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current Operating Lease, Liability, Current Canceled/Forfeited (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Weighted Average Assumptions Used to Calculate Fair Value Awards Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Employer match contributions percentage Defined Contribution Plan, Employer Matching Contribution, Percent of Match Fair Value Measurements Fair Value Disclosures [Text Block] Measurement Period Adjustment, Prepaid expenses and other current assets Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Prepaid Expenses And Other Current Assets Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Prepaid Expenses And Other Current Assets Accounts Receivable Accounts Receivable [Member] Measurement Period Adjustment, Acquired intangible assets, net Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles Customer [Domain] Customer [Domain] Cumulative Effect, Period of Adoption, Adjustment Cumulative Effect, Period of Adoption, Adjustment [Member] Basis of Presentation Fiscal Period, Policy [Policy Text Block] Additional paid-in capital Additional Paid in Capital, Common Stock Entity Registrant Name Entity Registrant Name Subsequent Event Type [Domain] Subsequent Event Type [Domain] Business Acquisition [Line Items] Business Acquisition [Line Items] Weighted-average discount rate Operating Lease, Weighted Average Discount Rate, Percent Assets Assets, Fair Value Disclosure [Abstract] Concentration Risk [Line Items] Concentration Risk [Line Items] Cavium Cavium, Inc. 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[Member] Aquantia, Corp. 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Numerator: Net Income (Loss) Attributable to Parent [Abstract] Other income, net: Nonoperating Income (Expense) [Abstract] Level 2 Fair Value, Inputs, Level 2 [Member] Singapore SINGAPORE Termination fee receivable Business Combination, Contingent Obligation, Contract Termination Fee Receivable Business Combination, Contingent Obligation, Contract Termination Fee Receivable Consideration received Disposal Group, Including Discontinued Operation, Consideration Measurement Period Adjustment, 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 Vesting [Axis] Vesting [Axis] Current income tax provision (benefit): Current Income Tax Expense (Benefit), Continuing Operations [Abstract] Subsequent Event [Line Items] Subsequent Event [Line Items] Supplemental Financial Information Additional 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Revolving Credit Facility 2020 [Member] Revolving Credit Facility 2020 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 Document Annual Report Document Annual Report Options exercisable, aggregate intrinsic value Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Schedule of Provision for Sales Returns and Allowances Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Cash consideration - director, employee & consultant grant accelerations and payout for employee stock purchase plan Business Combination, Cash Consideration Transferred, Grant Accelerations And Employee Stock Purchase Plan Business Combination, Cash Consideration Transferred, Grant Accelerations And Employee Stock Purchase Plan Subsequent Event [Table] Subsequent Event [Table] Schedule of 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By Share Based Payment Award Fair Value Assumptions Weighted Average Index Correlation Rate Net change in unrealized gain (loss) on marketable securities OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax Executive Officers Executive Officer [Member] Gross profit Gross Profit Property and equipment, net Property and equipment, net Property, Plant and Equipment, Net Accrued liabilities Accrued liabilities Accrued And Contract Liabilities, Current Accrued And Contract Liabilities, Current Entity Tax Identification Number Entity Tax Identification Number Net income (loss) Net income (loss) Net Income (Loss) Attributable to Parent Changes in assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Fiscal Year Contractual Obligation, Fiscal Year Maturity [Abstract] Pro Forma Pro Forma [Member] LIBOR London Interbank Offered Rate (LIBOR) [Member] Trade names Trade Names [Member] Current Fiscal Year End Date Current Fiscal Year End Date Retirement Plan Sponsor Location [Domain] Retirement Plan Sponsor Location [Domain] Measurement Period Adjustment, Property and equipment, net Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Property, Plant, and Equipment Other income Other Nonoperating Income Server Processor Products Server Processor Products [Member] Server Processor Products Acquired intangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill Warrants to purchase common shares (in shares) Class of Warrant or Right, Number of Securities Called by Warrants or Rights Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Cash and cash equivalents: Cash and Cash Equivalents [Abstract] Developed technologies Developed Technology Rights [Member] Tax credit carryforwards subject to annual limitation Deferred Tax Assets, Tax Credit Carryforwards Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Uncertain tax positions Effective Income Tax Rate Reconciliation, Uncertain Tax Positions Effective Income Tax Rate Reconciliation, Uncertain Tax Positions Supplemental Cash Flow Information: Supplemental Cash Flow Information [Abstract] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Measurement Period Adjustment, Accrued liabilities Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Accrued Liabilities Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Accrued Liabilities Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Aquantia and Avera Aquantia And Avera Acquisitions [Member] Aquantia And Avera Acquisitions Property, Plant and Equipment, Type [Domain] Long-Lived Tangible Asset [Domain] Allowance for doubtful accounts SEC Schedule, 12-09, Allowance, Credit Loss [Member] Recorded Unconditional Purchase Obligation [Line Items] Recorded Unconditional Purchase Obligation [Line Items] Marvell Israel Marvell Israel [Member] Marvell Israel [Member] Schedule of Property and Equipment, Net Property, Plant and Equipment [Table Text Block] $14.45 - $15.87 Range Four [Member] Range Four [Member] Non-cash consideration paid for the acquisition Noncash Or Part Noncash Acquisition, Noncash Consideration Paid Noncash Or Part Noncash Acquisition, Noncash Consideration Paid Issuance of ordinary shares in connection with equity incentive plans (in shares) Stock Issued During Period, Shares, New Issues Gross Carrying Amounts Finite-Lived Intangible Assets, Gross Global Foundries Inc Global Foundries Inc [Member] Global Foundries Inc Money market funds Money Market Funds [Member] Less: Accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment 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 Cost of goods sold and restructuring related charges Cost of goods sold and restructuring related charges Restructuring Costs And Asset Impairment Charges, Including Inventory Write-Down Restructuring Costs And Asset Impairment Charges, Including Inventory Write-Down Maturities of Operating Lease Liabilities Lessee, Operating Lease, Liability, Maturity [Table Text Block] Other Effective Income Tax Rate Reconciliation, Other Adjustments, Amount 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 Basic (in shares) Weighted average shares — basic (in shares) Weighted Average Number of Shares Outstanding, Basic Basis spread on variable rate (as a percent) Debt Instrument, Basis Spread on Variable Rate Risk-free interest rate (as a percent) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Canceled/Forfeited (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Current portion Accrued restructuring Restructuring Reserve, Current Loss Contingencies [Table] Loss Contingencies [Table] Plan Name [Domain] Plan Name [Domain] Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer 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, 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Block] Aggregate Future Contractual Maturities of Debt Schedule of Maturities of Long-term Debt [Table Text Block] Relationship to Entity [Domain] Title of Individual [Domain] Indefinite-lived Intangible Assets, Major Class Name [Domain] Indefinite-lived Intangible Assets, Major Class Name [Domain] 2023 Contractual Obligation, to be Paid, Year Two Local Phone Number Local Phone Number Cash consideration Cash consideration to common stockholders Payments to Acquire Businesses, Gross Supplemental Pro Forma Financial Information Business Acquisition, Pro Forma Information [Table Text Block] Cumulative Effect, Period of Adoption [Domain] Cumulative Effect, Period of Adoption [Domain] Tranche One Share-based Payment Arrangement, Tranche One [Member] Aggregate intrinsic value of stock options exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Range of Exercise Prices, Upper Limit (in dollars per share) Share-based Payment Arrangement, Option, Exercise Price Range, Upper Range Limit Unrealized Gain (Loss) on Cash Flow Hedges Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] Total borrowings Total Long-term Debt, Gross Decreases related to prior year tax positions Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions Beginning balance Ending balance Contract with Customer, Liability Restructuring related impairment charges (gain) Non Cash Restructuring And Related Charges (Income) Non-cash restructuring and other related charges (income) SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Awards that can be earned as a percentage of target Share-Based Compensation Arrangement By Share-Based Payment Award, Earned Awards As A Percentage Of Target Share-Based 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Preferred Stock, Shares Outstanding Significant Accounting Policies Significant Accounting Policies [Text Block] Net cash provided by (used in) investing activities Net Cash Provided by (Used in) Investing Activities Assumed upon acquisition (in dollars per share) Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Assumed In Acquisition, Weighted Average Grant Date Fair Value Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Assumed In Acquisition, Weighted Average Grant Date Fair Value Equity Award [Domain] Award Type [Domain] Summary of Restructuring and Other Related Charges Schedule of Restructuring Reserve by Type of Cost [Table Text Block] Prepaid ship and debit Prepaid Expense, Noncurrent Defined Contribution Plan, Tranche One Defined Contribution Plan, Tranche One [Member] Defined Contribution Plan, Tranche One [Member] Unused commitment fee percentage Line of Credit 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Position [Abstract]