Revenue from Contract with Customer [Abstract] Revenue Revenue from Contract with Customer [Text Block] Commitments and Contingencies Disclosure [Abstract] Standard warranty period Standard Product Warranty Time Period Standard Product Warranty Time Period Extended warranty period (more than) Extended Product Warranty Period Extended Product Warranty Period Accounting Policies [Abstract] Inventory, Current [Table] Inventory, Current [Table] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Inventory [Line Items] Inventory [Line Items] Inventory turnover period (in days) Inventory Turnover Period Inventory Turnover Period Loss Contingencies [Table] Loss Contingencies [Table] Litigation Case [Axis] Litigation Case [Axis] Litigation Case [Domain] Litigation Case [Domain] Luna Litigation and Consolidated Cases Luna Litigation and Consolidated Cases [Member] Luna Litigation and Consolidated Cases [Member] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Number of additional claims consolidated Loss Contingency, Number of New Claims Consolidated Loss Contingency, Number of New Claims Consolidated Payment made to Marvell Settlement Fund Loss Contingency, Damages Paid, Value Litigation settlement, amount Litigation Settlement, Amount Awarded to Other Party Business Combinations [Abstract] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Cavium Cavium, Inc. [Member] Cavium, Inc. [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Cash consideration to Cavium common stockholders Payments to Acquire Businesses, Gross Common stock (153,376,408 shares of the Company's common stock at $21.34 per share) Business Combination, Consideration Transferred, Equity Interests Issued and Issuable Cash consideration for intrinsic value of vested director stock options and employee accelerated awards attributable to pre-acquisition service Business Combination, Cash Consideration Transferred, Employee Accelerated Awards Business Combination, Cash Consideration Transferred, Employee Accelerated Awards Stock consideration for employee accelerated awards attributable to pre-acquisition service Business Combination, Consideration Transferred, Employee Accelerated Awards Business Combination, Consideration Transferred, Employee Accelerated Awards Fair value of the replacement equity awards attributable to pre-acquisition service Business Combination, Step Acquisition, Equity Interest in Acquiree, Fair Value Total merger consideration Business Combination, Consideration Transferred, Including Equity Interest in Acquiree Held Prior to Combination Number of shares issued in acquisition Business Acquisition, Equity Interest Issued or Issuable, Number of Shares Acquisition share price (in usd per share) Business Acquisition, Share Price Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] Outside Director Equity Compensation Policy Outside Director Equity Compensation Policy [Member] Outside Director Equity Compensation Policy [Member] Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] RSUs Restricted Stock Units (RSUs) [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Equity awards, aggregate fair market value Share based Compensation Arrangement by Share based Payment Award, Equity Instruments Other than Options, Grants in Period, Aggregate Fair Value Share based Compensation Arrangement by Share based Payment Award, Equity Instruments Other than Options, Grants in Period, Aggregate Fair Value Number of shares authorized Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Equity awards, vesting percentage Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Equity awards, vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] Minimum Operating Lease Payments Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] 2020 Operating Leases, Future Minimum Payments Due, Next Twelve Months 2021 Operating Leases, Future Minimum Payments, Due in Two Years 2022 Operating Leases, Future Minimum Payments, Due in Three Years 2023 Operating Leases, Future Minimum Payments, Due in Four Years 2024 Operating Leases, Future Minimum Payments, Due in Five Years Thereafter Operating Leases, Future Minimum Payments, Due Thereafter Total future minimum lease payments Operating Leases, Future Minimum Payments Due Organization, Consolidation and Presentation of Financial Statements [Abstract] Supplemental Financial Information Additional Financial Information Disclosure [Text Block] Share-based compensation capitalized in inventory Other Inventory, Capitalized Costs, Gross Title of Individual [Axis] Title of Individual [Axis] Relationship to Entity [Domain] Relationship to Entity [Domain] Certain Members of Executive Management Certain Members Of Executive Management [Member] Certain Members Of Executive Management [Member] Share-based compensation expense Allocated Share-based Compensation Expense Earnings Per Share [Abstract] Net Income (Loss) Per Share Earnings Per Share [Text Block] Schedule of Cash and Cash Equivalents Schedule of Cash and Cash Equivalents [Table Text Block] Schedule of Provision for Sales Returns and Allowances Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Schedule of Inventories Schedule of Inventory, Current [Table Text Block] Schedule of Property and Equipment, Net Property, Plant and Equipment [Table Text Block] Schedule of Other Non-current Assets Schedule of Other Assets, Noncurrent [Table Text Block] Schedule of Accrued Liabilities Schedule of Accrued Liabilities [Table Text Block] Schedule of Deferred Income Schedule Of Deferred Income [Table Text Block] Schedule Of Deferred Income [Table Text Block] Schedule of Other Non-current Liabilities Other Noncurrent Liabilities [Table Text Block] Schedule of Changes in Accumulated Other Comprehensive Income (Loss) Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Schedule of Supplemental Cash Flow Information Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Investments, Debt and Equity Securities [Abstract] Short-term, highly liquid investments Cash Equivalents, at Carrying Value Fair Value Disclosures [Abstract] Fair Value Measurements Fair Value Disclosures [Text Block] Share-based compensation expense Adjustment to inventories Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Inventory Interest expense Interest Expense Acquisition related costs Business Combination, Acquisition Related Costs Pro forma net revenue Business Acquisition, Pro Forma Revenue Pro forma net loss Business Acquisition, Pro Forma Net Income (Loss) Other non-current liabilities: Other Liabilities, Noncurrent [Abstract] Long-term restructuring liabilities Restructuring Reserve, Noncurrent Technology license obligations Contractual Obligation, Noncurrent Non current portion of contractual obligation as of the balance sheet date. Long-term accrued employee compensation Employee-related Liabilities, Noncurrent Total of the carrying values as of the balance sheet date of obligations incurred through that date and payable for obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits. For classified balance sheets, used to reflect the noncurrent portion of the liabilities (due beyond one year or one operating cycle, if longer); for unclassified balance sheets, used to reflect the total liabilities (regardless of due date). Other Other Accrued Liabilities, Noncurrent Other non-current liabilities Other Liabilities, Noncurrent Goodwill and Intangible Assets Disclosure [Abstract] Schedule of Finite-Lived Intangible Assets by Major Class Schedule of Finite-Lived Intangible Assets [Table Text Block] Schedule of Indefinite-Lived Intangible Assets Schedule of Indefinite-Lived Intangible Assets [Table Text Block] Schedule of Finite-Lived Intangible Assets, Future Amortization Expense Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Purchase commitment, outstanding commitment Unrecorded Unconditional Purchase Obligation Weighted average shares outstanding: Earnings Per Share, Diluted, Other Disclosures [Abstract] Share-based awards Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Change in Contract with Customer, Asset and Liability [Abstract] Change in Contract with Customer, Asset and Liability [Abstract] Beginning balance Contract with Customer, Liability Estimates for additional shipments Contract with Customer, Liability, Cumulative Catch-up Adjustment to Revenue, Change in Measure of Progress Credit memos issued Contract With Customer, Liability, Credit Memos Issued Contract With Customer, Liability, Credit Memos Issued Ending balance Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table] Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Developed technologies Developed Technology Rights [Member] Customer contracts and related relationships Customer Contracts And Relationships [Member] Customer Contracts And Relationships [Member] Trade names Trade Names [Member] Acquired Finite-Lived Intangible Assets [Line Items] Acquired Finite-Lived Intangible Assets [Line Items] Gross Carrying Amounts Finite-Lived Intangible Assets, Gross Accumulated Amortization and Write-Offs Finite-Lived Intangible Assets, Accumulated Amortization Net Carrying Amounts Finite-Lived Intangible Assets, Net Weighted average remaining amortization period Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Gross Carrying Amounts, Total acquired intangible assets Intangible Assets, Gross (Excluding Goodwill) IPR&D Indefinite-lived Intangible Assets (Excluding Goodwill) Net Carrying Amounts Intangible Assets, Net (Excluding Goodwill) Revenue, Initial Application Period Cumulative Effect Transition [Table] Revenue, Initial Application Period Cumulative Effect Transition [Table] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Accounting Standards Update 2014-09 Accounting Standards Update 2014-09 [Member] Initial Application Period Cumulative Effect Transition [Axis] Initial Application Period Cumulative Effect Transition [Axis] Initial Application Period Cumulative Effect Transition [Domain] Initial Application Period Cumulative Effect Transition [Domain] Difference between Revenue Guidance in Effect before and after Topic 606 Difference between Revenue Guidance in Effect before and after Topic 606 [Member] Revenue, Initial Application Period Cumulative Effect Transition [Line Items] Revenue, Initial Application Period Cumulative Effect Transition [Line Items] Retained earnings Retained Earnings (Accumulated Deficit) Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Financial Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Employee Stock Purchase Plan Employee Stock Purchase Plan [Member] Employee Stock Purchase Plan [Member] Estimated fair value (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Expected volatility (as a percent) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Expected term (in years) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Risk-free interest rate (as a percent) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Expected dividend yield (as a percent) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Number of operating segments Number of Operating Segments Number of components Number Of Operating Components Number Of Operating Components Number of reporting units for impairment testing Number of Reporting Units Time-Based Stock Options Time Based Option Award [Member] Time Based Option Award [Member] Weighted average fair value (in usd per share) Investments Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Income Tax Disclosure [Abstract] Income Taxes [Table] Income Taxes [Table] Income Taxes [Table] Income Tax Authority [Axis] Income Tax Authority [Axis] Income Tax Authority [Domain] Income Tax Authority [Domain] Federal Domestic Tax Authority [Member] State State and Local Jurisdiction [Member] Foreign Foreign Tax Authority [Member] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] California CALIFORNIA Other State Other State [Member] Other State [Member] Tax Credit Carryforward [Axis] Tax Credit Carryforward [Axis] Tax Credit Carryforward, Name [Domain] Tax Credit Carryforward, Name [Domain] Research Tax Credit Research Tax Credit Carryforward [Member] Research and Investment Tax Credit Research and Investment Tax Credit Carryforward [Member] Research and Investment Tax Credit Carryforward [Member] Income Tax Authority, Name [Axis] Income Tax Authority, Name [Axis] Income Tax Authority, Name [Domain] Income Tax Authority, Name [Domain] Office of the Tax Commissioner, Bermuda Office of the Tax Commissioner, Bermuda [Member] Economic Development Board of Singapore Pioneer Status Economic Development Board of Singapore Pioneer Status [Member] Economic Development Board of Singapore Pioneer Status [Member] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Marvell Israel Marvell Israel [Member] Marvell Israel [Member] Foreign Subsidiaries Foreign Subsidiaries [Member] Foreign Subsidiaries [Member] Income Taxes [Line Items] Income Taxes [Line Items] Income Taxes [Line Items] Valuation allowance Deferred Tax Assets, Valuation Allowance Decrease in valuation allowance Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount Net operating loss carryforwards Operating Loss Carryforwards Tax credit carryforwards Tax Credit Carryforward, Amount Operating loss carryforwards subject to annual limitation Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration Tax credit carryforwards subject to annual limitation Deferred Tax Assets, Tax Credit Carryforwards Applicable statutory rate Statutory Income Tax Rate Statutory Income Tax Rate Federal statutory tax rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Increase in income tax expense Increase (Decrease) in Income Taxes Undistributed earnings of foreign subsidiaries Undistributed Earnings of Foreign Subsidiaries Unrecognized deferred tax liability on undistributed earnings of foreign subsidiaries Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Undistributed Earnings of Foreign Subsidiaries Unrecognized tax benefit that would affect the effective income tax rate if recognized Unrecognized Tax Benefits that Would Impact Effective Tax Rate Unrecognized tax benefits offset by deferred tax assets Unrecognized Tax Benefits, Offset by Deferred Tax Assets Unrecognized Tax Benefits, Offset by Deferred Tax Assets Unrecognized tax benefit, interest and penalties accrued Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued Interest and penalties related to unrecognized tax benefits included in consolidated statements of operation Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense Uncertain tax positions decrease from the lapse of the statutes of limitation in various jurisdictions during the next 12 months Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit Expiration of tax exemption, period Income Tax Holiday, Expiration Term Duration of Tax Holiday (in years). Tax holidays, tax savings amount Income Tax Holiday, Aggregate Dollar Amount Tax holidays, per share effect on earnings (less than) (in usd per share) Income Tax Holiday, Income Tax Benefits Per Share Number of branches entitled to tax programs Number of Branches Entitled to Tax Programs Number of Branches Entitled to Tax Programs Cash, cash equivalents and short-term investments Cash, Cash Equivalents, and Short-term Investments Restructuring and Related Activities [Abstract] Schedule of Restructuring and Related Costs [Table] Schedule of Restructuring and Related Costs [Table] Restructuring Plan [Axis] Restructuring Plan [Axis] Restructuring Plan [Domain] Restructuring Plan [Domain] November 2016 and Other Restructuring November 2016 Restructuring [Member] November 2016 Restructuring [Member] July 2018 Restructuring Mobile and Other Prior Restructuring [Member] Mobile and Other Prior Restructuring [Member] Restructuring Type [Axis] Restructuring Type [Axis] Type of Restructuring [Domain] Type of Restructuring [Domain] Severance and related costs Employee Severance [Member] Facilities and related costs Facility Closing [Member] Other exit-related costs Other Restructuring [Member] Operating Activities [Axis] Operating Activities [Axis] Operating Activities [Domain] Operating Activities [Domain] Continuing operations Continuing Operations [Member] Discontinued operations Discontinued Operations [Member] Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] Restructuring Reserve [Roll Forward] Restructuring Reserve [Roll Forward] Balance at beginning of period Restructuring Reserve Restructuring charges Restructuring Charges Release of reserves - continuing operations Restructuring Reserve, Accrual Adjustment Net cash payments Payments for Restructuring Exchange rate adjustment Restructuring Reserve, Foreign Currency Translation Gain (Loss) Other Restructuring Reserve, Translation and Other Adjustment Balance at end of period Less: non-current portion Current portion Restructuring Reserve, Current Aggregate intrinsic value expected to vest Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Nonvested Number of shares expected to vest Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested and Expected to Vest, Outstanding, Number Share based Compensation Arrangement by Share based Payment Award, Equity Instruments Other Than Options, Vested and Expected to Vest, Outstanding Shares. Closing stock price (in usd per share) Share Price Unamortized compensation expense Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Unrecognized share based compensation cost, weighted-average period of recognition (in years) Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements or Change in Accounting Principle [Table] Accounting Standards Update 2016-02 Accounting Standards Update 2016-02 [Member] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Scenario, Forecast Scenario, Forecast [Member] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Right-of-use assets Operating Lease, Right-of-Use Asset Lease liabilities Operating Lease, Liability Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Financial Instrument [Axis] Financial Instrument [Axis] Financial Instruments [Domain] Financial Instruments [Domain] Money market funds Money Market Funds [Member] Time deposits Bank Time Deposits [Member] U.S. government and agency debt US Government Agencies Debt Securities [Member] Foreign government and agency debt Foreign Government Agencies Debt Securities [Member] Foreign Government Agencies Debt Securities [Member] Municipal debt securities Municipal Bonds [Member] Corporate debt securities Corporate Debt Securities [Member] Asset backed securities Asset-backed Securities [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Level 1 Fair Value, Inputs, Level 1 [Member] Level 2 Fair Value, Inputs, Level 2 [Member] Level 3 Fair Value, Inputs, Level 3 [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Assets Assets, Fair Value Disclosure [Abstract] Cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Short-term investments Investments, Fair Value Disclosure Other non-current assets Other Assets, Fair Value Disclosure Total assets Assets, Fair Value Disclosure Amortized Cost Debt Securities, Available-for-sale, Amortized Cost, Fiscal Year Maturity [Abstract] Due in one year or less Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Amortized Cost Due between one and five years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Amortized Cost Amortized Cost Debt Securities, Available-for-sale, Amortized Cost Estimated Fair Value Debt Securities, Available-for-sale, Fair Value, Fiscal Year Maturity [Abstract] Due in one year or less Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value Due between one and five years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value Estimated Fair Value Debt Securities, Available-for-sale Equity [Abstract] Shares Repurchased Stock Repurchase Program, Shares Repurchased [Roll Forward] Stock Repurchase Program, Shares Repurchased [Roll Forward] Cumulative balance at beginning of period (in shares) Stock Repurchase Program, Repurchased Shares Stock Repurchase Program, Repurchased Shares Repurchase of common stock under the stock repurchase program (in shares) Stock Repurchased During Period, Shares Cumulative balance at end of period (in shares) Weighted- Average Price per Share Stock Repurchase Program, Weighted Average Share Price [Roll Forward] Stock Repurchase Program, Weighted Average Share Price [Roll Forward] Cumulative balance at beginning of period (in usd per share) Stock Repurchase Program, Cumulative Share Price Stock Repurchase Program, Cumulative Share Price Repurchase of common stock under the stock repurchase program (in usd per share) Treasury Stock Acquired, Average Cost Per Share Cumulative balance at end of period (in usd per share) Amount Repurchased Stock Repurchase Program, Amount Repurchased [Roll Forward] Stock Repurchase Program, Amount Repurchased [Roll Forward] Cumulative balance at beginning of period Stock Repurchase Program, Repurchased Amount Stock Repurchase Program, Repurchased Amount Repurchase of common stock under the stock repurchase program Stock Repurchased During Period, Value Cumulative balance at end of period Stock repurchases pending settlement Stock Repurchase Program, Repurchase Amount Pending Settlement Stock Repurchase Program, Repurchase Amount Pending Settlement Debt Disclosure [Abstract] Summary of Outstanding Debt Schedule of Debt [Table Text Block] Aggregate Future Contractual Maturities of Debt Schedule of Maturities of Long-term Debt [Table Text Block] Employee Benefit Plans Compensation and Employee Benefit Plans [Text Block] Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Unrecognized tax benefits as of the beginning of the period Unrecognized Tax Benefits Increases related to positions related to Cavium Unrecognized Tax Benefits, Increase Resulting from Acquisition Increases related to prior year tax positions Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions Decreases related to prior year tax positions Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions Increases related to current year tax positions Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Settlements Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities Lapse in the statute of limitations Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations Foreign exchange gain Unrecognized Tax Benefits, Decrease Resulting from Foreign Currency Translation Foreign exchange gain Unrecognized Tax Benefits, Increase Resulting from Foreign Currency Translation Gross amounts of unrecognized tax benefits as of the end of the period Other non-current assets: Other Assets, Noncurrent [Abstract] Technology and other licenses Technology Licenses Carrying amount as of the balance sheet date of technology licenses which is deemed to have a finite economic life. Prepaid ship and debit Prepaid Expense, Noncurrent Deferred tax assets Deferred Income Tax Assets, Net Deferred debt and equity financing costs Debt Issuance Costs, Noncurrent, Net Other Other Assets, Miscellaneous, Noncurrent Other non-current assets Other Assets, Noncurrent Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Technology and Other Licenses Technology and Other Licenses [Member] Technology and Other Licenses [Member] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Amortization and write-off of acquired intangible assets Amortization of Intangible Assets Share repurchase program, amount authorized Stock Repurchase Program, Authorized Amount Share repurchase program, remaining available for future share repurchases Stock Repurchase Program, Remaining Authorized Repurchase Amount Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Class of Stock [Line Items] Class of Stock [Line Items] Number of shares repurchased (in shares) Amount of shares repurchased Average price per share (in usd per share) Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Selling, general and administrative Selling, General and Administrative Expenses [Member] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Prepaid Expenses and Other Current Assets Prepaid Expenses and Other Current Assets [Member] Other Non-current Assets Other Noncurrent Assets [Member] Long-term Debt Long-term Debt [Member] Cash consideration (in usd per share) Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Cash Paid Per Acquiree Share Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Cash Paid Per Acquiree Share Number of common shares per Cavium share Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Entity Shares Issued Per Acquiree Share Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Entity Shares Issued Per Acquiree Share Goodwill Goodwill Debt financing costs Debt Issuance Costs, Gross Equity issuance costs Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs Consolidated net revenue contributed by Cavium Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual Line of Credit Facility [Table] Line of Credit Facility [Table] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Line of Credit Line of Credit [Member] Term Loan Term Loan [Member] Term Loan [Member] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Revolving Credit Facility Revolving Credit Facility [Member] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] LIBOR London Interbank Offered Rate (LIBOR) [Member] Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Debt term Debt Instrument, Term Basis spread on variable rate (as a percent) Debt Instrument, Basis Spread on Variable Rate Effective interest rate Line of Credit Facility, Interest Rate at Period End Payment of principal Repayments of Long-term Debt Write off of unamortized debt issuance costs Write off of Deferred Debt Issuance Cost Amount available for draw Line of Credit Facility, Remaining Borrowing Capacity Unused commitment fee percentage Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Leverage ratio Debt Instrument, Covenant, Leverage Ratio Debt Instrument, Covenant, Leverage Ratio Schedule of Computation of Basic and Diluted Net Income (Loss) Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of Anti-dilutive Potential Shares Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] China CHINA Malaysia MALAYSIA United States UNITED STATES Philippines PHILIPPINES Thailand THAILAND Others Other Countries [Member] Other Countries [Member] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Geographic Concentration Risk Geographic Concentration Risk [Member] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Net revenue Sales Revenue, Net [Member] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Net revenue Revenue from Contract with Customer, Excluding Assessed Tax % of Total Concentration Risk, Percentage Rent expense, net of sublease income Operating Leases, Rent Expense, Net Gross realized gains Debt Securities, Available-for-sale, Realized Gain Gross realized losses Debt Securities, Available-for-sale, Realized Loss Total net realized gains (losses) Debt Securities, Available-for-sale, Realized Gain (Loss) Cash and cash equivalents Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents Accounts receivable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables Inventories Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory Prepaid expense and other current assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets Assets held for sale Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Assets Held For Sale Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Assets Held For Sale Property and equipment Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Acquired intangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill Other non-current assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets Accounts payable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable Accrued liabilities Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Current Liabilities, Accrued Liabilities Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Current Liabilities, Accrued Liabilities Accrued employee compensation Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Current Liabilities, Accrued Employee Compensation Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Current Liabilities, Accrued Employee Compensation Deferred income Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Revenue Current portion of long-term debt Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Long-term Debt Liabilities held for sale Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Liabilities Held For Sale Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Liabilities Held For Sale Long-term debt Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt Non-current income taxes payable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Income Taxes Payable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Income Taxes Payable Deferred tax liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Other non-current liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other Total merger consideration Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Measurement Period Adjustments Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustments [Abstract] Goodwill Goodwill, Purchase Accounting Adjustments Accrued liabilities Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Current Liabilities, Accrued Liabilities Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Current Liabilities, Accrued Liabilities Non-current income taxes payable Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Noncurrent Liabilities, Income Taxes Payable Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Noncurrent Liabilities, Income Taxes Payable Deferred tax liabilities Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Deferred Tax Liabilities Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Deferred Tax Liabilities Mobile Platform Business Mobile Platform Business [Member] Mobile Platform Business [Member] Severance Impairment of equipment and technology licenses Asset Impairment Charges [Member] Asset Impairment Charges [Member] Contract termination Contract Termination [Member] Write-off of assets held-for-sale Write-off of Assets Held-for-sale [Member] Write-off of Assets Held-for-sale [Member] Singapore SINGAPORE Restructuring and other related charges Restructuring Costs and Asset Impairment Charges Cumulative costs incurred Restructuring and Related Cost, Cost Incurred to Date Gain or loss recognized upon sale of equipment held for sale Gain (Loss) on Disposition of Property Plant Equipment Segment Reporting [Abstract] Long-Lived Asset Information Based on Geographic Region Long-lived Assets by Geographic Areas [Table Text Block] Numerator: Net Income (Loss) Attributable to Parent [Abstract] Income (loss) from continuing operations, net of tax Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent Income (loss) from discontinued operations, net of tax Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent Net income (loss) Net Income (Loss) Attributable to Parent Denominator: Weighted Average Number of Shares Outstanding, Basic [Abstract] Weighted average shares — basic (in shares) Weighted Average Number of Shares Outstanding, Basic Effect of dilutive securities: Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Share-based awards (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Weighted average shares — diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Income (loss) from continuing operations per share: Earnings Per Share, Basic and Diluted, Other Disclosures [Abstract] Basic (in usd per share) Income (Loss) from Continuing Operations, Per Basic Share Diluted (in usd per share) Income (Loss) from Continuing Operations, Per Diluted Share Income (loss) from discontinued operations per share: Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic and Diluted Share [Abstract] Basic (in usd per share) Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Basic Share Diluted (in usd per share) Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Diluted Share Net income (loss) per share: Earnings Per Share, Basic and Diluted [Abstract] Net Income (loss) per share - Basic (in usd per share) Earnings Per Share, Basic Net Income (loss) per share - diluted (in usd per share) Earnings Per Share, Diluted Discontinued Operations and Disposal Groups [Abstract] Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] Disposal Group Classification [Axis] Disposal Group Classification [Axis] Disposal Group Classification [Domain] Disposal Group Classification [Domain] Discontinued Operations, Disposed of by Sale Discontinued Operations, Disposed of by Sale [Member] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Net revenue Disposal Group, Including Discontinued Operation, Revenue Cost of goods sold Disposal Group, Including Discontinued Operation, Costs of Goods Sold Gross Profit Disposal Group, Including Discontinued Operation, Gross Profit (Loss) Operating expenses: Disposal Group, Including Discontinued Operation, Costs and Expenses [Abstract] Disposal Group, Including Discontinued Operation, Costs and Expenses [Abstract] Research and development Disposal Group, Including Discontinued Operation, Research and Development Disposal Group, Including Discontinued Operation, Research and Development Selling, general and administrative Disposal Group, Including Discontinued Operation, Selling, General and Administrative Expense Disposal Group, Including Discontinued Operation, Selling, General and Administrative Expense Total operating expenses Disposal Group, Including Discontinued Operation, Operating Expense Income (loss) from discontinued operations before income taxes Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, before Income Tax Gain from sale of discontinued operations Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax Provision for income taxes Discontinued Operation, Tax Effect of Discontinued Operation Net income (loss) from discontinued operations Non-current deferred tax assets Non-current deferred tax liabilities Deferred Income Tax Liabilities, Net Net deferred tax assets (liabilities) Deferred Tax Liabilities, Net Basis of Presentation Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] the ESPP Employee Stock Purchase Plan, 2000 Restated Plan [Member] Employee Stock Purchase Plan, 2000 Restated Plan [Member] Maximum subscription rate Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Rate Look-back period Share based Compensation Arrangement by Share based Payment Award, Award Look-back Period Share based Compensation Arrangement by Share based Payment Award, Award Look-back Period Percentage discount of purchase price per share of common shares Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Purchase Date Offering period Share Based Compensation Arrangement By Share Based Payment Award Duration Of Offering Period Share Based Compensation Arrangement By Share Based Payment Award Duration Of Offering Period Purchase period Share based Compensation Arrangement by Share based Payment Award, Purchase Period Share based Compensation Arrangement by Share based Payment Award, Purchase Period Number of shares issued Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period Weighted-average price (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Per Share Weighted Average Price of Shares Purchased Number of shares available for future issuance Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Major Classes of Assets and Liabilities and Results of Operations of Discontinued Operations Disposal Groups, Including Discontinued Operations [Table Text Block] Product and Service [Axis] Product and Service [Axis] Product and Service [Domain] Product and Service [Domain] Storage Storage Product Group [Member] Storage Product Group [Member] Networking Networking Product Group [Member] Networking Product Group [Member] Other Other Product Group [Member] Other Product Group [Member] Product Concentration Risk Product Concentration Risk [Member] Restricted Stock Restricted Stock [Member] Number of shares withheld Shares Paid for Tax Withholding for Share Based Compensation Tax withholdings related to net share settlement of restricted stock units Adjustments Related to Tax Withholding for Share-based Compensation Time-Based Options Market-Based Options Market Based Option Award [Member] Market Based Option Award [Member] Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Balance at beginning of period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Assumed Upon Acquisition (in shares) Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Assumed In Acquisition, Number Of Shares Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Assumed In Acquisition, Number Of Shares Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Canceled/Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Balance at end of period (in shares) Vested or expected to vest at end of period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Balance at beginning of period (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Assumed Upon Acquisition (in usd per share) Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Assumed In Acquisition, Weighted Average Exercise Price Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Assumed In Acquisition, Weighted Average Exercise Price Granted (in usd per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Exercised (in usd per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Canceled/Forfeited (in usd per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Balance at end of period (in usd per share) Vested or expected to vest at end of period (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price Total Shareholder Return Awards Total Shareholder Return [Member] Total Shareholder Return [Member] Average correlation coefficient of peer companies Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Weighted Average Index Correlation Rate Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Weighted Average Index Correlation Rate Cavium 2016 EIP Cavium 2016 EIP [Member] Cavium 2016 EIP [Member] Award vesting period Award expiration period Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Machinery and equipment Machinery and Equipment [Member] Computer software Software and Software Development Costs [Member] Furniture and fixtures Furniture and Fixtures [Member] Building Building [Member] Building improvements Building Improvements [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Property and equipment, estimated useful lives Property, Plant and Equipment, Useful Life Debt Debt Disclosure [Text Block] Statement of Financial Position [Abstract] ASSETS Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Short-term investments Short-term Investments Accounts receivable, net Accounts Receivable, Net, Current Inventories Inventory, Net Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Assets held for sale Discontinued Operation, Assets, Current Discontinued Operation, Assets, Current Total current assets Assets, Current Property and equipment, net Property, Plant and Equipment, Net Acquired intangible assets, net Other non-current assets Total assets Assets LIABILITIES AND SHAREHOLDERS’ EQUITY Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Accounts payable Accounts Payable, Current Accrued liabilities Accrued And Contract Liabilities, Current Accrued And Contract Liabilities, Current Accrued employee compensation Employee-related Liabilities, Current Deferred income Deferred Income, Current, Net Of Costs Deferred Income, Current, Net Of Costs Total current liabilities Liabilities, Current Long-term debt Long-term Debt, Excluding Current Maturities Non-current income taxes payable Accrued Income Taxes, Noncurrent Deferred tax liabilities Other non-current liabilities Total liabilities Liabilities Commitments and contingencies (Note 13) Commitments and Contingencies Shareholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Preferred stock, $0.002 par value; 8,000 shares authorized; no shares issued and outstanding Preferred Stock, Value, Issued Common stock, $0.002 par value; 992,000 shares authorized; 658,514 and 495,913 shares issued and outstanding in fiscal 2019 and 2018, respectively Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital, Common Stock Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Total shareholders’ equity Stockholders' Equity Attributable to Parent Total liabilities and shareholders’ equity Liabilities and Equity Deferred income: Contract with Customer, Liability [Abstract] Deferred revenue Net Deferred Income, Current Net Deferred Income, Current Deferred cost of goods sold Deferred Costs, Current Deferred income Cavium 2007 EIP Cavium 2007 EIP [Member] Cavium 2007 EIP [Member] Stock Options Employee Stock Option [Member] Total Vesting [Axis] Vesting [Axis] Vesting [Domain] Vesting [Domain] Tranche One Share-based Compensation Award, Tranche One [Member] Tranche Two Share-based Compensation Award, Tranche Two [Member] Vesting percentage Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Information about Gains (Losses) Associated with Derivative Financial Instruments Derivative Instruments, Gain (Loss) [Table Text Block] Gains (Losses) Reclassified from Accumulated Other Comprehensive Income (Loss) Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock Common Stock [Member] Additional Paid-in Capital Additional Paid-in Capital [Member] Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Retained Earnings Retained Earnings [Member] Statement [Line Items] Statement [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Balance (in shares) Shares, Outstanding Balance at beginning of period Issuance of ordinary shares in connection with equity incentive plans (in shares) Stock Issued During Period, Shares, New Issues Issuance of ordinary shares in connection with equity incentive plans Stock Issued During Period, Value, New Issues Tax withholdings related to net share settlement of restricted stock units Share-based compensation Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Tax benefit from employee stock transactions Adjustment to Additional Paid in Capital, Income Tax Effect from Share-based Compensation, Net Common stock issued to Cavium common stockholders (in shares) Stock Issued During Period, Shares, Acquisitions Common stock issued to Cavium common stockholders Stock Issued During Period, Value, Acquisitions Stock consideration for Cavium accelerated awards (in shares) Stock Issued During Period, Shares, Share-based Compensation, Gross Stock consideration for Cavium accelerated awards Stock Issued During Period, Value, Share-based Compensation, Gross Equity related issuance cost Replacement equity awards attributable to pre-acquisition service Adjustments To Additional Paid In Capital, Replacement Equity Awards Attributable To Pre-Acquisition Service Adjustments To Additional Paid In Capital, Replacement Equity Awards Attributable To Pre-Acquisition Service Repurchase of common stock (in shares) Repurchase of common stock Cash dividends declared and paid (cumulatively $0.24 per share) Dividends, Common Stock, Cash Cumulative effect of accounting change Cumulative Effect of New Accounting Principle in Period of Adoption Net income (loss) Other comprehensive gain (loss) Other Comprehensive Income (Loss), Net of Tax Balance (in shares) Balance at end of period Options vested and expected to vest, aggregate intrinsic value Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value Options exercisable, aggregate intrinsic value Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Aggregate intrinsic value of stock options exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Unamortized compensation expense for stock options Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options Sales returns Allowance for Sales Returns Allowance for Sales Returns Doubtful accounts Allowance for Doubtful Accounts Receivable Provision for sales returns and allowances Allowance For Doubtful Accounts Receivable And Sales Returns Current Allowance For Doubtful Accounts Receivable And Sales Returns Current Defined Contribution Plan [Table] Defined Contribution Plan [Table] Retirement Plan Sponsor Location [Domain] Retirement Plan Sponsor Location [Domain] Non-U.S. Defined Contribution Plan Foreign Plan [Member] Defined Contribution Plan Tranches [Axis] Defined Contribution Plan Tranches [Axis] Defined Contribution Plan Tranches [Axis] Defined Contribution Plan Tranches [Domain] Defined Contribution Plan Tranches [Domain] [Domain] for Defined Contribution Plan Tranches [Axis] Defined Contribution Plan, Tranche One Defined Contribution Plan, Tranche One [Member] Defined Contribution Plan, Tranche One [Member] Defined Contribution Plan, Tranche Two Defined Contribution Plan, Tranche Two [Member] Defined Contribution Plan, Tranche Two [Member] Defined Contribution Plan Disclosure [Line Items] Defined Contribution Plan Disclosure [Line Items] Employee pre-tax contributions to 401(k) (as a percent) Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent Employer match contributions percentage Defined Contribution Plan, Employer Matching Contribution, Percent of Match Maximum contribution per employee Defined Contribution Plan, Maximum Annual Contributions Per Employee, Amount Matching contributions to employees Defined Contribution Plan, Employer Discretionary Contribution Amount U.S. operations Income (Loss) from Continuing Operations before Income Taxes, Domestic Non-U.S. operations Income (Loss) from Continuing Operations before Income Taxes, Foreign Income before income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Supplemental cash flow information: Supplemental Cash Flow Information [Abstract] Cash paid for interest Interest Paid, Excluding Capitalized Interest, Operating Activities Cash paid for income taxes, net Income Taxes Paid, Net Non-Cash Investing and Financing Activities: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Non-cash consideration paid for the acquisition of Cavium Noncash Or Part Noncash Acquisition, Noncash Consideration Paid Noncash Or Part Noncash Acquisition, Noncash Consideration Paid Purchase of software and intellectual property under license obligations Non Cash Obligation For Technology License Non Cash Obligation For Technology License Unsettled trade receivable of available-for-sale securities Transfer from Investments Unsettled trade payable of available-for-sale securities Unsettled Trade Payable of Available-for-sale Securities Unsettled Trade Payable of Available-for-sale Securities Unpaid purchase of property and equipment at end of year Capital Expenditures Incurred but Not yet Paid Unpaid repurchases of our common shares Accrual of Repurchase of Common Shares Accrual of Repurchase of Common Shares Unpaid equity and debt financing costs Equity And Debt Issuance Costs Incurred During Noncash Or Partial Noncash Transaction Equity And Debt Issuance Costs Incurred During Noncash Or Partial Noncash Transaction Income Statement [Abstract] Cost of goods sold Cost of Goods and Services Sold Gross profit Gross Profit Operating expenses: Costs and Expenses [Abstract] Research and development Research and Development Expense Selling, general and administrative Selling and Marketing Expense Litigation settlement Litigation Settlement, Expense Restructuring related charges Restructuring Costs Total operating expenses Costs and Expenses Operating income from continuing operations Operating Income (Loss) Interest income Investment Income, Nonoperating Interest expense Other income, net Other Nonoperating Income (Expense) Interest and other income (loss), net Nonoperating Income (Expense) Provision for income taxes Income Tax Expense (Benefit) Income (loss) from continuing operations, net of tax Net income (loss) per share - Basic: Earnings Per Share, Basic [Abstract] Continuing operations (in usd per share) Discontinued operations (in usd per share) Net income (loss) per share - Diluted: Earnings Per Share, Diluted [Abstract] Continuing operations (in usd per share) Discontinued operations (in usd per share) Weighted average shares: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Basic (in shares) Diluted (in shares) Future Minimum Lease Payments, Net of Estimated Sublease Income under Operating and Capital Leases Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Future Minimum Lease Payments Under Technology License Obligations Contractual Obligation, Fiscal Year Maturity Schedule [Table Text Block] Fair Value, Assets and Liabilities Measured on Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Summary of Change in Fair Values for Level Three Assets Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Basis of Presentation Fiscal Period, Policy [Policy Text Block] Discontinued Operations Discontinued Operations, Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Principles of Consolidation Consolidation, Policy [Policy Text Block] Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Investments Investment, Policy [Policy Text Block] Impairment of Investments Other-Than-Temporary Impairment [Policy Text Block] Other-Than-Temporary Impairment, Policy [Text Block] Derivative Financial Instruments Derivatives, Policy [Policy Text Block] Concentration of Credit Risk and Significant Customers Concentration Risk, Credit Risk, Policy [Policy Text Block] Inventories Inventory, Policy [Policy Text Block] Property and Equipment, Net Property, Plant and Equipment, Policy [Policy Text Block] Goodwill Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block] Long-Lived Assets and Intangible Assets Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block] Foreign Currency Transactions Foreign Currency Transactions and Translations Policy [Policy Text Block] Revenue Recognition Revenue Recognition, Policy [Policy Text Block] Business Combination Business Combinations Policy [Policy Text Block] Advertising Expense Advertising Costs, Policy [Policy Text Block] Share-Based Compensation Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] Comprehensive Income (Loss) Comprehensive Income, Policy [Policy Text Block] Accounting for Income Taxes Income Tax, Policy [Policy Text Block] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Income Taxes Income Tax Disclosure [Text Block] Accrued liabilities: Accrued Liabilities, Current [Abstract] Contract liabilities Contract with Customer, Liability, Current Technology license obligations Contractual Obligation, Current Contractual Obligation, Current Accrued rebates Accrued Rebate, Current Carrying value as of the balance sheet date of obligations incurred through that date and payable for rebates. Accrued income tax payable Accrued Income Taxes, Current Other Other Accrued Liabilities, Current Accrued liabilities Provision at U.S. notional statutory rate Difference in U.S. and non-U.S. tax rates Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent Benefits from utilization of general business credits Effective Income Tax Rate Reconciliation, Tax Credit, Research, Percent Change in valuation allowance Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent Withholding taxes Effective Income Tax Rate Reconciliation, Withholding Taxes, Percent Effective Income Tax Rate Reconciliation, Withholding Taxes, Percent FIN48 Effective Income Tax Rate Reconciliation, Tax Contingency, Percent Tax effects of global restructuring Effective Income Tax Rate Reconciliation, Nondeductible Expense, Restructuring Charges, Percent R&D Credit - Previously Reserved Tax Benefit Used Effective Income Tax Rate Reconciliation, Nondeductible Expense, Research and Development, Percent State Taxes, net of federal benefit Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent Foreign Income Inclusion in US Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Percent Other Effective Income Tax Rate Reconciliation,Other Reconciling Items, Percent Effective tax rate Effective Income Tax Rate Reconciliation, Percent Preferred stock, par value (in usd per share) Preferred Stock, Par or Stated Value Per Share Preferred stock, shares authorized Preferred Stock, Shares Authorized Preferred stock, shares issued Preferred Stock, Shares Issued Preferred stock, shares outstanding Preferred Stock, Shares Outstanding Common stock, par value (in usd per share) Common Stock, Par or Stated Value Per Share Common stock, shares authorized Common Stock, Shares Authorized Common stock, shares issued Common Stock, Shares, Issued Common stock, shares outstanding Common Stock, Shares, Outstanding Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Table] Hedging Relationship [Axis] Hedging Relationship [Axis] Hedging Relationship [Domain] Hedging Relationship [Domain] Cash flow hedges Cash Flow Hedging [Member] Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract [Domain] Derivative Contract [Domain] Foreign currency forward contracts Foreign Exchange Forward [Member] Research and development Research and Development Expense [Member] Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Amount of Gains (Losses) in Statement of Operations Derivative, Gain (Loss) on Derivative, Net Goodwill and Acquired Intangible Assets, Net Goodwill and Intangible Assets Disclosure [Text Block] Document And Entity Information [Abstract] Document And Entity Information [Abstract] Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Trading Symbol Trading Symbol Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Entity Current Reporting Status Entity Current Reporting Status Entity Voluntary Filers Entity Voluntary Filers Entity File Category Entity Filer Category Entity Small Business Entity Small Business Entity Emerging Growth Company Entity Emerging Growth Company Entity Shell Company Entity Shell Company Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Entity Public Float Entity Public Float Summary of Effect of Adoption of New Revenue Standard Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block] Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Significant Accounting Policies Significant Accounting Policies [Text Block] Schedule of Revenues from External Customers and Long-Lived Assets [Table] Schedule of Revenues from External Customers and Long-Lived Assets [Table] Israel ISRAEL India INDIA Cayman CAYMAN ISLANDS Others Revenues from External Customers and Long-Lived Assets [Line Items] Revenues from External Customers and Long-Lived Assets [Line Items] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of accumulated other comprehensive income (loss) Reclassification out of Accumulated Other Comprehensive Income [Member] Cash flow hedges Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] Research and development Selling, general and administrative Selling, General and Administrative Expense Total Operating Costs and Expenses 2020 Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months 2021 Finite-Lived Intangible Assets, Amortization Expense, Year Two 2022 Finite-Lived Intangible Assets, Amortization Expense, Year Three 2023 Finite-Lived Intangible Assets, Amortization Expense, Year Four 2024 Finite-Lived Intangible Assets, Amortization Expense, Year Five Thereafter Finite-Lived Intangible Assets, Amortization Expense, after Year Five Summary of Total Merger Consideration Schedule of Business Acquisitions, by Acquisition [Table Text Block] Purchase Price Allocation Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Supplemental Pro Forma Financial Information Business Acquisition, Pro Forma Information [Table Text Block] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Discontinued operations Cost of goods sold Cost of Sales [Member] Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] Total share-based compensation Number of reportable segments Number of Reportable Segments Goodwill impairment Goodwill, Impairment Loss Goodwill acquired Goodwill, Acquired During Period Divestiture of goodwill Goodwill, Written off Related to Sale of Business Unit Indefinite-lived Intangible Assets [Axis] Indefinite-lived Intangible Assets [Axis] Indefinite-lived Intangible Assets, Major Class Name [Domain] Indefinite-lived Intangible Assets, Major Class Name [Domain] IPR&D In Process Research and Development [Member] Intangibles acquired Finite-lived Intangible Assets Acquired Amortization of acquired intangible assets Amortization and Impairment of Intangible Assets Amortization and Impairment of Intangible Assets Inventories: Inventory, Net [Abstract] Work-in-process Inventory, Work in Process, Net of Reserves Finished goods Inventory, Finished Goods, Net of Reserves Inventories Inventory held at third-party logistics providers Other Inventory, Inventory at off Site Premises, Gross Schedule of Net Revenue Attributable to Significant Customers Schedules of Concentration of Risk, by Risk Factor [Table Text Block] Cavium Plans Cavium Plans [Member] Cavium Plans [Member] Fair value of awards assumed in acquisition Share-Based Compensation Arrangement By Share-Based Payment Award, Fair Value Of Awards Assumed In Acquisition Share-Based Compensation Arrangement By Share-Based Payment Award, Fair Value Of Awards Assumed In Acquisition Share-based compensation expense to be recognized Schedule of US and non US Components of Income Before Income Tax Expense (Benefit) Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] Schedule of Provision (Benefit) for Income Taxes Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Schedule of Deferred Tax Assets and Liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Reconciliation Between the Provision (Benefit) for Income Taxes at the Statutory Rate and the Effective Tax Rate Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Unrecognized Tax Benefits Reconciliation Schedule of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns Roll Forward [Table Text Block] Concentration Risk [Table] Concentration Risk [Table] Net Revenue Customer Concentration Risk Customer Concentration Risk [Member] Customer [Axis] Customer [Axis] Customer [Domain] Customer [Domain] Western Digital Western Digital [Member] Western Digital [Member] Toshiba Toshiba [Member] Toshiba [Member] Seagate Seagate [Member] Seagate [Member] Wintech Wintech [Member] Wintech [Member] Concentration Risk [Line Items] Concentration Risk [Line Items] Concentration of risk percentage Schedule of Repurchases Schedule of Repurchase Agreements [Table Text Block] Current income tax provision (benefit): Current Income Tax Expense (Benefit), Continuing Operations [Abstract] Federal Current Federal Tax Expense (Benefit) State Current State and Local Tax Expense (Benefit) Foreign Current Foreign Tax Expense (Benefit) Total current income tax provision (benefit) Current Income Tax Expense (Benefit) Deferred income tax provision (benefit): Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract] Federal Deferred Federal Income Tax Expense (Benefit) State Deferred State and Local Income Tax Expense (Benefit) Foreign Deferred Foreign Income Tax Expense (Benefit) Total deferred income tax provision (benefit) Deferred Income Tax Expense (Benefit) Total provision (benefit) for income taxes Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] Schedule of Nonvested Share Activity Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block] Schedule of Stock Option Activity Share-based Compensation, Stock Options, Activity [Table Text Block] Schedule of Outstanding Options and Exercisable Options Information, by Range of Exercise Prices Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block] Weighted Average Assumptions Used to Calculate Fair Value Awards Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Table] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Table] SEC Schedule, 12-09, Valuation Allowances and Reserves Type [Axis] SEC Schedule, 12-09, Valuation Allowances and Reserves 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and other assets Increase (Decrease) in Prepaid Expense and Other Assets Accounts payable Increase (Decrease) in Accounts Payable Accrued liabilities and other non-current liabilities Increase (Decrease) in Accrued Liabilities Carnegie Mellon University accrued litigation settlement Increase Decrease Litigation Liabilities Increase Decrease Litigation Liabilities Accrued employee compensation Increase (Decrease) in Employee Related Liabilities Deferred income Increase (Decrease) in Contract with Customer, Liability Net cash provided by (used in) operating activities Net Cash Provided by (Used in) Operating Activities Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Purchases of available-for-sale securities Payments to Acquire Debt Securities, Available-for-sale Sales of available-for-sale securities Proceeds from Sale of Debt Securities, Available-for-sale Maturities of available-for-sale securities Proceeds from Maturities, 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Net cash provided by (used in) investing activities Net Cash Provided by (Used in) Investing Activities Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Repurchases of common stock Payments for Repurchase of Common Stock Proceeds from employee stock plans Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Excluding Stock Options Tax withholding paid on behalf of employees for net share settlement Payments Related to Tax Withholding for Share-based Compensation Dividend payments to shareholders Payments on technology license obligations Payment on Technology License Obligation Payment on Technology License Obligation Excess tax benefits from share-based compensation Excess Tax Benefit from Share-based Compensation, Financing Activities Proceeds from issuance of debt Proceeds from Issuance of Long-term Debt Principal payments of debt Payment of equity and debt financing costs Payment of Financing and 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Range [Axis] Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Domain] Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Domain] $8.23 - $10.47 Range One [Member] Range One [Member] $10.76 - $10.76 Range Two [Member] Range Two [Member] $10.80 - $14.35 Range Three [Member] Range Three [Member] $14.45 - $15.87 Range Four [Member] Range Four [Member] $15.91 - $22.27 Range Five [Member] Range Five [Member] Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] Range of Exercise Prices, Lower Limit (in usd per share) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit Range of Exercise Prices, Upper Limit (in usd per share) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise 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