notes, plus accrued and unpaid interest to, but excluding, the repurchase date. The indenture governing the Senior Notes also contains certain limited covenants restricting the Company’s ability to incur certain liens, enter into certain sale and leaseback transactions and merge or consolidate with any other entity or convey, transfer or lease all or substantially all of the Company’s properties or assets to another person, which, in each case, are subject to certain qualifications and exceptions.

Summary of Borrowings and Outstanding Debt

The following table summarizes the Company's outstanding debt at August 4, 2018 (in thousands):



	August 4, 2018
Face Value Outstanding:
Term Loan	$	900,000
2023 Notes	500,000
2028 Notes	500,000
Total borrowings	$	1,900,000
Less: Unamortized debt discount and issuance cost	(21,383		)
Net carrying amount of debt	$	1,878,617
Less: Current portion	$	—
Non-current portion	$	1,878,617

During the three and six months ended August 4, 2018, the Company recognized $9.1 million interest expense in its consolidated statements of operations related to interest, amortization of debt issuance costs and accretion of discount associated with the outstanding Term Loan and Senior Notes, respectively.

As of August 4, 2018, the aggregate future contractual maturities of the Company's outstanding debt, at face value, were as follows (in thousands):



Fiscal year	Amount
2019	$	—
2020	—
2021	—
2022	900,000
2023	—
Thereafter	$	1,000,000

Repayment of Debt and Termination of Credit Facility of Cavium

On July 6, 2018, concurrent with completing the acquisition of Cavium as further described in “Note 3 - Business Combination,” the Company assumed and paid all of Cavium's outstanding debt and accrued interest of $606.6 million. Cavium's debt was governed under a credit agreement dated August 16, 2016, which was terminated following the repayment.

Revenue

6 Months Ended

Aug. 04, 2018

Revenue from Contract with Customer [Abstract]

Revenue

Effect of the Adoption of the New Revenue Standard

At the beginning of fiscal year 2019, the Company adopted the new revenue recognition standard on a modified retrospective basis, with the cumulative effect recognized in retained earnings at the date of adoption. The Company elected to apply the new revenue standard retrospectively to all contracts that are not completed contracts at the date of the initial adoption. Based on the Company’s assessment of this new accounting standard, a change in revenue recognition timing on its component sales made to distributors was made in the first quarter of fiscal year 2019 and the Company started to recognize revenue when the Company transfers control to the distributor rather than deferring recognition until the distributor sells the components. In addition, the Company established accruals for the variable consideration aspect of sales, estimated based on historical experience, which include estimates for price discounts, price protection, rebates, returns and stock rotation programs. On the date of initial adoption, the Company removed the deferred income on component sales made to distributors and recorded estimates of the accruals for variable consideration through a cumulative adjustment to retained earnings. The net impact to the opening balance of retained earnings related to the adoption of the new standard was an increase of $34.2 million.

The following table summarizes the effects of adopting the new revenue standard on the Company's financial statements for the fiscal year beginning February 4, 2018 as an adjustment to the opening balance. Such adjustments were of a non-cash nature.



(In thousands)	Balance as of February 3, 2018		Adjustments			Opening Balance as of February 4, 2018
Consolidated balance sheet:
Assets
Accounts receivable, net	$	280,395	$	1,862		$	282,257
Inventory	170,039		2,016			172,055
Other non-current assets	148,800		42,116			190,916
Liabilities and shareholders' equity:
Accrued liabilities	86,958		70,336			157,294
Deferred income	61,237		(58,560		)	2,677
Retained earnings	$	1,409,452	$	34,218		$	1,443,670

The following tables summarize financial statement line items that are affected in the current reporting period by the application of the new revenue recognition policy as compared with the previous revenue recognition policy which was in effect in prior periods in accordance with ASC 605, Revenue Recognition:



	August 4, 2018
(In thousands)	As currently reported		Adjustments			Balances without adoption of new revenue standard
Consolidated balance sheet:
Assets
Accounts receivable, net	$	443,276	$	—		$	443,276
Inventory	473,429		(1,478		)	471,951
Other non-current assets	275,598		(59,174		)	216,424
Liabilities and shareholders' equity:
Accrued liabilities	277,098		(92,890		)	184,208
Deferred income	3,511		78,492			82,003
Retained earnings	$	1,509,860	$	(46,254	)	$	1,463,606



	Three Months Ended August 4, 2018							Six Months Ended August 4, 2018
(In thousands, except per share amounts)	As currently reported		Adjustments			Balances without adoption of new revenue standard		As currently reported		Adjustments			Balances without adoption of new revenue standard
Consolidated statement of operation:
Net revenue	$	665,310	$	(2,002	)	$	663,308	$	1,269,941	$	(17,531	)	$	1,252,410
Cost of goods sold	288,200		(2,099		)	286,101		517,138		(5,495		)	511,643
Net income (loss)	6,759		97			6,856		135,371		(12,036		)	123,335
Net income (loss) per share - Basic	0.01		—			0.01		0.26		(0.02		)	0.24
Net income (loss) per share - Diluted	$	0.01	$	—		$	0.01	$	0.25	$	(0.02	)	$	0.23

Adoption of the new revenue standard had no impact to cash from or used in operating, financing, or investing activities on the condensed consolidated statements of cash flow.

New Revenue Recognition Policy Including Significant Judgments and Estimates

Through the fiscal year ended February 3, 2018, in accordance with ASC 605, Revenue Recognition, the Company recognized revenue when there was persuasive evidence of an arrangement, delivery had occurred, the fee was fixed or determinable, and collection was reasonably assured. If the Company granted extended payment terms greater than its standard terms for a customer such that collectability was not assured, the revenue was deferred upon shipment and would be recognized when the payment became due provided all other revenue recognition criteria had been satisfied.

Product revenue was generally recognized upon shipment of product to customers, net of accruals for estimated sales returns and rebates. However, some of the Company’s sales were made through distributors under agreements allowing for price protection and limited rights of stock rotation on products unsold by the distributors. Product revenue on sales made through distributors were deferred until the distributors sold the product to end customers. Deferred revenue less the related cost of the inventories was reported as deferred income. The Company did not believe that there was any significant exposure related to impairment of deferred cost of sales, as its historical returns had been minimal and inventory turnover for its distributors generally ranged from 60 to 90 days. The Company’s sales to direct customers were made primarily pursuant to standard purchase orders for delivery of products.

As a result of the adoption of the new revenue standard on February 4, 2018, at the beginning of the first quarter of fiscal year 2019, the Company revised its revenue recognition policy. The Company now recognizes revenue upon transfer of control of promised products or services to customers in an amount that reflects the consideration the Company expects to receive in exchange for those products or services. Under the new revenue recognition standard, the Company applies the following five step approach: (1) identify the contract with a customer, (2) identify the performance obligations in the contract, (3) determine the transaction price, (4) allocate the transaction price to the performance obligations in the contract, and (5) recognize revenue when a performance obligation is satisfied.

The Company enters into contracts that may include various combinations of products and services that are capable of being distinct and accounted for as separate performance obligations. To date, the majority of the revenue has been generated by sales associated with storage and networking products. Revenue from services has been insignificant. Performance obligations associated with product sales transactions are generally satisfied when control passes to customers upon shipment. Accordingly, product revenue is recognized at a point in time when control of the asset is transferred to the customer. The Company recognizes revenue when it satisfies a performance obligation by transferring control of a product to a customer in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. For product revenue, the performance obligation is deemed to be the delivery of the product and therefore, the revenue is generally recognized upon shipment to customers, net of accruals for estimated sales returns and rebates. 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. Some of the Company’s sales are made to distributors under agreements allowing for price protection, price discounts and limited rights of stock rotation on products unsold by the distributors. Control passes to the distributor upon shipment, and terms and payment by the Company’s distributors is not contingent on resale of the product. Product revenue on sales made to distributors with price protection and stock rotation rights is recognized upon shipment to distributors, with an accrual for the variable consideration aspect of sales to distributors, estimated based on historical experience, including estimates for price discounts, price protection, rebates, and stock rotation programs.

The Company’s products are generally subject to warranty, which provides for the estimated future costs of replacement upon shipment of the product. The Company’s products carry a standard one-year warranty, with certain exceptions in which the warranty period can extend to more than one year based on contractual agreements. The warranty accrual is estimated primarily 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 for the periods presented.

Disaggregation of Revenue

The majority of the Company's revenue is generated from sales of the Company’s products.

The following table summarizes net revenue disaggregated by product group (in thousands, except percentages):



	Three Months Ended					Six Months Ended
		August 4, 2018		% of Total		August 4, 2018		% of Total
Net revenue by product group:
Storage (1)		$	335,764	50	%	652,833		51	%
Networking (2)		283,330		43	%	527,558		42	%
Other (3)		46,216		7	%	89,550		7	%
		$	665,310			$	1,269,941


1)	Storage products are comprised primarily of HDD, SSD Controllers, Fibre Channel Adapters and Data Center Storage Solutions.


2)	Networking products are comprised primarily of Ethernet Switches, Ethernet Transceivers, Ethernet NICs, Embedded Communications and Infrastructure Processors, Automotive Ethernet, Security Adapters and Processors as well as Connectivity products. In addition, this grouping includes a few legacy product lines in which the Company no longer invests, but will generate revenue for several years.


3)	Other products are comprised of primarily Printer Solutions, Application Processors and others.

The following table summarizes net revenue disaggregated by primary geographical market (in thousands, except percentages):



	Three Months Ended					Six Months Ended
		August 4, 2018		% of Total		August 4, 2018		% of Total
Net revenue based on destination of shipment:
China		$	292,033	44	%	$	566,542	45	%
Malaysia		96,127		14	%	186,750		15	%
Philippines		55,416		8	%	113,183		9	%
Thailand		39,256		6	%	80,790		6	%
United States		16,563		2	%	32,592		3	%
Other		165,915		26	%	290,084		22	%
		$	665,310			$	1,269,941

The following table summarizes net revenue disaggregated by customer type (in thousands, except percentages):



	Three Months Ended					Six Months Ended
		August 4, 2018		% of Total		August 4, 2018		% of Total
Net revenue by customer type:
Direct customers		$	532,351	80	%	1,002,827		79	%
Distributors		132,959		20	%	267,114		21	%
		$	665,310			$	1,269,941

Contract Liabilities

Contract liabilities consist of the Company’s obligation to transfer goods or services to a customer for which the Company has received consideration or the amount is due from the customer. As of August 4, 2018, contract liability balances are comprised of variable consideration estimated based on a portfolio basis using the expected value methodology based on analysis of historical data, current economic conditions, and contractual terms. Variable consideration estimates consist of the estimated returns, price discounts, price protection, rebates, and stock rotation programs. As of the end of a reporting period, some of the performance obligations associated with contracts will have been unsatisfied or only partially satisfied. In accordance with the practical expedients available in the guidance, the Company does not disclose the value of unsatisfied performance obligations for contracts with an original expected duration of one year or less. Contract liabilities are included in accrued liabilities in the condensed consolidated balance sheets.

The opening balance of contract liabilities at the beginning of the first quarter of fiscal year 2019 was $79.6 million. During the six months ended August 4, 2018, contract liabilities increased by $363.3 million associated with variable consideration estimates for additional shipments in the quarter, offset by $336.7 million decrease in such reserves primarily due to credit memos issued to customers. The ending balance of contract liabilities as of the second quarter ended in fiscal year 2019 was $106.2 million.

Sales Commissions

Sales commissions are generally earned by the salespersons based on shipments to customers. The Company has elected to apply the practical expedient to expense these costs when incurred as the amortization period is typically one year or less. These costs are recorded in selling, general and administrative expenses in the condensed consolidated statements of operations.

Goodwill and Acquired Intangible Assets, Net

6 Months Ended

Aug. 04, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Acquired Intangible Assets, Net

Goodwill

Goodwill represents the excess of the purchase price over the fair value of the net tangible and identifiable intangible assets acquired in a business combination. The carrying value of goodwill as of August 4, 2018 and February 3, 2018 is $5.5 billion and $2.0 billion, respectively. The change in the carrying value of goodwill from February 3, 2018 to August 4, 2018 was due to the Cavium acquisition. See “Note 3 - Business Combination” for further discussion of the acquisition.

Acquired Intangible Assets, Net

There had been no new acquired intangible assets in fiscal year 2018, and as of February 3, 2018, the gross value of acquired intangible assets was fully amortized. In connection with the Cavium acquisition on July 6, 2018, the Company acquired $2.7 billion of intangible assets. As of the second quarter ended August 4, 2018, net carrying amounts are as follows (in thousands, except for weighted average remaining amortization period):



	August 4, 2018
	Gross Carrying Amounts		Accumulated Amortization			Net Carrying Amounts		Weighted average remaining amortization period (years)
Developed technologies	$	1,743,000	$	(18,984	)	$	1,724,016	7.59
Customer contracts and related relationships	465,000		(6,501		)	458,499		8.92
Trade names	23,000		(454		)	22,546		4.32
Total acquired amortizable intangible assets	$	2,231,000	$	(25,939	)	$	2,205,061	7.83
IPR&D	513,000		—			513,000
Total acquired intangible assets	$	2,744,000	$	(25,939	)	$	2,718,061

Amortization expense from acquired intangible assets for the three and six months ended August 4, 2018 was $25.9 million. The following table presents the estimated future amortization expense of acquired amortizable intangible assets as of August 4, 2018 (in thousands):



Fiscal Year	Amount
Remainder of 2019	$	157,380
2020	309,701
2021	301,580
2022	293,024
2023	285,596
Thereafter	857,780
	$	2,205,061

Restructuring and Other Related Charges

6 Months Ended

Aug. 04, 2018

Restructuring and Related Activities [Abstract]

Restructuring and Other Related Charges

The Company continuously evaluates its existing operations to increase operational efficiency, decrease costs and increase profitability. In connection with the Cavium acquisition, the Company recorded restructuring and other related charges of $35.4 million for the three months ended August 4, 2018. These restructuring costs consist of approximately $22.3 million in severance and related costs, $11.0 million in facilities and related costs, and $2.1 million in other exit-related costs. The Company expects to complete these restructuring actions by the end of fiscal 2020.

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



	Severance and related costs			Facilities and related costs			Other exit-related costs			Total
Balance at February 3, 2018	$	654		$	462		$	555		$	1,671
Restructuring charges - continuing operations	24,057			11,057			262			35,376
Net cash payments	(3,617		)	(1,743		)	(541		)	(5,901		)
Release of reserves	(307		)	—			—			(307		)
Exchange rate adjustment	(91		)	—			—			(91		)
Balance at August 4, 2018	$	20,696		$	9,776		$	276		$	30,748
Less: non-current portion	$	—		$	5,878		$	—		$	5,878
Current portion	$	20,696		$	3,898		$	276		$	24,870

The remaining accrued severance and related costs and the other exit-related costs are expected to be paid in fiscal 2019. The remaining accrued facility and related costs includes remaining payments under lease obligations related to vacated space that are expected to be paid through fiscal 2028, net of estimated sub-lease income.

Supplemental Financial Information

6 Months Ended

Aug. 04, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Supplemental Financial Information

Supplemental Financial Information (in thousands)

Consolidated Balance Sheets



	August 4, 2018		February 3, 2018
Inventories:
Work-in-process	$	257,906	$	103,711
Finished goods	215,523		66,328
Total inventories	$	473,429	$	170,039

The inventory balance at August 4, 2018 includes $200.4 million related to the inventory step-up adjustment from the Cavium acquisition.



	August 4, 2018			February 3, 2018
Property and equipment, net:
Machinery and equipment	$	609,376		$	535,416
Land, buildings, and leasehold improvements	279,880			247,675
Computer software	102,943			98,253
Furniture and fixtures	27,235			21,139
	1,019,434			902,483
Less: Accumulated depreciation and amortization	(691,789		)	(700,261		)
Total property and equipment, net	$	327,645		$	202,222

Current accrued liabilities are comprised of the following at August 4, 2018 and February 3, 2018, respectively:



	August 4, 2018		February 3, 2018
Accrued liabilities:
Contract liabilities	$	106,191	$	—
Technology license obligations	76,050		28,488
Accrued royalties	18,003		11,860
Accrued rebates (1)	—		9,292
Accrued legal related expenses	14,664		13,050
Unsettled investment trades (2)	—		4,497
Restructuring liabilities	24,870		1,612
Accrued income tax payable	9,735		959
Other	27,585		17,200
Total accrued liabilities	$	277,098	$	86,958

(1) Accrued rebates are classified as part of contract liabilities beginning in fiscal year 2019 upon adoption of the new revenue recognition standard.

(2) Unsettled investment trades represent amounts owed to third parties for investment purchases for which cash settlement has not yet occurred.

Accumulated Other Comprehensive Income (Loss)

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



	Unrealized Gain (Loss) on Marketable Securities (1)
Balance at February 3, 2018	$	(2,322	)
Other comprehensive loss before reclassifications	(733		)
Amounts reclassified from accumulated other comprehensive gain	3,055
Net current-period other comprehensive gain, net of tax	2,322
Balance at August 4, 2018	$	—



	Unrealized Gain (Loss) on Marketable Securities (1)			Unrealized Gain (Loss) on Cash Flow Hedges (2)			Total
Balance at January 28, 2017	$	(801	)	$	824		$	23
Other comprehensive income (loss) before reclassifications	(146		)	2,341			2,195
Amounts reclassified from accumulated other comprehensive income (loss)	29			(1,348		)	(1,319		)
Net current-period other comprehensive income (loss), net of tax	(117		)	993			876
Balance at July 29, 2017	$	(918	)	$	1,817		$	899

(1) The amounts of gains (losses) associated with the Company's marketable securities reclassified from accumulated other comprehensive income (loss) are recorded in interest and other income, net.

(2) The amounts of gains (losses) associated with the Company's derivative financial instruments reclassified from accumulated other comprehensive income (loss) are recorded in operating expenses. See "Note 10- Derivative Financial Instruments" for additional information on the affected line items in the condensed consolidated statements of operations.

Consolidated Statements of Cash Flows

The noncash consideration paid for the acquisition of Cavium was $3.3 billion for the three and six months ended August 4, 2018.

Investments

6 Months Ended

Aug. 04, 2018

Investments, Debt and Equity Securities [Abstract]

Investments

As of August 4, 2018, the Company has $25.0 million time deposits on hand. As of February 3, 2018, the following table summarizes the Company’s investments (in thousands):



	February 3, 2018
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Short-term investments:
Available-for-sale:
U.S. government and agency debt	$	248,336	$	49	$	(644	)	$	247,741
Foreign government and agency debt	7,004		—		(17		)	6,987
Municipal debt securities	2,734		—		(6		)	2,728
Corporate debt securities	504,609		469		(1,999		)	503,079
Asset backed securities	42,429		3		(177		)	42,255
Held-to-maturity:
Time deposits	150,000		—		—			150,000
Total short-term investments	955,112		521		(2,843		)	952,790
Total investments	$	955,112	$	521	$	(2,843	)	$	952,790

Short-term, highly liquid investments of $78.5 million and $267.6 million as of August 4, 2018 and February 3, 2018, respectively, included in cash and cash equivalents on the accompanying consolidated balance sheets are not included in the table above because the gross unrealized gains and losses were immaterial as the carrying values approximate fair value due to the short term maturity of such investments.

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



	Three Months Ended						Six Months Ended
	August 4, 2018			July 29, 2017			August 4, 2018			July 29, 2017
Gross realized gains	$	369		$	16		$	371		$	85
Gross realized losses	(2,575		)	(69		)	(3,437		)	(113		)
Total net realized gains (losses)	$	(2,206	)	$	(53	)	$	(3,066	)	$	(28	)

The contractual maturities of available-for-sale and held-to-maturity securities are presented in the following tables (in thousands):



	August 4, 2018				February 3, 2018
	Amortized Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value
Due in one year or less	$	25,000	$	25,000	$	554,247	$	553,866
Due between one and five years	—		—		400,866		398,924
Due over five years	—		—		—		—
	$	25,000	$	25,000	$	955,113	$	952,790

There are no securities on hand at August 4, 2018 that have been in a continuous unrealized loss position. Such securities are presented as follows for the fiscal year ended February 3, 2018:



	February 3, 2018
	Less than 12 months					12 months or more					Total
	Fair Value		Unrealized Loss			Fair Value		Unrealized Loss			Fair Value		Unrealized Loss
U.S. government and agency debt	$	148,538	$	(298	)	$	51,332	$	(346	)	$	199,870	$	(644	)
Foreign government and agency debt	3,993		(1		)	2,994		(16		)	6,987		(17		)
Municipal debt securities	1,969		(6		)	—		—			1,969		(6		)
Corporate debt securities	253,380		(1,514		)	46,805		(485		)	300,185		(1,999		)
Asset backed securities	37,636		(145		)	2,167		(32		)	39,803		(177		)
Total securities	$	445,516	$	(1,964	)	$	103,298	$	(879	)	$	548,814	$	(2,843	)

Derivative Financial Instruments

6 Months Ended

Aug. 04, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

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 which mitigates 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. There were no outstanding forward contracts at August 4, 2018 and February 3, 2018.

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.

For the three and six months ended August 4, 2018, the Company did not have any derivative financial instruments. The following table provides information about gains (losses) associated with the Company’s derivative financial instruments for the three and six months ended July 29, 2017 (in thousands):



		Amount of Gains (Losses) in Statements of Operations
		Three Months Ended			Six Months Ended
	Location of Gains (Losses) in Statements of Operations		July 29, 2017			July 29, 2017
Derivatives designated as cash flow hedges:
Forward contracts:	Research and development		$	1,251		$	1,726
	Selling, general and administrative		331			394
			$	1,582		$	2,120

The amounts of gains (losses) associated with the Company's derivative financial instruments reclassified from accumulated other comprehensive loss for the three and six months ended July 29, 2017 are presented in the following table (in thousands):



	Three Months Ended			Six Months Ended
Affected Line Item in the Statements of Operations:		July 29, 2017		July 29, 2017
Operating costs and expenses:
Cash flow hedges:
Research and development		$	1,003	$	1,074
Selling, general and administrative		265		274
Total		$	1,268	$	1,348

The portion of gains (losses) excluded from the assessment of hedge effectiveness is included in interest and other income, net. These amounts were not material in the three and six months ended July 29, 2017. The Company did not have hedge ineffectiveness from derivative financial instruments in the three and six months ended August 4, 2018 and July 29, 2017. No cash flow hedges were terminated as a result of forecasted transactions that did not occur.

Fair Value Measurements

6 Months Ended

Aug. 04, 2018

Fair Value Disclosures [Abstract]

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, foreign government and agency debt, municipal debt securities, corporate debt securities and asset backed 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, the severance pay fund is classified as Level 2 assets as the valuation inputs are based on quoted prices and market observable data of similar instruments.

The tables below set forth, by level, the Company’s assets and liabilities that are measured at fair value on a recurring basis. 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 August 4, 2018
	Level 1		Level 2		Level 3		Total
Items measured at fair value on a recurring basis:
Assets
Cash equivalents:
Money market funds	$	17,759	$	—	$	—	$	17,759
Time deposits	—		60,730		—		60,730
Short-term investments:
Time deposits	—		25,000		—		25,000
Other non-current assets:
Severance pay fund	—		869		—		869
Total assets	$	17,759	$	86,599	$	—	$	104,358



	Fair Value Measurements at February 3, 2018
	Level 1		Level 2		Level 3		Total
Items measured at fair value on a recurring basis:
Assets
Cash equivalents:
Money market funds	$	18,503	$	—	$	—	$	18,503
Time deposits	—		65,117		—		65,117
U.S. government and agency debt	51,589		—		—		51,589
Municipal debt securities	—		5,290		—		5,290
Corporate debt securities	—		127,076		—		127,076
Short-term investments:
Time deposits	—		150,000		—		150,000
U.S. government and agency debt	247,741		—		—		247,741
Foreign government and agency debt	—		6,987		—		6,987
Municipal debt securities	—		2,728		—		2,728
Corporate debt securities	—		503,079		—		503,079
Asset backed securities	—		42,255		—		42,255
Other non-current assets:
Severance pay fund	—		896		—		896
Total assets	$	317,833	$	903,428	$	—	$	1,221,261

Fair Value of Debt

The Company classified the Term Loan, the 2023 Notes and 2028 Notes under Level 2 of the fair value measurement hierarchy. The carrying value of the Term Loan approximates its fair value as the Term Loan is carried at a market observable interest rate that resets periodically. At August 4, 2018, the estimated aggregate fair value of the 2023 Notes and 2028 Notes was $1.0 billion and were classified as Level 2 as there are quoted prices from less active markets for the notes.

- 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

Commitments and Contingencies

6 Months Ended

Aug. 04, 2018

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Lease Commitments

The Company leases some of its facilities, equipment and computer aided design software under non-cancelable operating leases. Further, the Company assumed operating leases following the acquisition of Cavium. The Company also purchases certain intellectual property under technology license obligations and assumed similar liability from the acquisition of Cavium. Technology license obligations include the liabilities under agreements for technology licenses between the Company and various vendors. Future minimum lease payments, net of estimated sublease income, and payments under technology license obligations as of August 4, 2018 are presented in the following table (in thousands):



Fiscal Year	Technology License Obligations			Operating Leases		Total
Remainder of 2019	$	22,934		$	31,994	$	54,928
2020	30,522			40,812		71,334
2021	7,800			28,299		36,099
2022	—			26,005		26,005
2023	—			19,215		19,215
Thereafter	—			28,569		28,569
Total future minimum lease payments	$	61,256		$	174,894	$	236,150
Less: Amount representing interest	(986		)
Present value of future minimum payments	$	60,270
Less: Current portion	(35,352		)
Non-current portion	$	24,918

Purchase Commitments

Under the Company’s manufacturing relationships with its foundry partners, cancellation of outstanding purchase orders is allowed but requires payment of all costs and expenses incurred through the date of cancellation. As of August 4, 2018, these foundries had incurred approximately $160.8 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 or misappropriation of third-party intellectual property rights, including, but not limited to, patents, registered trademarks, copyrights and/or trade secrets. Under the aforementioned indemnification clauses, the Company may be obligated to defend customers and pay for the damages awarded against the customer under an infringement or misappropriation claim, as well as customers' attorneys’ fees and costs. The Company’s indemnification obligations generally do not expire after termination or expiration of the agreement containing the indemnification obligation. However, there are typically 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 and Legal Proceedings

The Company and certain of its subsidiaries are engaged in legal proceedings and claims which arise in the ordinary course of its business. The Company is currently unable to predict the final outcome of these matters and, therefore, cannot determine the likelihood of loss or estimate a range of possible loss, except with respect to amounts where it has determined a loss is both probable and estimable and where it has made an accrual. Litigation is subject to inherent uncertainties and unfavorable rulings could occur. An unfavorable ruling in litigation, particularly patent 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. 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.

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 that 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 the loss is both estimable and probable.

Shareholder's Equity

6 Months Ended

Aug. 04, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Shareholder's Equity

Following the Cavium acquisition and in accordance with the Cavium merger agreement, certain outstanding options to purchase shares of Cavium common stock and certain restricted stock units with respect to Cavium common stock, each granted under Cavium 2016 Equity Incentive Plan (“Cavium 2016 EIP”), Cavium 2007 Equity Incentive Plan (“Cavium 2007 EIP”) and QLogic 2005 Performance Incentive Plan, as assumed by Cavium effective August 16, 2016 (“QLogic 2005 Plan”), (and collectively, with the Cavium 2016 EIP and the Cavium 2007 EIP, the “Cavium Plans”), were assumed by the Company and converted into options to purchase common shares of the Company and restricted stock units with respect to common shares of the Company, respectively. The Company filed a registration statement on July 6, 2018 to register 15,824,555 common shares of the Company, issuable under the Cavium Plans, comprised of 2,535,940 common shares issuable pursuant to outstanding but unexercised options under the Cavium Plans and 13,288,615 common shares issuable pursuant to outstanding unvested restricted stock units under the Cavium Plans.

Cavium 2016 EIP

The Cavium 2016 EIP was adopted by Cavium on June 15, 2016 and was intended as the successor to and continuation of Cavium 2007 EIP. The Cavium 2016 EIP provided for the grant of incentive stock options, non-statutory stock options, stock appreciation rights, restricted stock awards, restricted stock unit awards, performance stock awards, performance cash awards and other stock awards, which may be granted to employees, directors and consultants. Awards under the Cavium 2016 EIP generally vest over four years and expire seven to ten years from the date of grant. Following the effective date, no additional awards were granted under the Cavium 2007 EIP.

Cavium 2007 EIP

Cavium adopted the Cavium 2017 EIP in May 2017 upon completion of its initial public offering. The Cavium 2007 EIP provided for the grant of incentive stock options, non-statutory stock options, restricted stock awards, restricted stock unit awards, stock appreciation rights, performance stock awards, and other forms of equity compensation and performance cash awards, all of which may be granted to employees (including officers), directors, and consultants or affiliates. Awards granted under the Cavium 2007 EIP vest at the rate specified by the plan administrator, for stock options, typically with 1/8th of the shares vesting six months after the date of grant and 1/48th of the shares vesting monthly thereafter over the next three and one half years and for restricted stock unit awards typically with quarterly vesting over four years. Awards expire seven to ten years from the date of grant.

QLogic 2005 Plan

The QLogic 2005 Plan was assumed and registered by Cavium upon its completion of acquisition of QLogic Corporation on August 16, 2016. The QLogic 2005 Plan provided for the issuance of restricted stock unit awards, incentive and non-qualified stock options, and other stock-based incentive awards. Restricted stock unit awards granted pursuant to the QLogic 2005 Plan to employees subject to a service condition generally vest over four years from the date of grant. Stock options granted pursuant to the QLogic 2005 Plan to employees have ten-year terms and generally vest over four years from the date of grant.

Cavium Acquisition-related Equity Awards

The awards under the Cavium Plans assumed by the Company in the Cavium acquisition were measured at the acquisition date based on the estimated fair value of $357.1 million. A portion of that fair value, $68.9 million, which represented the pre-acquisition service provided by employees to Cavium, was included in the total consideration transferred as part of the acquisition. As of the acquisition date, the remaining portion of the fair value of those awards was $288.2 million, representing post-acquisition share-based compensation expense that will be recognized as these employees provide service over the remaining vesting periods. During the three months ended August 4, 2018, the Company recognized $47.1 million of share-based compensation expense in connection with the acquisition of Cavium, of which $37.8 million was due to the accelerated vesting of outstanding equity awards of certain Cavium employees.

Summary of Share-based Compensation Expense

The following table summarizes share-based compensation expense (in thousands):



	Three Months Ended				Six Months Ended
	August 4, 2018		July 29, 2017		August 4, 2018		July 29, 2017
Continuing operations:
Cost of goods sold	$	4,748	$	1,810	$	6,653	$	3,236
Research and development	26,859		12,371		41,144		26,361
Selling, general and administrative	41,816		7,186		49,478		13,509
Share-based compensation - continuing operations	$	73,423	$	21,367	$	97,275	$	43,106
Discontinued operations:
Cost of goods sold	—		—		—		—
Research and development	—		954		—		3,098
Selling, general and administrative	—		101		—		235
Share-based compensation - discontinued operations	—		1,055		—		3,333
Total share-based compensation	$	73,423	$	22,422	$	97,275	$	46,439

Share-based compensation capitalized in inventory was $2.3 million at August 4, 2018 and $1.3 million at February 3, 2018.

Income Tax	6 Months Ended
Income Tax	Aug. 04, 2018
Income Tax Disclosure [Abstract]
Income Tax	Income Tax The Company’s tax provision for interim periods is determined using an estimate of its annual effective tax rate, adjusted for discrete items, if any, that arise during the period. Each quarter, the Company updates its estimate of the annual effective tax rate, and if the estimated annual effective tax rate changes, the Company makes a cumulative adjustment in such period. The Company’s quarterly tax provision, and estimate of its annual effective tax rate, is subject to variation due to several factors, including variability in accurately predicting our pre-tax income or loss and the mix of jurisdictions to which they relate, intercompany transactions, the applicability of special tax regimes, changes in how we do business, and acquisitions, as well as the integration of such acquisitions. The Company’s estimated effective tax rate for the year differs from the U.S. statutory rate of 21% primarily due to the benefit of a substantial portion of its earnings being taxed at rates lower than the U.S. statutory rate. The Company estimates that its effective tax rate could be adversely affected by pre-tax losses incurred in certain non-U.S. jurisdictions subject to tax rates lower than 21% for which it does not realize a tax benefit. These losses reduce the Company's pre-tax income without a corresponding reduction in its tax expense, and therefore increase its effective tax rate. On July 6, 2018, the Company completed the acquisition of Cavium, Inc. (“Cavium”). With this acquisition, the Company is projecting significant amounts of pre-tax losses in the U.S. in the current fiscal year for which an income tax benefit is realized at the U.S. statutory rate of 21%. This income tax benefit is in excess of the Company's projected income taxes from other jurisdictions. As a result, the Company's estimated annual effective tax rate reflects a consolidated income tax benefit. It is possible that significant negative evidence may become available to reach a conclusion that a valuation allowance will be needed, and as such, the Company may recognize a valuation allowance in the next 12 months. The income tax benefit of $30.0 million and $26.2 million, respectively, for the three and six months ended August 4, 2018, included a tax benefit from a net reduction in unrecognized tax benefits of $7.5 million and $7.2 million, respectively, and a tax benefit related to other discrete items recorded in the three and six month period of $2.8 million and $2.4 million, respectively. The Tax Cuts and Jobs Act (“2017 Tax Act”) was signed into law on December 22, 2017. The 2017 Tax Act significantly revises the U.S. corporate income tax by, among other things, lowering the statutory corporate tax rate from 35% to 21%, eliminating certain deductions, imposing a mandatory one-time tax on accumulated earnings of foreign subsidiaries, introducing new tax regimes, and changing how foreign earnings are subject to U.S. tax. The 2017 Tax Act also enhanced and extended through 2026 the option to claim accelerated depreciation deductions on qualified property. The Company has not completed its determination of the accounting implications of the 2017 Tax Act on its tax accruals. However, the Company reasonably estimated the effects of the 2017 Tax Act and recorded provisional amounts in its financial statements as of February 3, 2018. There were no additional adjustments made to these amounts in the three or six month period ended August 4, 2018. As the Company continues its analysis of the 2017 Tax Act, collects and prepares necessary data, and interprets any additional guidance issued by the U.S. Treasury Department, the Internal Revenue Service (“I.R.S.”), and other standard-setting bodies, the Company may make adjustments to the provisional amounts. Those adjustments may materially impact the Company's provision for income taxes in the period in which the adjustments are made. The Company's gross unrecognized tax benefits were $177.5 million and $23.2 million on August 4, 2018 and February 3, 2018, respectively. The net increase to the Company's gross unrecognized tax benefits of $154.3 million is primarily the result of certain unrecognized tax benefits recorded in the Company's accounting for the acquisition of Cavium. If the gross unrecognized tax benefits as of August 4, 2018 were realized in a subsequent period, the Company would record a tax benefit of $148.5 million within its provision of income taxes at such time. The amount of interest and penalties accrued as of August 4, 2018 and February 3, 2018 was $13.9 million and $17.2 million, respectively. 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 $13.5 million from the expiration of statutes of limitations in various jurisdictions during the next 12 months. Government tax authorities from several non-U.S. jurisdictions are also examining the Company’s tax returns. The Company believes that it has adequately provided for any reasonably foreseeable outcomes related to its tax audits and that any settlement will not have a material effect on its results at this time. The Company operates under tax incentives in certain countries that may be extended if certain additional requirements are satisfied. The tax incentives are conditional upon meeting certain employment and investment thresholds. The impact of these tax incentives decreased foreign taxes by $0.5 million and $1.2 million for the three and six months ended August 4, 2018 respectively, and $0.8 million and $1.5 million for the three and six months ended July 29, 2017, respectively. The benefit of these tax incentives on net income per share was less than $0.01 per share for both the three and six months ended August 4, 2018 and July 29, 2017. The Company’s principal source of liquidity as of August 4, 2018 consisted of approximately $520 million of cash, cash equivalents and short-term investments, of which approximately $510 million was held by subsidiaries outside of Bermuda. The Company has not recognized a deferred tax liability on $432 million of the excess financial reporting basis over the tax basis of investments in foreign subsidiaries outside of Bermuda that is indefinitely reinvested. 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 amounts were no longer considered indefinitely reinvested, the Company would incur a tax expense of approximately $113 million.

Net Income Per Share

6 Months Ended

Aug. 04, 2018

Earnings Per Share [Abstract]

Net Income Per Share

The Company reports both basic net income per share, which is based on the weighted average number of common shares outstanding during the period, and diluted net income per share, which is based on the weighted average number of common shares outstanding and potentially dilutive shares outstanding during the period.

In connection with the Cavium acquisition, the Company issued 153.4 million shares of the Company's common stock at $21.34 per share in exchange for Cavium shares on a 2.1757 to 1 basis as a part of the merger consideration. The Company also issued 1.1 million shares of the Company's common stock at $21.34 per share in exchange for Cavium employee accelerated awards on a 2.1757 to 1 basis as a part of the merger consideration. See “Note 3 - Business Combination” for more information. The equity related merger consideration resulted in increasing basic and diluted weighted average shares by 50.9 million weighted average shares for the three months ended August 4, 2018 and by 25.5 million weighted average shares for the six months ended August 4, 2018.

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



	Three Months Ended				Six Months Ended
	August 4, 2018		July 29, 2017		August 4, 2018		July 29, 2017
Numerator:
Income from continuing operations, net of tax	$	6,759	$	135,450	$	135,371	$	235,042
Income from discontinued operations, net of tax	—		29,809		—		36,838
Net income	$	6,759	$	165,259	$	135,371	$	271,880
Denominator:
Weighted average shares — basic	552,238		500,817		524,787		502,303
Effect of dilutive securities:
Share-based awards	9,911		9,492		10,646		11,648
Weighted average shares — diluted	562,149		510,309		535,433		513,951
Income from continuing operations per share:
Basic	$	0.01	$	0.27	$	0.26	$	0.47
Diluted	$	0.01	$	0.26	$	0.25	$	0.46
Income from discontinued operations per share:
Basic	$	—	$	0.06	$	—	$	0.07
Diluted	$	—	$	0.06	$	—	$	0.07
Net income per share:
Basic	$	0.01	$	0.33	$	0.26	$	0.54
Diluted	$	0.01	$	0.32	$	0.25	$	0.53

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):



	Three Months Ended		Six Months Ended
	August 4, 2018	July 29, 2017	August 4, 2018	July 29, 2017
Weighted average shares outstanding:
Share-based awards	5,718	2,770	5,604	7,301

Anti-dilutive potential shares from share-based awards are excluded from the calculation of diluted earnings per share for all 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.

Segment and Geographic Information

6 Months Ended

Aug. 04, 2018

Segment Reporting [Abstract]

Segment and Geographic Information

The Company operates in one reportable segment — the design, development and sale of integrated circuits.

Refer to “Note 5 - Revenue” for net revenue information based on geographic region. The following table presents long-lived asset information based on geographic region. Long-lived assets are based on the physical location of the assets (in thousands)



	August 4, 2018		February 3, 2018
Property and equipment, net:
United States	$	241,586	$	156,053
Others	86,059		46,169
Total property and equipment, net	$	327,645	$	202,222

Basis of Presentation (Policies)	6 Months Ended
Basis of Presentation (Policies)	Aug. 04, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Fiscal Period	The Company’s fiscal year is the 52- or 53-week period ending on the Saturday closest to January 31. Accordingly, every fifth or sixth fiscal year will have a 53-week period. The additional week in a 53-week year is added to the fourth quarter, making such quarter consist of 14 weeks. Fiscal 2018 had a 53-week year. Fiscal 2019 is a 52-week year.
Accounting Pronouncements Recently Adopted and Accounting Pronouncements Not Yet Effective	Accounting Pronouncements Recently Adopted In May 2014, the FASB issued a new accounting standard on the recognition of revenue from contracts with customers that superseded nearly all existing revenue recognition guidance under GAAP. The new standard requires an entity to recognize revenue from the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The guidance addresses, in particular, contracts with more than one performance obligation, as well as the accounting for certain costs to obtain or fulfill a contract with a customer, and provides for additional disclosures with respect to revenue and cash flows arising from contracts with customers. Public entities are required to apply the amendments on either a full or modified retrospective basis for annual periods beginning after December 15, 2017 and for interim periods within those annual periods. The Company adopted the standard on a modified retrospective basis in the first quarter of fiscal year 2019, with the cumulative effect recognized in retained earnings at the date of adoption. See "Note 5 - Revenue" for additional information on the impact of the adoption of the new standard on the Company’s consolidated financial statements. In January 2016, the FASB issued an accounting standard update that changes the accounting for equity investments, financial liabilities under the fair value option, and the presentation and disclosure requirements for financial instruments. The Company adopted the standard in the first quarter of fiscal 2019. The adoption of this guidance did not have a significant impact on the Company's consolidated financial statements. In August 2016, the FASB issued an accounting standards update to add or clarify guidance on the classification of certain cash receipts and cash payments in the statement of cash flows. The amendments in the update provide guidance on eight specific cash flow issues. The amendments to the guidance should be applied using a retrospective transition method for each period presented and, if it is impracticable to apply all of the amendments retrospectively for some of the issues, the amendments for those issues would be applied prospectively as of the earliest date practicable. The Company adopted the standard in the first quarter of fiscal 2019. The adoption of this guidance did not have an impact on the Company's consolidated financial statements. In October 2016, the FASB issued new guidance that simplifies the accounting for the income tax effects of intra-entity transfers and will require companies to recognize the income tax effects of intra-entity transfers of assets other than inventory when the transfer occurs. Previous guidance required companies to defer the income tax effects of intra-entity transfers of assets until the asset had been sold to an outside party or otherwise recognized. The Company adopted the standard in the first quarter of fiscal 2019. The adoption of this guidance did not have an impact on the Company's consolidated financial statements. In November 2016, the FASB issued new guidance that requires entities to include in their cash and cash-equivalent balances in the statement of cash flows those amounts that are deemed to be restricted cash and restricted cash equivalents. As a result, companies will no longer present transfers between cash and cash equivalents and restricted cash and restricted cash equivalents in the statement of cash flows. The Company adopted the standard in the first quarter of fiscal 2019. The adoption of this guidance did not have a significant impact on the Company's consolidated financial statements. In January 2017, the FASB issued an accounting standards update that revises the definition of a business. The amendments provide a more robust framework for determining when a set of assets and activities is a business. The update is intended to help companies evaluate whether transactions should be accounted for as acquisitions or disposals of assets or businesses. The Company adopted the standard in the first quarter of fiscal 2019. The adoption of this guidance did not have an impact on the Company's consolidated financial statements. In May 2017, the FASB issued an accounting standards update that provides guidance about which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting. Unless the changes in terms or conditions meet all three criteria outlined in the guidance, modification accounting should be applied. The three criteria relate to changes in the terms and conditions that affect the fair value, vesting conditions, or classification of a share-based payment award. The guidance is required to be applied prospectively to an award modified on or after the adoption date. The Company adopted the standard in the first quarter of fiscal 2019. The adoption of this guidance did not have an impact on the Company's consolidated financial statements. In June 2018, the Financial Accounting Standards Board (“FASB”) issued an accounting standards update that substantially aligns the accounting for shared-based payments to non-employees and employees. The standard is required to be applied through a cumulative-effect adjustment to retained earnings as of the beginning of the fiscal year of adoption. This guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within that fiscal year. Early adoption is permitted. The Company early adopted the standard in the second quarter of fiscal 2019. The adoption of this guidance did not have a significant impact on the Company's consolidated financial statements. Accounting Pronouncements Not Yet Effective In February 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 for lease arrangements. The standard is effective for the Company beginning in the first quarter of fiscal year 2020. 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 threshold for 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 on historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the financial assets. The standard is effective for the Company beginning in the first quarter of fiscal year 2020. The Company does not expect the adoption of this guidance will have a material effect on its consolidated financial statements. In August 2017, the FASB issued an accounting standards update that simplifies the application and administration of hedge accounting. The guidance amends the presentation and disclosure requirements and changes how companies assess effectiveness. The guidance is intended to more closely align hedge accounting with companies' risk management strategies, simplify the application of hedge accounting, and increase transparency as to the scope and results of hedging programs. The guidance is effective for the Company beginning in the first quarter of fiscal year 2021. Early adoption is permitted. The guidance will be applied to cash flow and net investment hedge relationships that exist on the date of adoption using a modified retrospective approach. The presentation and disclosure requirements will be applied prospectively. The Company is evaluating the effect this new guidance will have on its consolidated financial statements. In August 2018, the FASB issued an accounting standard update to align the requirements for capitalizing implementation costs incurred in a software hosting arrangement that is a service contract and costs to develop or obtain internal-use software. The guidance is effective for the Company beginning in the first quarter of fiscal year 2021, with early adoption permitted. The Company is evaluating the effect this new guidance will have on its consolidated financial statements.

Business Combination (Tables)

6 Months Ended

Aug. 04, 2018

Business Combinations [Abstract]

Summary of Total Merger Consideration

The following table summarizes the total merger consideration (in thousands, except share and per share data):



Cash consideration to Cavium common stockholders	$	2,819,812
Common stock (153,376,408 shares of the Company's common stock at $21.34 per share)	3,273,053
Cash consideration for intrinsic value of vested director stock options and employee accelerated awards attributable to pre-acquisition service	10,642
Stock consideration for employee accelerated awards attributable to pre-acquisition service	7,804
Fair value of the replacement equity awards attributable to pre-acquisition service	50,485
Total merger consideration	$	6,161,796

Purchase Price Allocation

The purchase price allocation is as follows (in thousands):



Cash and cash equivalents	$	180,989
Accounts receivable	112,270
Inventories	330,778
Prepaid expense and other current assets	19,890
Assets held for sale	483
Property and equipment	115,428
Acquired intangible assets	2,744,000
Other non-current assets	89,139
Goodwill	3,504,302
Accounts payable	(52,383		)
Accrued liabilities	(127,837		)
Accrued employee compensation	(34,813		)
Deferred income	(2,466		)
Current portion of long-term debt	(6,123		)
Liabilities held for sale	(3,032		)
Long-term debt	(600,005		)
Non-current income taxes payable	(8,365		)
Deferred tax liabilities	(84,360		)
Other non-current liabilities	(16,099		)
Total merger consideration	$	6,161,796

Schedule of Identifiable Intangible Assets and Estimated Useful Lives

The valuation of identifiable intangible assets and their estimated useful lives are as follows:



	Asset Fair Value		Weighted Average Useful Life (Years)
	(in thousands, except for useful life)
Developed technology	$	1,743,000	7.59
In process research and development ("IPR&D")	513,000		n/a
Customer contracts and related relationships	465,000		8.92
Trade names	23,000		4.32
	$	2,744,000

Supplemental Pro Forma Financial Information

The supplemental pro forma financial information for the periods presented is as follows:



	Six months ended
	August 4, 2018		July 29, 2017
	(in thousands, except per share data)
Pro forma net revenue	$	1,612,873	$	1,649,129
Pro forma net income (loss)	57,453		(204,632		)

Pro forma net income (loss) per share, basic	$	0.09	$	(0.31	)
Pro forma net income (loss) per share, diluted	0.09		(0.31		)

Debt (Tables)

6 Months Ended

Aug. 04, 2018

Debt Disclosure [Abstract]

Summary of Outstanding Debt

The following table summarizes the Company's outstanding debt at August 4, 2018 (in thousands):



	August 4, 2018
Face Value Outstanding:
Term Loan	$	900,000
2023 Notes	500,000
2028 Notes	500,000
Total borrowings	$	1,900,000
Less: Unamortized debt discount and issuance cost	(21,383		)
Net carrying amount of debt	$	1,878,617
Less: Current portion	$	—
Non-current portion	$	1,878,617

Aggregate Future Contractual Maturities of Debt

As of August 4, 2018, the aggregate future contractual maturities of the Company's outstanding debt, at face value, were as follows (in thousands):



Fiscal year	Amount
2019	$	—
2020	—
2021	—
2022	900,000
2023	—
Thereafter	$	1,000,000

Revenue (Tables)

6 Months Ended

Aug. 04, 2018

Revenue from Contract with Customer [Abstract]

Summary of Effect of Adoption of New Revenue Standard



(In thousands)	Balance as of February 3, 2018		Adjustments			Opening Balance as of February 4, 2018
Consolidated balance sheet:
Assets
Accounts receivable, net	$	280,395	$	1,862		$	282,257
Inventory	170,039		2,016			172,055
Other non-current assets	148,800		42,116			190,916
Liabilities and shareholders' equity:
Accrued liabilities	86,958		70,336			157,294
Deferred income	61,237		(58,560		)	2,677
Retained earnings	$	1,409,452	$	34,218		$	1,443,670



	August 4, 2018
(In thousands)	As currently reported		Adjustments			Balances without adoption of new revenue standard
Consolidated balance sheet:
Assets
Accounts receivable, net	$	443,276	$	—		$	443,276
Inventory	473,429		(1,478		)	471,951
Other non-current assets	275,598		(59,174		)	216,424
Liabilities and shareholders' equity:
Accrued liabilities	277,098		(92,890		)	184,208
Deferred income	3,511		78,492			82,003
Retained earnings	$	1,509,860	$	(46,254	)	$	1,463,606



	Three Months Ended August 4, 2018							Six Months Ended August 4, 2018
(In thousands, except per share amounts)	As currently reported		Adjustments			Balances without adoption of new revenue standard		As currently reported		Adjustments			Balances without adoption of new revenue standard
Consolidated statement of operation:
Net revenue	$	665,310	$	(2,002	)	$	663,308	$	1,269,941	$	(17,531	)	$	1,252,410
Cost of goods sold	288,200		(2,099		)	286,101		517,138		(5,495		)	511,643
Net income (loss)	6,759		97			6,856		135,371		(12,036		)	123,335
Net income (loss) per share - Basic	0.01		—			0.01		0.26		(0.02		)	0.24
Net income (loss) per share - Diluted	$	0.01	$	—		$	0.01	$	0.25	$	(0.02	)	$	0.23

Disaggregation of Revenue

The following table summarizes net revenue disaggregated by product group (in thousands, except percentages):



	Three Months Ended					Six Months Ended
		August 4, 2018		% of Total		August 4, 2018		% of Total
Net revenue by product group:
Storage (1)		$	335,764	50	%	652,833		51	%
Networking (2)		283,330		43	%	527,558		42	%
Other (3)		46,216		7	%	89,550		7	%
		$	665,310			$	1,269,941


1)	Storage products are comprised primarily of HDD, SSD Controllers, Fibre Channel Adapters and Data Center Storage Solutions.


2)	Networking products are comprised primarily of Ethernet Switches, Ethernet Transceivers, Ethernet NICs, Embedded Communications and Infrastructure Processors, Automotive Ethernet, Security Adapters and Processors as well as Connectivity products. In addition, this grouping includes a few legacy product lines in which the Company no longer invests, but will generate revenue for several years.


3)	Other products are comprised of primarily Printer Solutions, Application Processors and others.

The following table summarizes net revenue disaggregated by primary geographical market (in thousands, except percentages):



	Three Months Ended					Six Months Ended
		August 4, 2018		% of Total		August 4, 2018		% of Total
Net revenue based on destination of shipment:
China		$	292,033	44	%	$	566,542	45	%
Malaysia		96,127		14	%	186,750		15	%
Philippines		55,416		8	%	113,183		9	%
Thailand		39,256		6	%	80,790		6	%
United States		16,563		2	%	32,592		3	%
Other		165,915		26	%	290,084		22	%
		$	665,310			$	1,269,941

The following table summarizes net revenue disaggregated by customer type (in thousands, except percentages):



	Three Months Ended					Six Months Ended
		August 4, 2018		% of Total		August 4, 2018		% of Total
Net revenue by customer type:
Direct customers		$	532,351	80	%	1,002,827		79	%
Distributors		132,959		20	%	267,114		21	%
		$	665,310			$	1,269,941

Goodwill and Acquired Intangible Assets, Net (Tables)

6 Months Ended

Aug. 04, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Finite-Lived Intangible Assets by Major Class

As of the second quarter ended August 4, 2018, net carrying amounts are as follows (in thousands, except for weighted average remaining amortization period):



	August 4, 2018
	Gross Carrying Amounts		Accumulated Amortization			Net Carrying Amounts		Weighted average remaining amortization period (years)
Developed technologies	$	1,743,000	$	(18,984	)	$	1,724,016	7.59
Customer contracts and related relationships	465,000		(6,501		)	458,499		8.92
Trade names	23,000		(454		)	22,546		4.32
Total acquired amortizable intangible assets	$	2,231,000	$	(25,939	)	$	2,205,061	7.83
IPR&D	513,000		—			513,000
Total acquired intangible assets	$	2,744,000	$	(25,939	)	$	2,718,061

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

The following table presents the estimated future amortization expense of acquired amortizable intangible assets as of August 4, 2018 (in thousands):



Fiscal Year	Amount
Remainder of 2019	$	157,380
2020	309,701
2021	301,580
2022	293,024
2023	285,596
Thereafter	857,780
	$	2,205,061

Restructuring and Other Related Charges (Tables)

6 Months Ended

Aug. 04, 2018

Restructuring and Related Activities [Abstract]

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 cost associated with the restructuring charges (in thousands):



	Severance and related costs			Facilities and related costs			Other exit-related costs			Total
Balance at February 3, 2018	$	654		$	462		$	555		$	1,671
Restructuring charges - continuing operations	24,057			11,057			262			35,376
Net cash payments	(3,617		)	(1,743		)	(541		)	(5,901		)
Release of reserves	(307		)	—			—			(307		)
Exchange rate adjustment	(91		)	—			—			(91		)
Balance at August 4, 2018	$	20,696		$	9,776		$	276		$	30,748
Less: non-current portion	$	—		$	5,878		$	—		$	5,878
Current portion	$	20,696		$	3,898		$	276		$	24,870

Supplemental Financial Information (Tables)

6 Months Ended

Aug. 04, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Inventories



	August 4, 2018		February 3, 2018
Inventories:
Work-in-process	$	257,906	$	103,711
Finished goods	215,523		66,328
Total inventories	$	473,429	$	170,039

Schedule of Property and Equipment, Net



	August 4, 2018			February 3, 2018
Property and equipment, net:
Machinery and equipment	$	609,376		$	535,416
Land, buildings, and leasehold improvements	279,880			247,675
Computer software	102,943			98,253
Furniture and fixtures	27,235			21,139
	1,019,434			902,483
Less: Accumulated depreciation and amortization	(691,789		)	(700,261		)
Total property and equipment, net	$	327,645		$	202,222

Schedule of Current Accrued Liabilities

Current accrued liabilities are comprised of the following at August 4, 2018 and February 3, 2018, respectively:



	August 4, 2018		February 3, 2018
Accrued liabilities:
Contract liabilities	$	106,191	$	—
Technology license obligations	76,050		28,488
Accrued royalties	18,003		11,860
Accrued rebates (1)	—		9,292
Accrued legal related expenses	14,664		13,050
Unsettled investment trades (2)	—		4,497
Restructuring liabilities	24,870		1,612
Accrued income tax payable	9,735		959
Other	27,585		17,200
Total accrued liabilities	$	277,098	$	86,958

(1) Accrued rebates are classified as part of contract liabilities beginning in fiscal year 2019 upon adoption of the new revenue recognition standard.

(2) Unsettled investment trades represent amounts owed to third parties for investment purchases for which cash settlement has not yet occurred.

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:



	Unrealized Gain (Loss) on Marketable Securities (1)
Balance at February 3, 2018	$	(2,322	)
Other comprehensive loss before reclassifications	(733		)
Amounts reclassified from accumulated other comprehensive gain	3,055
Net current-period other comprehensive gain, net of tax	2,322
Balance at August 4, 2018	$	—



	Unrealized Gain (Loss) on Marketable Securities (1)			Unrealized Gain (Loss) on Cash Flow Hedges (2)			Total
Balance at January 28, 2017	$	(801	)	$	824		$	23
Other comprehensive income (loss) before reclassifications	(146		)	2,341			2,195
Amounts reclassified from accumulated other comprehensive income (loss)	29			(1,348		)	(1,319		)
Net current-period other comprehensive income (loss), net of tax	(117		)	993			876
Balance at July 29, 2017	$	(918	)	$	1,817		$	899

(1) The amounts of gains (losses) associated with the Company's marketable securities reclassified from accumulated other comprehensive income (loss) are recorded in interest and other income, net.

Investments (Tables)

6 Months Ended

Aug. 04, 2018

Investments, Debt and Equity Securities [Abstract]

Summary of Investments

As of February 3, 2018, the following table summarizes the Company’s investments (in thousands):



	February 3, 2018
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Short-term investments:
Available-for-sale:
U.S. government and agency debt	$	248,336	$	49	$	(644	)	$	247,741
Foreign government and agency debt	7,004		—		(17		)	6,987
Municipal debt securities	2,734		—		(6		)	2,728
Corporate debt securities	504,609		469		(1,999		)	503,079
Asset backed securities	42,429		3		(177		)	42,255
Held-to-maturity:
Time deposits	150,000		—		—			150,000
Total short-term investments	955,112		521		(2,843		)	952,790
Total investments	$	955,112	$	521	$	(2,843	)	$	952,790

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 tables (in thousands):



	Three Months Ended						Six Months Ended
	August 4, 2018			July 29, 2017			August 4, 2018			July 29, 2017
Gross realized gains	$	369		$	16		$	371		$	85
Gross realized losses	(2,575		)	(69		)	(3,437		)	(113		)
Total net realized gains (losses)	$	(2,206	)	$	(53	)	$	(3,066	)	$	(28	)

Available-for-sale Securities Classified by Contractual Maturities

The contractual maturities of available-for-sale and held-to-maturity securities are presented in the following tables (in thousands):



	August 4, 2018				February 3, 2018
	Amortized Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value
Due in one year or less	$	25,000	$	25,000	$	554,247	$	553,866
Due between one and five years	—		—		400,866		398,924
Due over five years	—		—		—		—
	$	25,000	$	25,000	$	955,113	$	952,790

Unrealized Loss Position Investments

Such securities are presented as follows for the fiscal year ended February 3, 2018:



	February 3, 2018
	Less than 12 months					12 months or more					Total
	Fair Value		Unrealized Loss			Fair Value		Unrealized Loss			Fair Value		Unrealized Loss
U.S. government and agency debt	$	148,538	$	(298	)	$	51,332	$	(346	)	$	199,870	$	(644	)
Foreign government and agency debt	3,993		(1		)	2,994		(16		)	6,987		(17		)
Municipal debt securities	1,969		(6		)	—		—			1,969		(6		)
Corporate debt securities	253,380		(1,514		)	46,805		(485		)	300,185		(1,999		)
Asset backed securities	37,636		(145		)	2,167		(32		)	39,803		(177		)
Total securities	$	445,516	$	(1,964	)	$	103,298	$	(879	)	$	548,814	$	(2,843	)

Derivative Financial Instruments (Tables)

6 Months Ended

Aug. 04, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Information about Gains (Losses) Associated with Derivative Financial Instruments

The following table provides information about gains (losses) associated with the Company’s derivative financial instruments for the three and six months ended July 29, 2017 (in thousands):



		Amount of Gains (Losses) in Statements of Operations
		Three Months Ended			Six Months Ended
	Location of Gains (Losses) in Statements of Operations		July 29, 2017			July 29, 2017
Derivatives designated as cash flow hedges:
Forward contracts:	Research and development		$	1,251		$	1,726
	Selling, general and administrative		331			394
			$	1,582		$	2,120

Gains (Losses) Reclassified from Accumulated Other Comprehensive Income (Loss)



	Three Months Ended			Six Months Ended
Affected Line Item in the Statements of Operations:		July 29, 2017		July 29, 2017
Operating costs and expenses:
Cash flow hedges:
Research and development		$	1,003	$	1,074
Selling, general and administrative		265		274
Total		$	1,268	$	1,348

Fair Value Measurements (Tables)

6 Months Ended

Aug. 04, 2018

Fair Value Disclosures [Abstract]

Fair Value, Assets and Liabilities Measured on Recurring Basis



	Fair Value Measurements at August 4, 2018
	Level 1		Level 2		Level 3		Total
Items measured at fair value on a recurring basis:
Assets
Cash equivalents:
Money market funds	$	17,759	$	—	$	—	$	17,759
Time deposits	—		60,730		—		60,730
Short-term investments:
Time deposits	—		25,000		—		25,000
Other non-current assets:
Severance pay fund	—		869		—		869
Total assets	$	17,759	$	86,599	$	—	$	104,358



	Fair Value Measurements at February 3, 2018
	Level 1		Level 2		Level 3		Total
Items measured at fair value on a recurring basis:
Assets
Cash equivalents:
Money market funds	$	18,503	$	—	$	—	$	18,503
Time deposits	—		65,117		—		65,117
U.S. government and agency debt	51,589		—		—		51,589
Municipal debt securities	—		5,290		—		5,290
Corporate debt securities	—		127,076		—		127,076
Short-term investments:
Time deposits	—		150,000		—		150,000
U.S. government and agency debt	247,741		—		—		247,741
Foreign government and agency debt	—		6,987		—		6,987
Municipal debt securities	—		2,728		—		2,728
Corporate debt securities	—		503,079		—		503,079
Asset backed securities	—		42,255		—		42,255
Other non-current assets:
Severance pay fund	—		896		—		896
Total assets	$	317,833	$	903,428	$	—	$	1,221,261

Commitments and Contingencies (Tables)

6 Months Ended

Aug. 04, 2018

Commitments and Contingencies Disclosure [Abstract]

Future Minimum Lease Payments, Net of Estimated Sublease Income Under Operating Leases

Future minimum lease payments, net of estimated sublease income, and payments under technology license obligations as of August 4, 2018 are presented in the following table (in thousands):



Fiscal Year	Technology License Obligations			Operating Leases		Total
Remainder of 2019	$	22,934		$	31,994	$	54,928
2020	30,522			40,812		71,334
2021	7,800			28,299		36,099
2022	—			26,005		26,005
2023	—			19,215		19,215
Thereafter	—			28,569		28,569
Total future minimum lease payments	$	61,256		$	174,894	$	236,150
Less: Amount representing interest	(986		)
Present value of future minimum payments	$	60,270
Less: Current portion	(35,352		)
Non-current portion	$	24,918

Future Minimum Payments Under Technology License Obligations

Future minimum lease payments, net of estimated sublease income, and payments under technology license obligations as of August 4, 2018 are presented in the following table (in thousands):



Fiscal Year	Technology License Obligations			Operating Leases		Total
Remainder of 2019	$	22,934		$	31,994	$	54,928
2020	30,522			40,812		71,334
2021	7,800			28,299		36,099
2022	—			26,005		26,005
2023	—			19,215		19,215
Thereafter	—			28,569		28,569
Total future minimum lease payments	$	61,256		$	174,894	$	236,150
Less: Amount representing interest	(986		)
Present value of future minimum payments	$	60,270
Less: Current portion	(35,352		)
Non-current portion	$	24,918

Shareholder's Equity (Tables)

6 Months Ended

Aug. 04, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Summary of Share-based Compensation Expense

The following table summarizes share-based compensation expense (in thousands):



	Three Months Ended				Six Months Ended
	August 4, 2018		July 29, 2017		August 4, 2018		July 29, 2017
Continuing operations:
Cost of goods sold	$	4,748	$	1,810	$	6,653	$	3,236
Research and development	26,859		12,371		41,144		26,361
Selling, general and administrative	41,816		7,186		49,478		13,509
Share-based compensation - continuing operations	$	73,423	$	21,367	$	97,275	$	43,106
Discontinued operations:
Cost of goods sold	—		—		—		—
Research and development	—		954		—		3,098
Selling, general and administrative	—		101		—		235
Share-based compensation - discontinued operations	—		1,055		—		3,333
Total share-based compensation	$	73,423	$	22,422	$	97,275	$	46,439

Net Income Per Share (Tables)

6 Months Ended

Aug. 04, 2018

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

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



	Three Months Ended				Six Months Ended
	August 4, 2018		July 29, 2017		August 4, 2018		July 29, 2017
Numerator:
Income from continuing operations, net of tax	$	6,759	$	135,450	$	135,371	$	235,042
Income from discontinued operations, net of tax	—		29,809		—		36,838
Net income	$	6,759	$	165,259	$	135,371	$	271,880
Denominator:
Weighted average shares — basic	552,238		500,817		524,787		502,303
Effect of dilutive securities:
Share-based awards	9,911		9,492		10,646		11,648
Weighted average shares — diluted	562,149		510,309		535,433		513,951
Income from continuing operations per share:
Basic	$	0.01	$	0.27	$	0.26	$	0.47
Diluted	$	0.01	$	0.26	$	0.25	$	0.46
Income from discontinued operations per share:
Basic	$	—	$	0.06	$	—	$	0.07
Diluted	$	—	$	0.06	$	—	$	0.07
Net income per share:
Basic	$	0.01	$	0.33	$	0.26	$	0.54
Diluted	$	0.01	$	0.32	$	0.25	$	0.53

Schedule of Anti-dilutive Potential Shares

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



	Three Months Ended		Six Months Ended
	August 4, 2018	July 29, 2017	August 4, 2018	July 29, 2017
Weighted average shares outstanding:
Share-based awards	5,718	2,770	5,604	7,301

Segment and Geographic Information (Tables)

6 Months Ended

Aug. 04, 2018

Segment Reporting [Abstract]

Long-lived Assets by Physical Location

Long-lived assets are based on the physical location of the assets (in thousands)



	August 4, 2018		February 3, 2018
Property and equipment, net:
United States	$	241,586	$	156,053
Others	86,059		46,169
Total property and equipment, net	$	327,645	$	202,222

Business Combination - Additional Information (Details) $ / shares in Units, $ in Thousands		3 Months Ended	6 Months Ended
	Jul. 06, 2018 USD ($) $ / shares	Aug. 04, 2018 USD ($)	Aug. 04, 2018 USD ($)	Feb. 03, 2018 USD ($)
Business Acquisition [Line Items]
Goodwill		$ 5,497,608	$ 5,497,608	$ 1,993,310
Weighted average remaining amortization period (years)			7 years 9 months 29 days
Cavium
Business Acquisition [Line Items]
Cash consideration (in usd per share) \| $ / shares	$ 40.00
Number of common shares per Cavium share	2.1757
Goodwill	$ 3,504,302
Acquisition related costs			$ 114,600
Debt financing costs		22,800	22,800
Equity issuance costs			2,900
Consolidated net revenue contributed by Cavium		41,300	41,300
Net loss incurred in the period			120,600
Restructuring costs			22,300
Cavium \| Prepaid Expenses and Other Current Assets
Business Acquisition [Line Items]
Debt financing costs		400	400
Cavium \| Other Non-current Assets
Business Acquisition [Line Items]
Debt financing costs		1,500	1,500
Cavium \| Long-term Debt
Business Acquisition [Line Items]
Debt financing costs		14,100	14,100
Cavium \| Selling, general and administrative
Business Acquisition [Line Items]
Acquisition related costs		$ 28,200	$ 43,500
IPR&D \| Minimum
Business Acquisition [Line Items]
Weighted average remaining amortization period (years)	4 years
IPR&D \| Maximum
Business Acquisition [Line Items]
Weighted average remaining amortization period (years)	9 years

Business Combination - Summary of Merger Consideration (Details) - Cavium $ / shares in Units, $ in Thousands	Jul. 06, 2018 USD ($) $ / shares shares
Business Acquisition [Line Items]
Cash consideration to Cavium common stockholders	$ 2,819,812
Common stock (153,376,408 shares of the Company's common stock at $21.34 per share)	3,273,053
Cash consideration for intrinsic value of vested director stock options and employee accelerated awards attributable to pre-acquisition service	10,642
Stock consideration for employee accelerated awards attributable to pre-acquisition service	7,804
Fair value of the replacement equity awards attributable to pre-acquisition service	50,485
Total merger consideration	$ 6,161,796
Number of shares issued in acquisition \| shares	153,376,408
Acquisition share price (in usd per share) \| $ / shares	$ 21.34

Business Combination - Purchase Price Allocation (Details) - USD ($) $ in Thousands	Aug. 04, 2018	Jul. 06, 2018	Feb. 03, 2018
Business Acquisition [Line Items]
Goodwill	$ 5,497,608		$ 1,993,310
Cavium
Business Acquisition [Line Items]
Cash and cash equivalents		$ 180,989
Accounts receivable		112,270
Inventories		330,778
Prepaid expense and other current assets		19,890
Assets held for sale		483
Property and equipment		115,428
Acquired intangible assets		2,744,000
Other non-current assets		89,139
Goodwill		3,504,302
Accounts payable		(52,383)
Accrued liabilities		(127,837)
Accrued employee compensation		(34,813)
Deferred income		(2,466)
Current portion of long-term debt		(6,123)
Liabilities held for sale		(3,032)
Long-term debt		(600,005)
Non-current income taxes payable		(8,365)
Deferred tax liabilities		(84,360)
Other non-current liabilities		(16,099)
Total merger consideration		$ 6,161,796

Business Combination - Identifiable Intangible Assets (Details) - USD ($) $ in Thousands	6 Months Ended
	Aug. 04, 2018	Jul. 06, 2018
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Life (Years)	7 years 9 months 29 days
Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Life (Years)	7 years 7 months 2 days
Customer contracts and related relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Life (Years)	8 years 11 months 1 day
Trade names
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Life (Years)	4 years 3 months 26 days
Cavium
Acquired Indefinite-lived Intangible Assets [Line Items]
Asset Fair Value		$ 2,744,000
Cavium \| In process research and development (IPR&D)
Acquired Indefinite-lived Intangible Assets [Line Items]
Asset Fair Value, Indefinite-lived intangibles		513,000
Cavium \| Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Asset Fair Value, Finite-lived intangibles		1,743,000
Weighted Average Useful Life (Years)	7 years 7 months 2 days
Cavium \| Customer contracts and related relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Asset Fair Value, Finite-lived intangibles		465,000
Weighted Average Useful Life (Years)	8 years 11 months 1 day
Cavium \| Trade names
Acquired Finite-Lived Intangible Assets [Line Items]
Asset Fair Value, Finite-lived intangibles		$ 23,000
Weighted Average Useful Life (Years)	4 years 3 months 26 days

Business Combination - Supplemental Pro Forma Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 04, 2018	Jul. 29, 2017	Aug. 04, 2018	Jul. 29, 2017
Business Acquisition [Line Items]
Share-based compensation expense	$ 73,423	$ 22,422	$ 97,275	$ 46,439
Interest expense	15,795	$ 80	16,039	131
Cavium
Business Acquisition [Line Items]
Share-based compensation expense	$ 47,100		37,800
Adjustment to inventories			199,700
Interest expense			6,100
Acquisition related costs			114,600
Pro forma net revenue			1,612,873	1,649,129
Pro forma net income (loss)			$ 57,453	$ (204,632)
Pro forma net income (loss) per share, basic (in usd per share)			$ 0.09	$ (0.31)
Pro forma net income (loss) per share, diluted (in usd per share)			$ 0.09	$ (0.31)

Debt - Additional Information (Details) - USD ($)	3 Months Ended	6 Months Ended
Debt - Additional Information (Details) - USD ($)	Aug. 04, 2018	Aug. 04, 2018	Jun. 22, 2018	Jun. 13, 2018
Debt Instrument [Line Items]
Interest expense	$ 9,100,000	$ 9,100,000
Term Loan
Debt Instrument [Line Items]
Borrowing capacity				$ 900,000,000
Line of Credit \| Revolving Credit Facility
Debt Instrument [Line Items]
Borrowing capacity				$ 500,000,000
Senior Notes
Debt Instrument [Line Items]
Aggregate principal amount			$ 1,000,000,000

Debt - Term Loan and Revolving Credit Facility (Details)		3 Months Ended
	Jun. 13, 2018 USD ($)	Aug. 04, 2018 USD ($)
Line of Credit Facility [Line Items]
Long-term debt		$ 1,900,000,000
Unused commitment fee percentage	0.175%
Leverage ratio	3
Line of Credit \| Revolving Credit Facility
Line of Credit Facility [Line Items]
Borrowing capacity	$ 500,000,000
Debt term	5 years
Amount available for draw		$ 500,000,000
Line of Credit \| Revolving Credit Facility \| LIBOR
Line of Credit Facility [Line Items]
Basis spread on variable rate (as a percent)		1.50%
Term Loan
Line of Credit Facility [Line Items]
Borrowing capacity	$ 900,000,000
Debt term	3 years
Effective interest rate		3.912%
Long-term debt		$ 900,000,000
Term Loan \| LIBOR
Line of Credit Facility [Line Items]
Basis spread on variable rate (as a percent)		1.375%

Debt - Senior Unsecured Notes (Details) - Senior Notes	Jun. 22, 2018 USD ($)
Debt Instrument [Line Items]
Aggregate principal amount	$ 1,000,000,000
Redemption price percentage	101.00%
2023 Notes
Debt Instrument [Line Items]
Aggregate principal amount	$ 500,000,000
Stated interest rate	4.20%
Effective interest rate	4.423%
2028 Notes
Debt Instrument [Line Items]
Aggregate principal amount	$ 500,000,000
Stated interest rate	4.875%
Effective interest rate	5.012%

Debt - Summary of Outstanding Debt (Details) - USD ($) $ in Thousands	Aug. 04, 2018	Feb. 03, 2018
Debt Instrument [Line Items]
Total borrowings	$ 1,900,000
Less: Unamortized debt discount and issuance cost	(21,383)
Net carrying amount of debt	1,878,617
Less: Current portion	0
Non-current portion	1,878,617	$ 0
Term Loan
Debt Instrument [Line Items]
Total borrowings	900,000
Notes \| 2023 Notes
Debt Instrument [Line Items]
Total borrowings	500,000
Notes \| 2028 Notes
Debt Instrument [Line Items]
Total borrowings	$ 500,000

Debt - Future Maturities (Details) $ in Thousands	Aug. 04, 2018 USD ($)
Fiscal year
2019	$ 0
2020	0
2021	0
2022	900,000
2023	0
Thereafter	$ 1,000,000

Debt - Repayment of Debt and Termination of Credit Facility of Cavium (Details) $ in Millions	6 Months Ended
	Aug. 04, 2018 USD ($)
Cavium
Debt Instrument [Line Items]
Payment of debt and interest	$ 606.6

Revenue - Effect of the Adoption of the New Revenue Standard, Additional Information (Details) - USD ($) $ in Thousands	Aug. 04, 2018	Feb. 03, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Retained earnings	$ 1,509,860	$ 1,409,452
Accounting Standards Update 2014-09 \| Difference between Revenue Guidance in Effect before and after Topic 606
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Retained earnings	$ (46,254)	$ 34,218

Revenue - Summary of Impact of Adoption of New Revenue Standard (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 04, 2018	Jul. 29, 2017	Aug. 04, 2018	Jul. 29, 2017	Feb. 03, 2018
Assets
Accounts receivable, net	$ 443,276		$ 443,276		$ 280,395
Inventory	473,429		473,429		170,039
Other non-current assets	275,598		275,598		148,800
Liabilities and shareholders' equity:
Accrued liabilities	277,098		277,098		86,958
Deferred income	3,511		3,511		61,237
Retained earnings	1,509,860		1,509,860		1,409,452
Consolidated statement of operation:
Net revenue	665,310	$ 604,750	1,269,941	$ 1,177,459
Cost of goods sold	288,200	239,572	517,138	466,770
Net income (loss)	$ 6,759	$ 165,259	$ 135,371	$ 271,880
Net income (loss) per share - Basic (in usd per share)	$ 0.01	$ 0.33	$ 0.26	$ 0.54
Net income (loss) per share - Diluted (in usd per share)	$ 0.01	$ 0.32	$ 0.25	$ 0.53
Adjustments \| Accounting Standards Update 2014-09
Assets
Accounts receivable, net	$ 0		$ 0		1,862
Inventory	(1,478)		(1,478)		2,016
Other non-current assets	(59,174)		(59,174)		42,116
Liabilities and shareholders' equity:
Accrued liabilities	(92,890)		(92,890)		70,336
Deferred income	78,492		78,492		(58,560)
Retained earnings	(46,254)		(46,254)		34,218
Consolidated statement of operation:
Net revenue	(2,002)		(17,531)
Cost of goods sold	(2,099)		(5,495)
Net income (loss)	$ 97		$ (12,036)
Net income (loss) per share - Basic (in usd per share)	$ 0.00		$ (0.02)
Net income (loss) per share - Diluted (in usd per share)	$ 0.00		$ (0.02)
Balances without adoption of new revenue standard
Assets
Accounts receivable, net	$ 443,276		$ 443,276		282,257
Inventory	471,951		471,951		172,055
Other non-current assets	216,424		216,424		190,916
Liabilities and shareholders' equity:
Accrued liabilities	184,208		184,208		157,294
Deferred income	82,003		82,003		2,677
Retained earnings	1,463,606		1,463,606		$ 1,443,670
Consolidated statement of operation:
Net revenue	663,308		1,252,410
Cost of goods sold	286,101		511,643
Net income (loss)	$ 6,856		$ 123,335
Net income (loss) per share - Basic (in usd per share)	$ 0.01		$ 0.24
Net income (loss) per share - Diluted (in usd per share)	$ 0.01		$ 0.23

Revenue - New Revenue Recognition Policy Including Significant Judgments and Estimates (Details)	6 Months Ended
	Aug. 04, 2018
Minimum
Inventory [Line Items]
Inventory turnover period	60 days
Maximum
Inventory [Line Items]
Inventory turnover period	90 days

Revenue - Net Revenue by Product Group (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Aug. 04, 2018	Aug. 04, 2018
Disaggregation of Revenue [Line Items]
Net revenue	$ 665,310	$ 1,269,941
Storage
Disaggregation of Revenue [Line Items]
Net revenue	$ 335,764	$ 652,833
Storage \| Net revenue
Disaggregation of Revenue [Line Items]
% of Total	50.00%	51.00%
Networking
Disaggregation of Revenue [Line Items]
Net revenue	$ 283,330	$ 527,558
Networking \| Net revenue
Disaggregation of Revenue [Line Items]
% of Total	43.00%	42.00%
Other
Disaggregation of Revenue [Line Items]
Net revenue	$ 46,216	$ 89,550
Other \| Net revenue
Disaggregation of Revenue [Line Items]
% of Total	7.00%	7.00%

Revenue - Net Revenue Based on Destination of Shipment (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Aug. 04, 2018	Aug. 04, 2018
Disaggregation of Revenue [Line Items]
Net revenue	$ 665,310	$ 1,269,941
China
Disaggregation of Revenue [Line Items]
Net revenue	$ 292,033	$ 566,542
China \| Net revenue
Disaggregation of Revenue [Line Items]
% of Total	44.00%	45.00%
Malaysia
Disaggregation of Revenue [Line Items]
Net revenue	$ 96,127	$ 186,750
Malaysia \| Net revenue
Disaggregation of Revenue [Line Items]
% of Total	14.00%	15.00%
Philippines
Disaggregation of Revenue [Line Items]
Net revenue	$ 55,416	$ 113,183
Philippines \| Net revenue
Disaggregation of Revenue [Line Items]
% of Total	8.00%	9.00%
Thailand
Disaggregation of Revenue [Line Items]
Net revenue	$ 39,256	$ 80,790
Thailand \| Net revenue
Disaggregation of Revenue [Line Items]
% of Total	6.00%	6.00%
United States
Disaggregation of Revenue [Line Items]
Net revenue	$ 16,563	$ 32,592
United States \| Net revenue
Disaggregation of Revenue [Line Items]
% of Total	2.00%	3.00%
Other
Disaggregation of Revenue [Line Items]
Net revenue	$ 165,915	$ 290,084
Other \| Net revenue
Disaggregation of Revenue [Line Items]
% of Total	26.00%	22.00%

Revenue - Net Revenue by Customer Type (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Aug. 04, 2018	Aug. 04, 2018
Disaggregation of Revenue [Line Items]
Net revenue	$ 665,310	$ 1,269,941
Direct customers
Disaggregation of Revenue [Line Items]
Net revenue	$ 532,351	$ 1,002,827
Direct customers \| Net revenue
Disaggregation of Revenue [Line Items]
% of Total	80.00%	79.00%
Distributors
Disaggregation of Revenue [Line Items]
Net revenue	$ 132,959	$ 267,114
Distributors \| Net revenue
Disaggregation of Revenue [Line Items]
% of Total	20.00%	21.00%

Revenue - Contract Liabilities (Details) $ in Millions	6 Months Ended
Revenue - Contract Liabilities (Details) $ in Millions	Aug. 04, 2018 USD ($)
Change in Contract with Customer, Asset and Liability [Abstract]
Beginning balance	$ 79.6
Estimates for additional shipments	363.3
Credit memos issued	336.7
Ending balance	$ 106.2

Goodwill and Acquired Intangible Assets, Net - Goodwill (Details) - USD ($) $ in Thousands	Aug. 04, 2018	Feb. 03, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 5,497,608	$ 1,993,310

Goodwill and Acquired Intangible Assets, Net - Acquired Intangible Assets, Net - Additional Information (Details) - USD ($)	3 Months Ended	6 Months Ended
	Aug. 04, 2018	Aug. 04, 2018	Jul. 29, 2017	Jul. 06, 2018
Finite-Lived Intangible Assets [Line Items]
Intangibles acquired		$ 0
Amortization expense of acquired intangible assets	$ 25,900,000	$ 25,939,000	$ 2,136,000
Cavium
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets				$ 2,744,000,000

Goodwill and Acquired Intangible Assets, Net - Net Carrying Amounts and Weighted Average Amortization Period (Details) - USD ($) $ in Thousands	6 Months Ended
	Aug. 04, 2018	Feb. 03, 2018
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amounts	$ 2,231,000
Accumulated Amortization	(25,939)
Net Carrying Amounts	$ 2,205,061
Weighted average remaining amortization period (years)	7 years 9 months 29 days
Gross Carrying Amounts, Total acquired intangible assets	$ 2,744,000
Accumulated Amortization	(25,939)
Net Carrying Amounts, Total acquired intangible assets	2,718,061	$ 0
IPR&D
Acquired Indefinite-lived Intangible Assets [Line Items]
IPR&D	513,000
Developed technologies
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amounts	1,743,000
Accumulated Amortization	(18,984)
Net Carrying Amounts	$ 1,724,016
Weighted average remaining amortization period (years)	7 years 7 months 2 days
Accumulated Amortization	$ (18,984)
Customer contracts and related relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amounts	465,000
Accumulated Amortization	(6,501)
Net Carrying Amounts	$ 458,499
Weighted average remaining amortization period (years)	8 years 11 months 1 day
Accumulated Amortization	$ (6,501)
Trade names
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amounts	23,000
Accumulated Amortization	(454)
Net Carrying Amounts	$ 22,546
Weighted average remaining amortization period (years)	4 years 3 months 26 days
Accumulated Amortization	$ (454)

Goodwill and Acquired Intangible Assets, Net - Future Amortization (Details) $ in Thousands	Aug. 04, 2018 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Remainder of 2019	$ 157,380
2020	309,701
2021	301,580
2022	293,024
2023	285,596
Thereafter	857,780
Net Carrying Amounts	$ 2,205,061

Restructuring and Other Related Charges - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 04, 2018	Jul. 29, 2017	Aug. 04, 2018	Jul. 29, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring and other related charges	$ 35,415	$ 4,285	$ 36,982	$ 5,171
Cavium
Restructuring Cost and Reserve [Line Items]
Restructuring and other related charges	35,400		35,400
Restructuring charges			22,300
Cavium \| Severance and related costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	22,300		22,300
Cavium \| Facilities and related costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	11,000		11,000
Cavium \| Other exit-related costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 2,100		$ 2,100

Restructuring and Other Related Charges - Reconciliation of Beginning and Ending Restructuring Liability Balances by Major Type of Costs (Details) $ in Thousands	6 Months Ended
	Aug. 04, 2018 USD ($)	Feb. 03, 2018 USD ($)
Restructuring Reserve [Roll Forward]
Balance at beginning of period	$ 1,671
Net cash payments	(5,901)
Release of reserves	(307)
Exchange rate adjustment	(91)
Balance at end of period	30,748
Less: non-current portion	5,878
Current portion	24,870	$ 1,612
Continuing operations
Restructuring Reserve [Roll Forward]
Restructuring charges	35,376
Severance and related costs
Restructuring Reserve [Roll Forward]
Balance at beginning of period	654
Net cash payments	(3,617)
Release of reserves	(307)
Exchange rate adjustment	(91)
Balance at end of period	20,696
Less: non-current portion	0
Current portion	20,696
Severance and related costs \| Continuing operations
Restructuring Reserve [Roll Forward]
Restructuring charges	24,057
Facilities and related costs
Restructuring Reserve [Roll Forward]
Balance at beginning of period	462
Net cash payments	(1,743)
Release of reserves	0
Exchange rate adjustment	0
Balance at end of period	9,776
Less: non-current portion	5,878
Current portion	3,898
Facilities and related costs \| Continuing operations
Restructuring Reserve [Roll Forward]
Restructuring charges	11,057
Other exit-related costs
Restructuring Reserve [Roll Forward]
Balance at beginning of period	555
Net cash payments	(541)
Release of reserves	0
Exchange rate adjustment	0
Balance at end of period	276
Less: non-current portion	0
Current portion	276
Other exit-related costs \| Continuing operations
Restructuring Reserve [Roll Forward]
Restructuring charges	$ 262

Supplemental Financial Information - Inventories (Details) - USD ($) $ in Thousands	Aug. 04, 2018	Feb. 03, 2018
Inventories:
Work-in-process	$ 257,906	$ 103,711
Finished goods	215,523	66,328
Total inventories	473,429	$ 170,039
Cavium
Inventories:
Inventory step-up adjustment	$ 200,400

Supplemental Financial Information - Property and Equipment, Net (Details) - USD ($) $ in Thousands	Aug. 04, 2018	Feb. 03, 2018
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 1,019,434	$ 902,483
Less: Accumulated depreciation and amortization	(691,789)	(700,261)
Total property and equipment, net	327,645	202,222
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	609,376	535,416
Land, buildings, and leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	279,880	247,675
Computer software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	102,943	98,253
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 27,235	$ 21,139

Supplemental Financial Information - Accrued Liabilities (Details) - USD ($) $ in Thousands	Aug. 04, 2018	Feb. 03, 2018
Accrued liabilities:
Contract liabilities	$ 106,191	$ 0
Technology license obligations	76,050	28,488
Accrued royalties	18,003	11,860
Accrued rebates	0	9,292
Accrued legal related expenses	14,664	13,050
Unsettled investment trades	0	4,497
Restructuring liabilities	24,870	1,612
Accrued income tax payable	9,735	959
Other	27,585	17,200
Total accrued liabilities	$ 277,098	$ 86,958

Supplemental Financial Information - Changes in Accumulated Other Comprehensive Income (Loss) by Components (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 04, 2018	Jul. 29, 2017	Aug. 04, 2018	Jul. 29, 2017
Increase (Decrease) in AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			$ 4,141,413
Other comprehensive income (loss) before reclassifications				$ 2,195
Amounts reclassified from accumulated other comprehensive income (loss)				(1,319)
Other comprehensive income, net of tax	$ 2,404	$ 1,063	2,322	876
Ending balance	7,665,066		7,665,066
Unrealized Gain (Loss) on Marketable Securities
Increase (Decrease) in AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			(2,322)	(801)
Other comprehensive income (loss) before reclassifications			(733)	(146)
Amounts reclassified from accumulated other comprehensive income (loss)			3,055	29
Other comprehensive income, net of tax			2,322	(117)
Ending balance	$ 0	(918)	$ 0	(918)
Unrealized Gain (Loss) on Cash Flow Hedges
Increase (Decrease) in AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance				824
Other comprehensive income (loss) before reclassifications				2,341
Amounts reclassified from accumulated other comprehensive income (loss)				(1,348)
Other comprehensive income, net of tax				993
Ending balance		1,817		1,817
Total
Increase (Decrease) in AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance				23
Ending balance		$ 899		$ 899

Supplemental Financial Information - Consolidated Statements of Cash Flows (Details) - shares shares in Billions	3 Months Ended	6 Months Ended
	Aug. 04, 2018	Aug. 04, 2018
Cavium
Business Acquisition [Line Items]
Noncash consideration paid for the acquisition	3.3	3.3

Investments - Summary of Investments (Details) - USD ($) $ in Thousands	Aug. 04, 2018	Feb. 03, 2018
Investments, Debt and Equity Securities [Abstract]
Time deposits on hand	$ 25,000
Short-term, highly liquid investments	$ 78,500	$ 267,600
Held-to-maturity:
Amortized Cost		955,112
Gross Unrealized Gains		521
Gross Unrealized Losses		(2,843)
Estimated Fair Value		952,790
Total short-term investments
Held-to-maturity:
Amortized Cost		955,112
Gross Unrealized Gains		521
Gross Unrealized Losses		(2,843)
Estimated Fair Value		952,790
Time deposits
Held-to-maturity:
Amortized Cost		150,000
Gross Unrealized Gains		0
Gross Unrealized Losses		0
Estimated Fair Value		150,000
U.S. government and agency debt
Available-for-sale:
Amortized Cost		248,336
Gross Unrealized Gains		49
Gross Unrealized Losses		(644)
Estimated Fair Value		247,741
Foreign government and agency debt
Available-for-sale:
Amortized Cost		7,004
Gross Unrealized Gains		0
Gross Unrealized Losses		(17)
Estimated Fair Value		6,987
Municipal debt securities
Available-for-sale:
Amortized Cost		2,734
Gross Unrealized Gains		0
Gross Unrealized Losses		(6)
Estimated Fair Value		2,728
Corporate debt securities
Available-for-sale:
Amortized Cost		504,609
Gross Unrealized Gains		469
Gross Unrealized Losses		(1,999)
Estimated Fair Value		503,079
Asset backed securities
Available-for-sale:
Amortized Cost		42,429
Gross Unrealized Gains		3
Gross Unrealized Losses		(177)
Estimated Fair Value		$ 42,255

Investments - Gross Realized Gains and Losses on Sales of Available-for-Sale Securities (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 04, 2018	Jul. 29, 2017	Aug. 04, 2018	Jul. 29, 2017
Investments, Debt and Equity Securities [Abstract]
Gross realized gains	$ 369	$ 16	$ 371	$ 85
Gross realized losses	(2,575)	(69)	(3,437)	(113)
Total net realized gains (losses)	$ (2,206)	$ (53)	$ (3,066)	$ (28)

Investments - Contractual Maturities of Available for Sale Securities (Details) - USD ($) $ in Thousands	Aug. 04, 2018	Feb. 03, 2018
Amortized Cost
Due in one year or less	$ 25,000	$ 554,247
Due between one and five years	0	400,866
Due over five years	0	0
Amortized Cost	25,000	955,113
Estimated Fair Value
Due in one year or less	25,000	553,866
Due between one and five years	0	398,924
Due over five years	0	0
Estimated Fair Value	$ 25,000	$ 952,790

Investments - Summary of Investments Gross Unrealized Losses and Fair Value (Details) $ in Thousands	Feb. 03, 2018 USD ($)
Fair Value
Less than 12 months	$ 445,516
12 months or more	103,298
Total	548,814
Unrealized Loss
Less than 12 months	(1,964)
12 months or more	(879)
Total	(2,843)
U.S. government and agency debt
Fair Value
Less than 12 months	148,538
12 months or more	51,332
Total	199,870
Unrealized Loss
Less than 12 months	(298)
12 months or more	(346)
Total	(644)
Foreign government and agency debt
Fair Value
Less than 12 months	3,993
12 months or more	2,994
Total	6,987
Unrealized Loss
Less than 12 months	(1)
12 months or more	(16)
Total	(17)
Municipal debt securities
Fair Value
Less than 12 months	1,969
12 months or more	0
Total	1,969
Unrealized Loss
Less than 12 months	(6)
12 months or more	0
Total	(6)
Corporate debt securities
Fair Value
Less than 12 months	253,380
12 months or more	46,805
Total	300,185
Unrealized Loss
Less than 12 months	(1,514)
12 months or more	(485)
Total	(1,999)
Asset backed securities
Fair Value
Less than 12 months	37,636
12 months or more	2,167
Total	39,803
Unrealized Loss
Less than 12 months	(145)
12 months or more	(32)
Total	$ (177)

Derivative Financial Instruments - Additional Information (Details) - USD ($)	3 Months Ended		6 Months Ended
	Aug. 04, 2018	Jul. 29, 2017	Aug. 04, 2018	Jul. 29, 2017	Feb. 03, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative, notional amount	$ 0		$ 0		$ 0
Hedge ineffectiveness from derivative financial instruments	0	$ 0	0	$ 0
Cash flow hedges were terminated as a result of forecasted transactions that did not occur	$ 0	$ 0	$ 0	$ 0

Derivative Financial Instruments - Information about Gains (Losses) Associated with Derivative Financial Instruments (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jul. 29, 2017	Jul. 29, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gains (Losses) in Statements of Operations	$ 1,582	$ 2,120
Cash flow hedges \| Forward contracts \| Research and development
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gains (Losses) in Statements of Operations	1,251	1,726
Cash flow hedges \| Forward contracts \| Selling, general and administrative
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gains (Losses) in Statements of Operations	$ 331	$ 394

Derivative Financial Instruments - Gains (Losses) Reclassified from Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 04, 2018	Jul. 29, 2017	Aug. 04, 2018	Jul. 29, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Research and development	$ 216,285	$ 180,871	$ 393,019	$ 368,967
Selling, general and administrative	$ 133,701	55,659	$ 206,014	110,763
Reclassification out of accumulated other comprehensive income (loss)
Derivative Instruments, Gain (Loss) [Line Items]
Operating costs and expenses		1,268		1,348
Reclassification out of accumulated other comprehensive income (loss) \| Cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Research and development		1,003		1,074
Selling, general and administrative		$ 265		$ 274

Fair Value Measurements (Details) - USD ($) $ in Thousands	Aug. 04, 2018	Feb. 03, 2018
Assets
Short-term Investments		$ 952,790
Fair Value
Assets
Total assets	$ 104,358	1,221,261
Fair Value \| Other non-current assets \| Severance pay fund
Assets
Other non-current assets	869	896
Fair Value \| Money market funds
Assets
Cash equivalents	17,759	18,503
Fair Value \| Time deposits
Assets
Cash equivalents	60,730	65,117
Fair Value \| Time deposits \| Short-term investments
Assets
Short-term Investments	25,000	150,000
Fair Value \| U.S. government and agency debt
Assets
Cash equivalents		51,589
Fair Value \| U.S. government and agency debt \| Short-term investments
Assets
Short-term Investments		247,741
Fair Value \| Foreign government and agency debt \| Short-term investments
Assets
Short-term Investments		6,987
Fair Value \| Municipal debt securities
Assets
Cash equivalents		5,290
Fair Value \| Municipal debt securities \| Short-term investments
Assets
Short-term Investments		2,728
Fair Value \| Corporate debt securities
Assets
Cash equivalents		127,076
Fair Value \| Corporate debt securities \| Short-term investments
Assets
Short-term Investments		503,079
Fair Value \| Asset backed securities \| Short-term investments
Assets
Short-term Investments		42,255
Fair Value \| Level 1
Assets
Total assets	17,759	317,833
Fair Value \| Level 1 \| Other non-current assets \| Severance pay fund
Assets
Other non-current assets	0	0
Fair Value \| Level 1 \| Money market funds
Assets
Cash equivalents	17,759	18,503
Fair Value \| Level 1 \| Time deposits
Assets
Cash equivalents	0	0
Fair Value \| Level 1 \| Time deposits \| Short-term investments
Assets
Short-term Investments	0	0
Fair Value \| Level 1 \| U.S. government and agency debt
Assets
Cash equivalents		51,589
Fair Value \| Level 1 \| U.S. government and agency debt \| Short-term investments
Assets
Short-term Investments		247,741
Fair Value \| Level 1 \| Foreign government and agency debt \| Short-term investments
Assets
Short-term Investments		0
Fair Value \| Level 1 \| Municipal debt securities
Assets
Cash equivalents		0
Fair Value \| Level 1 \| Municipal debt securities \| Short-term investments
Assets
Short-term Investments		0
Fair Value \| Level 1 \| Corporate debt securities
Assets
Cash equivalents		0
Fair Value \| Level 1 \| Corporate debt securities \| Short-term investments
Assets
Short-term Investments		0
Fair Value \| Level 1 \| Asset backed securities \| Short-term investments
Assets
Short-term Investments		0
Fair Value \| Level 2
Assets
Total assets	86,599	903,428
Fair Value \| Level 2 \| Notes
Assets
Estimated aggregate fair value of debt	1,000,000
Fair Value \| Level 2 \| Other non-current assets \| Severance pay fund
Assets
Other non-current assets	869	896
Fair Value \| Level 2 \| Money market funds
Assets
Cash equivalents	0	0
Fair Value \| Level 2 \| Time deposits
Assets
Cash equivalents	60,730	65,117
Fair Value \| Level 2 \| Time deposits \| Short-term investments
Assets
Short-term Investments	25,000	150,000
Fair Value \| Level 2 \| U.S. government and agency debt
Assets
Cash equivalents		0
Fair Value \| Level 2 \| U.S. government and agency debt \| Short-term investments
Assets
Short-term Investments		0
Fair Value \| Level 2 \| Foreign government and agency debt \| Short-term investments
Assets
Short-term Investments		6,987
Fair Value \| Level 2 \| Municipal debt securities
Assets
Cash equivalents		5,290
Fair Value \| Level 2 \| Municipal debt securities \| Short-term investments
Assets
Short-term Investments		2,728
Fair Value \| Level 2 \| Corporate debt securities
Assets
Cash equivalents		127,076
Fair Value \| Level 2 \| Corporate debt securities \| Short-term investments
Assets
Short-term Investments		503,079
Fair Value \| Level 2 \| Asset backed securities \| Short-term investments
Assets
Short-term Investments		42,255
Fair Value \| Level 3
Assets
Total assets	0	0
Fair Value \| Level 3 \| Other non-current assets \| Severance pay fund
Assets
Other non-current assets	0	0
Fair Value \| Level 3 \| Money market funds
Assets
Cash equivalents	0	0
Fair Value \| Level 3 \| Time deposits
Assets
Cash equivalents	0	0
Fair Value \| Level 3 \| Time deposits \| Short-term investments
Assets
Short-term Investments	$ 0	0
Fair Value \| Level 3 \| U.S. government and agency debt
Assets
Cash equivalents		0
Fair Value \| Level 3 \| U.S. government and agency debt \| Short-term investments
Assets
Short-term Investments		0
Fair Value \| Level 3 \| Foreign government and agency debt \| Short-term investments
Assets
Short-term Investments		0
Fair Value \| Level 3 \| Municipal debt securities
Assets
Cash equivalents		0
Fair Value \| Level 3 \| Municipal debt securities \| Short-term investments
Assets
Short-term Investments		0
Fair Value \| Level 3 \| Corporate debt securities
Assets
Cash equivalents		0
Fair Value \| Level 3 \| Corporate debt securities \| Short-term investments
Assets
Short-term Investments		0
Fair Value \| Level 3 \| Asset backed securities \| Short-term investments
Assets
Short-term Investments		$ 0

Commitments and Contingencies - Future Minimum Payments (Details) - USD ($) $ in Thousands	Aug. 04, 2018	Feb. 03, 2018
Operating Leases
Remainder of 2019	$ 31,994
2020	40,812
2021	28,299
2022	26,005
2023	19,215
Thereafter	28,569
Total future minimum lease payments	174,894
Technology License Obligations
Less: Current portion	(76,050)	$ (28,488)
Remainder of 2019	54,928
2020	71,334
2021	36,099
2022	26,005
2023	19,215
Thereafter	28,569
Total future minimum lease payments	236,150
Technology License Obligations
Technology License Obligations
Remainder of 2019	22,934
2020	30,522
2021	7,800
2022	0
2023	0
Thereafter	0
Total future minimum lease payments	61,256
Less: Amount representing interest	(986)
Present value of future minimum payments	60,270
Less: Current portion	(35,352)
Non-current portion	$ 24,918

Commitments and Contingencies - Purchase Commitments (Details) $ in Millions	Aug. 04, 2018 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Outstanding purchase orders	$ 160.8

Shareholder's Equity - Additional Information (Details) - Cavium Plans	Jul. 06, 2018 shares
Class of Stock [Line Items]
Number of common stock issuable	15,824,555
Stock Options
Class of Stock [Line Items]
Number of common stock issuable	2,535,940
Restricted Stock Unit
Class of Stock [Line Items]
Number of common stock issuable	13,288,615

Shareholder's Equity - Cavium 2016 EIP (Details) - Cavium 2016 EIP	6 Months Ended
	Aug. 04, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	4 years
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award expiration period	7 years
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award expiration period	10 years

Shareholder's Equity - Cavium 2007 EIP (Details) - Cavium 2007 EIP	6 Months Ended
	Aug. 04, 2018
Stock Options \| Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	12.50%
Award vesting period	6 months
Stock Options \| Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	2.08%
Award vesting period	3 years 6 months
Restricted Stock Unit
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	4 years
Restricted Stock Unit \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award expiration period	7 years
Restricted Stock Unit \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award expiration period	10 years

Shareholder's Equity - QLogic 2005 Plan (Details) - QLogic 2005 Plan	6 Months Ended
	Aug. 04, 2018
Restricted Stock Unit
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	4 years
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	4 years
Award term	10 years

Shareholder's Equity - Cavium Acquisition-related Equity Awards (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 04, 2018	Jul. 29, 2017	Aug. 04, 2018	Jul. 29, 2017	Jul. 06, 2018	Jul. 05, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 73,423	$ 22,422	$ 97,275	$ 46,439
Cavium
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	47,100		$ 37,800
Accelerated vesting of equity awards	$ 37,800
Cavium \| Cavium Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of awards assumed in acquisition					$ 357,100
Share-based compensation expense to be recognized					$ 288,200	$ 68,900

Shareholder's Equity - Share-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Aug. 04, 2018	Jul. 29, 2017	Aug. 04, 2018	Jul. 29, 2017	Feb. 03, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total share-based compensation	$ 73,423	$ 22,422	$ 97,275	$ 46,439
Share-based compensation capitalized			2,300		$ 1,300
Continuing operations
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total share-based compensation	73,423	21,367	97,275	43,106
Continuing operations \| Cost of goods sold
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total share-based compensation	4,748	1,810	6,653	3,236
Continuing operations \| Research and development
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total share-based compensation	26,859	12,371	41,144	26,361
Continuing operations \| Selling, general and administrative
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total share-based compensation	41,816	7,186	49,478	13,509
Discontinued operations
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total share-based compensation	0	1,055	0	3,333
Discontinued operations \| Cost of goods sold
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total share-based compensation	0	0	0	0
Discontinued operations \| Research and development
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total share-based compensation	0	954	0	3,098
Discontinued operations \| Selling, general and administrative
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total share-based compensation	$ 0	$ 101	$ 0	$ 235

Income Tax (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Aug. 04, 2018	Jul. 29, 2017	Aug. 04, 2018	Jul. 29, 2017	Feb. 03, 2018
Income Tax Disclosure [Abstract]
Current income tax expense (benefit)	$ (30.0)		$ (26.2)
Unrecognized tax benefits, increase (decrease)	(7.5)		(7.2)
Expense (benefit) related to other discrete items	(2.8)		(2.4)
Gross unrecognized tax benefits	177.5		177.5		$ 23.2
Increase in gross unrecognized tax benefits resulting from acquisition			154.3
Tax benefit if unrecognized tax benefit is realized subsequently	148.5		148.5
Interest and penalties accrued on unrecognized tax benefits	13.9		13.9		$ 17.2
Uncertain tax positions, decrease from the lapse of statutes of limitation in various jurisdictions during next 12 months	13.5		13.5
Tax incentives, decrease in foreign taxes	$ 0.5	$ 0.8	$ 1.2	$ 1.5
Tax incentives, effect on net income per share (less than) (in usd per share)	$ 0.01	$ 0.01	$ 0.01	$ 0.01
Undistributed earnings of foreign subsidiaries	$ 432.0		$ 432.0
Income Taxes [Line Items]
Cash, cash equivalents and short-term investments	524.0		524.0
Foreign Subsidiaries
Income Taxes [Line Items]
Cash, cash equivalents and short-term investments	$ 510.0		510.0
Increase in tax expense in the event of undistributed earnings needed by parent company or no longer considered indefinitely reinvested outside of Bermuda			$ 113.0

Net Income Per Share - Additional Information (Details)		3 Months Ended		6 Months Ended
Net Income Per Share - Additional Information (Details)	Jul. 06, 2018 $ / shares shares	Aug. 04, 2018 shares	Jul. 29, 2017 shares	Aug. 04, 2018 shares	Jul. 29, 2017 shares
Business Acquisition [Line Items]
Weighted average shares — basic (in shares)		552,238,000	500,817,000	524,787,000	502,303,000
Weighted average shares — diluted (in shares)		562,149,000	510,309,000	535,433,000	513,951,000
Cavium
Business Acquisition [Line Items]
Number of shares issued in acquisition	153,376,408
Acquisition share price (in usd per share) \| $ / shares	$ 21.34
Number of common shares per Cavium share	2.1757
Number of shares issued in exchange of employee accelerated awards	1,100,000
Weighted average shares — basic (in shares)		50,900,000		25,500,000
Weighted average shares — diluted (in shares)		50,900,000		25,500,000

Net Income Per Share - Computations of Basic and Diluted Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 04, 2018	Jul. 29, 2017	Aug. 04, 2018	Jul. 29, 2017
Numerator:
Income from continuing operations, net of tax	$ 6,759	$ 135,450	$ 135,371	$ 235,042
Income from discontinued operations, net of tax	0	29,809	0	36,838
Net income	$ 6,759	$ 165,259	$ 135,371	$ 271,880
Denominator:
Weighted average shares — basic (in shares)	552,238	500,817	524,787	502,303
Effect of dilutive securities:
Share-based awards (in shares)	9,911	9,492	10,646	11,648
Weighted average shares — diluted (in shares)	562,149	510,309	535,433	513,951
Income from continuing operations per share:
Basic (in usd per share)	$ 0.01	$ 0.27	$ 0.26	$ 0.47
Diluted (in usd per share)	0.01	0.26	0.25	0.46
Income from discontinued operations per share:
Basic (in usd per share)	0.00	0.06	0.00	0.07
Diluted (in usd per share)	0.00	0.06	0.00	0.07
Net income per share:
Net income per share - Basic (in usd per share)	0.01	0.33	0.26	0.54
Net income per share - Diluted (in usd per share)	$ 0.01	$ 0.32	$ 0.25	$ 0.53

Net Income Per Share - Anti-dilutive Potential Shares (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Aug. 04, 2018	Jul. 29, 2017	Aug. 04, 2018	Jul. 29, 2017
Earnings Per Share [Abstract]
Share-based awards	5,718	2,770	5,604	7,301

Segment and Geographic Information (Details) $ in Thousands	6 Months Ended
Segment and Geographic Information (Details) $ in Thousands	Aug. 04, 2018 USD ($) segment	Feb. 03, 2018 USD ($)
Segment Reporting [Abstract]
Number of reportable segments \| segment	1
Segment Reporting Information [Line Items]
Total property and equipment, net	$ 327,645	$ 202,222
United States
Segment Reporting Information [Line Items]
Total property and equipment, net	241,586	156,053
Others
Segment Reporting Information [Line Items]
Total property and equipment, net	$ 86,059	$ 46,169