Retirement Benefits [Abstract] Schedule of Defined Benefit Plans Disclosures [Table] Schedule of Defined Benefit Plans Disclosures [Table] Retirement Plan Sponsor Location [Axis] Retirement Plan Sponsor Location [Axis] Retirement Plan Sponsor Location [Domain] Retirement Plan Sponsor Location [Domain] Japan Plan Foreign Plan [Member] Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] Discount rate Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate Rate of compensation increase Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase 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] Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] Employee Stock Employee Stock [Member] ESPP Employee Stock Purchase Plan [Member] Employee Stock Purchase Plan Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Weighted-average expected term (in years) Fair Value Assumptions, Expected Term Risk-free interest rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Stock price volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Dividend yield Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Fair value (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Employee stock plans (in shares) Stock Issued During Period, Shares, Employee Stock Purchase Plans Employee stock plans Stock Issued During Period, Value, Employee Stock Purchase Plan Organization, Consolidation and Presentation of Financial Statements [Abstract] Supplemental Financial Statement Data Supplemental Balance Sheet Disclosures [Text Block] Income Tax Disclosure [Abstract] Operating Loss Carryforwards [Table] Operating Loss Carryforwards [Table] Income Tax Authority [Axis] Income Tax Authority [Axis] Income Tax Authority [Domain] Income Tax Authority [Domain] Federal NOL (Pre 2017 Act Generation) Domestic Tax Authority (Pre 2017 Act Generation) [Member] Domestic Tax Authority (Pre 2017 Act Generation) [Member] Federal NOL (Post 2017 Act Generation) Domestic Tax Authority (Post 2017 Act Generation) [Member] Domestic Tax Authority (Post 2017 Act Generation) [Member] State and Local Jurisdiction State and Local Jurisdiction [Member] Domestic Tax Authority Domestic Tax Authority [Member] Income Tax Authority, Name [Axis] Income Tax Authority, Name [Axis] Income Tax Authority, Name [Domain] Income Tax Authority, Name [Domain] Japan National Tax Agency, Japan [Member] Belgium Administration of the Treasury, Belgium [Member] China State Administration of Taxation, China [Member] Malaysia Malaysia Bank Jurisdiction [Member] Malaysia Bank Jurisdiction [Member] Spain Tax Authority, Spain [Member] Tax Period [Axis] Tax Period [Axis] Tax Period [Domain] Tax Period [Domain] Operating Loss Carryforwards [Line Items] Operating Loss Carryforwards [Line Items] Operating Loss Carryforwards Operating Loss Carryforwards Tax credit carryforward Tax Credit Carryforward, Amount Accounting Policies [Abstract] Organization and Basis of Presentation Organization, Consolidation and Presentation of Financial Statements 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 Accounts receivable, net Accounts Receivable, Net, Current Inventories Inventory, Net Other current assets Other Assets, Current Total current assets Assets, Current Non-current assets: Assets, Noncurrent [Abstract] Property, plant and equipment, net Property, Plant and Equipment, Net Notes receivable and investments in Flash Ventures Notes Receivable And Investments In Related Parties The total amount of investments in joint ventures that are intended to be held for an extended period of time (longer than one operating cycle) and loans due from and receivables due from the joint ventures. Goodwill Goodwill Other intangible assets, net Intangible Assets, Net (Excluding Goodwill) Other non-current assets Other Assets, Noncurrent Total assets Assets LIABILITIES AND SHAREHOLDERS’ EQUITY Liabilities and Equity [Abstract] Liabilities Liabilities [Abstract] Current liabilities: Liabilities, Current [Abstract] Accounts payable Accounts Payable, Current Accounts payable to related parties Accounts Payable, Related Parties, Current Accrued expenses Accrued Liabilities, Current Accrued compensation Employee-related Liabilities, Current Current portion of long-term debt Long-term Debt, Current Maturities Total current liabilities Liabilities, Current Non-current liabilities: Liabilities, Noncurrent [Abstract] Long-term debt Long-term Debt, Excluding Current Maturities Other liabilities Other Liabilities, Noncurrent Total liabilities Liabilities Commitments and contingencies (Notes 6, 9, 13 and 16) Commitments and Contingencies Shareholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Preferred stock, $0.01 par value; authorized — 5 shares; issued and outstanding — none Preferred Stock, Value, Issued Common stock, $0.01 par value; authorized — 450 shares; issued — 312 shares in 2018 and 2017; outstanding — 296 shares in 2018 and 294 shares in 2017 Common Stock Values Dollar value of issued common stock whether issued at par value, no par or stated value. Note: elements for number of common shares, par value and other disclosure concepts are in another section within stockholders' equity. Additional paid-in capital Additional Paid in Capital Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Retained earnings Retained Earnings (Accumulated Deficit) Treasury stock — common shares at cost; 16 shares in 2018 and 18 shares in 2017 Treasury Stock, Value Total shareholders’ equity Stockholders' Equity Attributable to Parent Total liabilities and shareholders’ equity Liabilities and Equity Commitments and Contingencies Disclosure [Abstract] Guarantees [Abstract] Loss Contingencies [Table] Loss Contingencies [Table] Balance Sheet Information [Axis] Balance Sheet Information [Axis] Balance Sheet Information [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Operating lease guarantees Off Balance Sheet Guarantee [Member] Off Balance Sheet Guarantee [Member] Related Party Transaction [Axis] Related Party Transaction [Axis] Related Party Transaction [Domain] Related Party Transaction [Domain] Equity Method Investee Equity Method Investee [Member] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Total guarantee obligations Guarantor Obligations, Maximum Exposure, Undiscounted Commitments, Contingencies and Related Parties Commitments and Contingencies Disclosure [Text Block] Restricted Stock Units And Performance Share Units Restricted Stock Units And Performance Share Units [Member] Restricted Stock Units And Performance Share Units [Member] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] SanDisk SanDisk [Member] SanDisk [Member] Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Outstanding, beginning balance, shares Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Granted, shares Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Assumed, shares Share Based Compensation Arrangement by Share Based Payment Award Equity Instruments Other than Options Assumed in Period Share based compensation arrangement by share based payment award equity instruments other than options assumed in period in a business combination. Vested, shares Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Canceled or expired, shares Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Outstanding, ending balance, shares Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Outstanding, beginning balance, grant date fair value, in dollars per share Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Granted, grant date fair value, in dollars per share Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Assumed, grant date fair value, in dollars per share Share Based Compensation Arrangement by Share Based Payment Award Equity Instruments Other Than Options Assumed in Period Weighted Average Grant Date Fair Value Share based compensation arrangement by share based payment award equity instruments other than options assumed in period in a business combination weighted average grant date fair value. Vested, grant date fair value, in dollars per share Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Canceled or expired, grant date fair value, in dollars per share Share Based Compensation Arrangement By Share Based Payment Awards Equity Instruments Other Than Options Forfeited In Period Weighted Average Grant Date Fair Value Share based compensation arrangement by share based payment awards equity instruments other than options forfeited in period weighted average grant date fair value. Outstanding, ending balance, grant date fair value, in dollars per share Aggregate value of restricted stock awards vested Aggregate Value Of Restricted Stock Awards Vested Aggregate Value Of Restricted Stock Awards Vested Goodwill and Intangible Assets Disclosure [Abstract] Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract] 2019 Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months 2020 Finite-Lived Intangible Assets, Amortization Expense, Year Two 2021 Finite-Lived Intangible Assets, Amortization Expense, Year Three 2022 Finite-Lived Intangible Assets, Amortization Expense, Year Four 2023 Finite-Lived Intangible Assets, Amortization Expense, Year Five Total future amortization expense Finite-Lived Intangible Assets, Net Derivative Instruments and Hedging Activities Disclosure [Abstract] Unrealized gains expected to be reclassified into earnings Foreign Currency Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months Postemployment Benefits [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] Restructuring Plan 2016 Restructuring Plan [Member] The Company initiated a set of actions relating to the Restructuring Plan associated with the integration of substantial portions of its HGST and WD subsidiaries (the “Restructuring Plan”). The Restructuring Plan consists of asset and footprint reduction, product roadmap consolidation and organization rationalization. Restructuring Type [Axis] Restructuring Type [Axis] Type of Restructuring [Domain] Type of Restructuring [Domain] Employee Termination Benefits One-time Termination Benefits [Member] Contract Termination and Other Contract Termination [Member] Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] Restructuring Reserve [Roll Forward] Restructuring Reserve [Roll Forward] Accrual balance, beginning of period Restructuring Reserve Charges Restructuring and Related Cost, Incurred Cost Cash payments Payments for Restructuring Non-cash items and other Restructuring Reserve, Settled without Cash Restructuring reserve, end of period 2019 Purchase Obligation, Due in Next Twelve Months 2020 Purchase Obligation, Due in Second Year 2021 Purchase Obligation, Due in Third Year 2022 Purchase Obligation, Due in Fourth Year 2023 and thereafter Purchase Obligation, Due in Fifth Year Total Purchase Obligation Statement of Cash Flows [Abstract] Cash flows from operating activities Net Cash Provided by (Used in) Operating Activities [Abstract] Net income (loss) Net Income (Loss) Attributable to Parent Adjustments to reconcile net income to net cash provided by operations: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Stock-based compensation Share-based Compensation Deferred income taxes Deferred Income Tax Expense (Benefit) Loss on disposal of assets Gain (Loss) on Disposition of Property Plant Equipment Write-off of issuance costs and amortization of debt discounts Amortization of Debt Issuance Costs and Discounts Cash premium on extinguishment of debt Cash Premium On Extinguishment Of Debt Cash Premium On Extinguishment Of Debt Loss on convertible debt and related instruments Convertible debt activity, net Amount of non-cash economic interest expense associated with the convertible senior notes, the gains and losses on the conversion of the convertible senior notes and call option, and the unrealized gains and losses related to the change in fair value of the exercise option and the call option. Non-cash portion of employee termination, asset impairment and other charges Non Cash Portion Of Employee Termination Benefits And Other Charges Non Cash Portion Of Employee Termination Benefits And Other Charges Other non-cash operating activities, net Other Operating Activities, Cash Flow Statement Changes in: Increase (Decrease) in Operating Capital [Abstract] Accounts receivable, net Increase (Decrease) in Accounts Receivable Inventories Increase (Decrease) in Inventories Accounts payable Increase (Decrease) in Accounts Payable, Trade Accounts payable to related parties Increase (Decrease) in Accounts Payable, Related Parties Accrued expenses Increase (Decrease) in Accrued Liabilities Accrued compensation Increase (Decrease) in Employee Related Liabilities Other assets and liabilities, net Increase (Decrease) in Other Operating Assets and Liabilities, Net Net cash provided by 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 property, plant and equipment Payments to Acquire Property, Plant, and Equipment Proceeds from the sale of property, plant and equipment Proceeds from Sale of Machinery and Equipment Acquisitions, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Purchases of investments Payments to Acquire Investments Proceeds from sale of investments Proceeds from Sale of Available-for-sale Securities Proceeds from maturities of investments Proceeds from Sale of Held-to-maturity Securities Investments in Flash Ventures Payments to Acquire Equity Method Investments Notes receivable issuances to Flash Ventures Payments For Long Term Loans For Related Parties The cash outflow associated with long-term loans for related parties where one party can exercise control or significant influence over another party, including affiliates, owners or officers and their immediate families, pension trusts, and so forth. Notes receivable proceeds from Flash Ventures Proceeds From Long Term Loans For Related Parties The cash inflow associated with long-term loans for related parties where one party can exercise control or significant influence over another party, including affiliates, owners or officers and their immediate families, pension trusts, and so forth. Strategic investments and other, net Payments for (Proceeds from) Other Investing Activities Net cash 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] Issuance of stock under employee stock plans Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Excluding Stock Options Taxes paid on vested stock awards under employee stock plans Taxes Paid On Vested Stock Awards Under Employee Stock Plans Taxes paid on vested stock awards under employee stock plans. Excess tax benefits from employee stock plans Excess Tax Benefit from Share-based Compensation, Financing Activities Proceeds from acquired call option Net Cash Received In Settlement Of (Paid In Advance for) Stock Repurchase Contracts Proceeds from settlements paid in advance for stock repurchase contracts. Settlement of convertible debt Repayments of Convertible Debt Repurchases of common stock Payments for Repurchase of Common Stock Dividends paid to shareholders Payments of Dividends Settlement of debt hedge contracts Payments for (Proceeds from) Hedge, Financing Activities Proceeds from (repayment of) revolving credit facility Proceeds from (Repayments of) Lines of Credit Repayment of debt and premiums Repayments of Long-term Debt Proceeds from debt Proceeds from Issuance of Long-term Debt and Capital Securities, Net Debt issuance costs Payments of Debt Issuance Costs Payment upon settlement of acquired warrants Payments for Repurchase of Warrants Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities Effect of exchange rate changes on cash Effect of Exchange Rate on Cash and Cash Equivalents Net increase (decrease) in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents, beginning of year Cash and cash equivalents, end of year Supplemental disclosure of cash flow information: Supplemental Cash Flow Information [Abstract] Cash paid for income taxes Income Taxes Paid Cash paid for interest Interest Paid Supplemental disclosure of non-cash investing and financing activities: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Common stock issued and equity awards assumed in connection with acquisition Noncash or Part Noncash Acquisition, Noncash Financial or Equity Instrument Consideration, Value The value of shares issued and equity awards assumed in [noncash or part noncash] connection with a business or asset acquired. Noncash is defined as transactions during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. Shares issued in conjunction with settlement of convertible notes Stock Issued During Period, Value, Conversion of Convertible Securities Shares received in conjunction with assumed call options Convertible Note Hedge, Amount The value of stock acquired during the period convertible securities hedge. Condensed Financial Information of Parent Company Only Disclosure [Abstract] Condensed Balance Sheet Statement [Table] Condensed Balance Sheet Statement [Table] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Eliminations Consolidation, Eliminations [Member] Consolidated Entities [Axis] Consolidated Entities [Axis] Consolidated Entities [Domain] Consolidated Entities [Domain] Parent Parent Company [Member] Guarantor Subsidiaries Guarantor Subsidiaries [Member] Non-Guarantor Subsidiaries Non-Guarantor Subsidiaries [Member] Condensed Balance Sheet Statements, Captions [Line Items] Condensed Balance Sheet Statements, Captions [Line Items] Cash and cash equivalents Short-term investments (now grouped into Other current) Available-for-sale Securities, Current Intercompany receivables Due from Affiliate, Current Investments in consolidated subsidiaries Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Loans due from consolidated affiliates Due from Affiliate, Noncurrent Accounts payable to related parties/Flash Ventures Intercompany payables Due to Affiliate, Current Loans due to consolidated affiliates Due to Affiliate, Noncurrent Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Legal Entity of Counterparty, Type [Axis] Legal Entity of Counterparty, Type [Axis] Legal Entity Type of Counterparty [Domain] Legal Entity Type of Counterparty [Domain] Flash Partners Ltd Flash Partners Ltd [Member] Flash Partners Ltd. Flash Alliance Ltd Flash Alliance Ltd [Member] Flash Alliance Ltd. Flash Forward Ltd Flash Forward Ltd [Member] Flash Forward Ltd. Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Notes receivable, related parties Notes Receivable, Related Parties Investments Investments Notes receivable and investments in Flash Ventures Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table] Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table] Retirement Plan Type [Axis] Retirement Plan Type [Axis] Retirement Plan Type [Domain] Retirement Plan Type [Domain] Pension Plan Pension Plan [Member] Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] Benefit obligations, beginning balance Defined Benefit Plan, Benefit Obligation Service cost Defined Benefit Plan, Service Cost Interest cost Defined Benefit Plan, Interest Cost Actuarial loss (gain) Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss) Benefits paid Defined Benefit Plan, Benefit Obligation, Benefits Paid Settlement/Curtailment Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Settlement Non-U.S. currency movement Defined Benefit Plan, Benefit Obligation, Foreign Currency Translation Gain (Loss) Benefit obligations, ending balance Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] Fair value of plan assets, beginning balance Defined Benefit Plan, Fair Value of Plan Assets Actual return on plan assets Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss) Employer contributions Defined Benefit Plan, Plan Assets, Contributions by Employer Benefits paid Defined Benefit Plan, Plan Assets, Benefits Paid Non-U.S. currency movement Defined Benefit Plan, Plan Assets, Foreign Currency Translation Gain (Loss) Fair value of plan assets, ending balance Unfunded status Defined Benefit Plan, Funded (Unfunded) Status of Plan Foreign Manufacturing Facilities Closure of Foreign Manufacturing Facilities [Member] Closure of Foreign Manufacturing Facilities [Member] Business Realignment Activities Business Realignment Activities [Member] Charges to periodically realign the company's operations with anticipated market demand. Restructuring charges Restructuring Charges Stock-based compensation accelerations and adjustments Share-based Compensation Arrangement by Share-based Payment Award Accelerated Compensation Cost Asset impairment: Asset Impairment Charges Total employee termination and other charges, and stock-based compensation accelerations and adjustments Restructuring Costs and Asset Impairment Charges Fair Value Disclosures [Abstract] Cash, Cash Equivalents, and Marketable Securities Cash, Cash Equivalents, and Marketable Securities [Text Block] Financial Assets and Liabilities Measured at Fair Value on Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Related Costs And Fair Values Based On Quoted Market Prices Related Costs And Fair Values Based On Quoted Market Prices [Table Text Block] Comparison and disclosure of financial instruments where the carrying value in the financial statements differs from the fair value. Condensed Cash Flow Statement [Table] Condensed Cash Flow Statement [Table] Condensed Cash Flow Statements, Captions [Line Items] Condensed Cash Flow Statements, Captions [Line Items] Net cash provided by (used in) operating activities Proceeds from the sale of property, plant and equipment Purchases of investments Intercompany loans from (to) consolidated affiliates Intercompany loans to (from) consolidated subsidiaries Intercompany to (from) parent entity to wholly owned consolidated subsidiaries that are settled. Advances from (to) parent and consolidated subsidiaries Investments in and Advances to Affiliates, at Fair Value, Gross Additions Taxes paid on vested stock awards under employee stock plans Dividends paid to shareholders Repayment of debt and premiums Intercompany loan to consolidated affiliates Proceeds from Contributions from Parent Change in investment in consolidated subsidiaries Proceeds from (Payments for) Other Financing Activities Current liabilities Liability, Defined Benefit Plan, Current Non-current liabilities Liability, Defined Benefit Plan, Noncurrent Net amount recognized Liability, Defined Benefit Plan U.S. Federal statutory rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Tax rate differential on international income Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent Tax effect of U.S. non-deductible convertible debt costs Effective income tax reconciliation, convertible debt costs, percent Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to convertible debt costs. Tax effect of U.S. non-deductible acquisition costs Effective income tax reconciliation, acquisition costs, percent Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to acquisition costs. Tax effect of U.S. foreign income inclusion Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Percent Tax effect of U.S. non-deductible stock-based compensation Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Percent Tax effect of U.S. permanent differences Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent State income tax, net of federal tax Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent One-time mandatory deemed repatriation tax Effective Income Tax Rate Reconciliation, Tax Cuts and Jobs Act of 2017, Mandatory Deemed Reparation Tax, Percent Effective Income Tax Rate Reconciliation, Tax Cuts and Jobs Act of 2017, Mandatory Deemed Reparation Tax, Percent Re-measurement of deferred taxes Effective Income Tax Rate Reconciliation, Tax Cuts and Jobs Act of 2017, Change in Tax Rate, Deferred Taxes, Percent Effective Income Tax Rate Reconciliation, Tax Cuts and Jobs Act of 2017, Change in Tax Rate, Deferred Taxes, Percent Change in valuation allowance Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent Unremitted earnings of certain non-U.S. entities Effective Income Tax Rate Reconciliation, Unremitted Earnings of Non-U.S. Entities, Percent Effective Income Tax Rate Reconciliation, Unremitted Earnings of Non-U.S. Entities, Percent Tax related to SanDisk integration Effective Income Tax Rate Reconciliation, Reorganization, Percent Effective Income Tax Rate Reconciliation, Reorganization, Percent Retroactive extension of Federal R&D credit Effective Income Tax Rate Reconciliation, Nondeductible Expense, Research and Development, Percent Income tax credits Effective Income Tax Rate Reconciliation, Tax Credit, Percent Other Effective Income Tax Rate Reconciliation, Other Adjustments, Percent Effective tax rate Effective Income Tax Rate Reconciliation, Percent Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Scenario, Forecast Scenario, Forecast [Member] Restructuring and related cost, expected cost Restructuring and Related Cost, Expected Cost Restructuring reserve Debt Disclosure [Abstract] 2019 Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months 2020 Long-term Debt, Maturities, Repayments of Principal in Year Two 2021 Long-term Debt, Maturities, Repayments of Principal in Year Three 2022 Long-term Debt, Maturities, Repayments of Principal in Year Four 2023 Long-term Debt, Maturities, Repayments of Principal in Year Five 2024 and thereafter Long-term Debt, Maturities, Repayments of Principal after Year Five Total debt maturities Long-term Debt, Gross Issuance costs and debt discounts Debt Instrument, Unamortized Discount (Premium), Net Net carrying value Long-term Debt Carrying Amount of Goodwill Schedule of Goodwill [Table Text Block] Other Intangible Assets Schedule of Finite-Lived Intangible Assets [Table Text Block] Finite-lived Intangible Assets Amortization Expense Finite-lived Intangible Assets Amortization Expense [Table Text Block] Finite-Lived Intangible Assets, Future Amortization Expense Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Accounting Changes and Error Corrections [Abstract] Recent Accounting Pronouncements New Accounting Pronouncements and Changes in Accounting Principles [Text Block] Tax Scenario [Axis] Tax Scenario [Axis] Tax Scenario [Axis] Tax Scenario [Domain] Tax Scenario [Domain] [Domain] for Tax Scenario [Axis] Pre-Tax Pre-Tax [Member] Pre-Tax [Member] Post-Tax Post-Tax [Member] Post-Tax [Member] After Amendment After Amendment [Member] After Amendment [Member] Defined contribution plan, maximum annual contributions per employee, percent Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent Defined contribution plan, employer matching contribution, percent of match Defined Contribution Plan, Employer Matching Contribution, Percent of Match Defined contribution plan, employer matching contribution, percent of employees' gross pay Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay Company contributions vest period Company Contributions Vest Period Company Contributions Vest Period Defined contribution plan, employer discretionary contribution amount Defined Contribution Plan, Employer Discretionary Contribution Amount New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements or Change in Accounting Principle [Table] Pro Forma Pro Forma [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] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Retained Earnings Retained Earnings [Member] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Accounting Standards Update 2016-09 Accounting Standards Update 2016-09 [Member] Accounting Standards Update 2014-09 Accounting Standards Update 2014-09 [Member] Cumulative Adjustment Scenario [Axis] Cumulative Adjustment Scenario [Axis] Cumulative Adjustment Scenario [Axis] Cumulative Adjustment Scenario [Domain] Cumulative Adjustment Scenario [Domain] [Domain] for Cumulative Adjustment Scenario [Axis] Windfall Tax Benefit, Unrecognized Windfall Tax Benefit, Unrecognized [Member] Unrecognized Windfall Tax Benefit related to change in accounting estimates. Cumulative Adjustment, Change in Accounting Policy Cumulative Adjustment, Change in Accounting Policy [Member] Cumulative Adjustment, Change in Accounting Policy related to estimating forfeitures and share cancellations. Cumulative Adjustment, Change in Accounting Policy, Tax Impact Cumulative Adjustment, Change in Accounting Policy, Tax Impact [Member] Cumulative Adjustment, Change in Accounting Policy, Tax Impact related to estimating impact change in forfeiture policy. New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Adoption of New Accounting Standards Cumulative Effect of New Accounting Principle in Period of Adoption Excess tax benefit from share-based compensation, operating activities Excess Tax Benefit from Share-based Compensation, Operating Activities Advertising expense Advertising Expense Derivative, notional amount Derivative, Notional Amount Outstanding Awards And Shares Available For Award Outstanding Awards And Shares Available For Award [Member] Outstanding Awards And Shares Available For Award [Member] Stock reserved for issuance Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Revenue by End Market [Abstract] Revenue by End Market [Abstract] Revenue from External Customers by End Markets Revenue from External Customers by End Markets [Table Text Block] Tabular disclosure of revenue from external customers by end market areas attributed to the entity’s end markets from which the entity derives revenue. Revenue from External Customers by Geographic Areas Revenue from External Customers by Geographic Areas [Table Text Block] Schedule of Long-lived Assets by Geographic Areas Long-lived Assets by Geographic Areas [Table Text Block] Options Employee Stock Option [Member] Restricted and performance stock units Restricted Stock Units (RSUs) [Member] Employee stock purchase plan Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Cost of revenue Cost of Sales [Member] Research and development Research and Development Expense [Member] Selling, general and administrative Selling, General and Administrative Expenses [Member] Employee termination, asset impairment, and other charges Restructuring Charges [Member] Expenses on stock-based compensation Allocated Share-based Compensation Expense Tax benefit Employee Service Share-based Compensation, Tax Benefit from Compensation Expense Total Allocated Share-based Compensation Expense, Net of Tax Quarterly Financial Information Disclosure [Abstract] Quarterly Results of Operations Quarterly Financial Information [Text Block] Goodwill and Other Intangible Assets Goodwill and Intangible Assets Disclosure [Text Block] Derivative Instruments and Hedging Activities Derivative Instruments and Hedging Activities Disclosure [Text Block] Separate Financial Information of Guarantor Subsidiaries Condensed Financial Statements [Table Text Block] Revenue from External Customers by Products and Services [Table] Revenue from External Customers by Products and Services [Table] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] United States UNITED STATES China CHINA Hong Kong HONG KONG Rest of Asia Asia [Member] Europe, Middle East and Africa Europe Middle East And Africa [Member] Europe Middle East And Africa [Member] Other Other [Member] Other [Member] Revenue from External Customer [Line Items] Revenue from External Customer [Line Items] Revenue, net Sales Revenue, Goods, Net Debt Debt Disclosure [Text Block] Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Options outstanding, beginning balance, shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Granted, shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures Assumed, shares Share Based Compensation Arrangement By Share Based Payment Award Options Assumed In Period Net number of share options (or share units) assumed during the period in a business combination. Exercised, shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Forfeited or expired, shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period Options outstanding, ending balance, shares Exercisable, period end, shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Weighted Average Exercise Price Per Share Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Options outstanding, beginning balance, exercise price, in dollars per share Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Granted, exercise price, in dollars per share Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Assumed, exercise price, in dollars per share Share Based Compensation Options Assumed Weighted Average Exercise Price The weighted average exercise price of options assumed in a business combination as share based compensation. Exercised, exercise price, in dollars per share Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Forfeited or expired, exercise price, in dollars per share Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price Options outstanding, ending balance, in dollars per share Exercisable, period end, exercise price, in dollars per share Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value [Abstract] Exercised, intrinsic value Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Options outstanding, ending balance, intrinsic value Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Exercisable, period end, intrinsic value Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Options outstanding, weighted average remaining contractual term Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Exercisable, period end, weighted average remaining contractual life Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Inventories Schedule of Inventory, Current [Table Text Block] Property, Plant and Equipment Property, Plant and Equipment [Table Text Block] Schedule of Product Warranty Liability Schedule of Product Warranty Liability [Table Text Block] Schedule of Other Noncurrent Liabilities Other Noncurrent Liabilities [Table Text Block] Schedule of Accumulated Other Comprehensive Income (Loss) Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Reclassification out of Accumulated Other Comprehensive Income Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Employee Service Share-based Compensation, Unrecognized Service Costs [Table] Employee Service Share-based Compensation, Unrecognized Service Costs [Table] Schedule of employee share-based awards, unrecognized compensation in tabular format. RSUs and PSUs Employee Service Share-based Compensation, Unrecognized Service Costs [Line Items] Employee Service Share-based Compensation, Unrecognized Service Costs [Line Items] [Line Items] for Schedule of employee share-based awards, unrecognized compensation in tabular format. Unamortized Compensation Costs Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Remaining Periods to Recognize Stock-based Compensation Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Schedule of Guarantor Obligations [Table] Schedule of Guarantor Obligations [Table] Notes receivable Notes Receivable [Member] Equity investments Equity Method Investments [Member] Inventory and prepayments Prepaid Expenses and Other Current Assets [Member] Guarantor Obligations [Line Items] Guarantor Obligations [Line Items] VIE, reporting entity involvement, maximum loss exposure, amount Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount Operating lease guarantees Inventory and prepayments Inventory, Gross Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract [Domain] Derivative Contract [Domain] Interest rate swap contract Interest Rate Swap [Member] Hedging Relationship [Axis] Hedging Relationship [Axis] Hedging Relationship [Domain] Hedging Relationship [Domain] Cash Flow Hedging Cash Flow Hedging [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Revolving credit facility maturing 2023 Revolving Credit Facility [Member] Debt Instrument, Redemption, Period [Axis] Debt Instrument, Redemption, Period [Axis] Debt Instrument, Redemption, Period [Domain] Debt Instrument, Redemption, Period [Domain] Debt Instrument, Redemption, Period One Debt Instrument, Redemption, Period One [Member] Debt Instrument, Redemption, Period Two Debt Instrument, Redemption, Period Two [Member] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] London Interbank Offered Rate (LIBOR) London Interbank Offered Rate (LIBOR) [Member] Base Rate Base Rate [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Convertible Debt Convertible Debt [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Variable interest rate Term Loan A maturing 2021 Term Loan A [Member] Term Loan A [Member] 4.750% senior unsecured notes due 2026 Four Point Seventy Five Percent Senior Unsecured Notes Due Two Thousand Twenty Six [Member] Four Point Seventy Five Percent Senior Unsecured Notes Due Two Thousand Twenty Six [Member] 7.375% senior secured notes due 2023 Secured Notes [Member] Secured Notes [Member] 10.50% senior unsecured notes due 2024 Unsecured Notes [Member] Unsecured Notes [Member] 1.50% convertible notes due 2024 One Point Fifty Percent Senior Convertible Notes Due Two Thousand Twenty Four [Member] One Point Fifty Percent Senior Convertible Notes Due Two Thousand Twenty Four [Member] Variable interest rate U.S. Term Loan B-3 maturing 2023 U.S. Term Loan B-3 [Member] U.S. Term Loan B-3 [Member] Variable interest rate Term Loan A-1 maturing 2023 Term Loan A-1 [Member] Term Loan A-1 [Member] Make Whole Premiums Make Whole Premiums [Member] Make Whole Premiums [Member] Variable interest rate U.S. Term Loan B-4 maturing 2023 U.S. Term Loan B-4 [Member] U.S. Term Loan B-4 [Member] 0.50% convertible senior notes due 2020 Convertible Senior Notes Due Two Thousand Twenty Member [Member] 0.5% Sr. Convertible Notes due 2020 [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Line of credit facility, maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Repayments of debt Debt instrument, LIBOR floor Debt Instrument, Basis Spread on Variable Rate, Floor Debt Instrument, Basis Spread on Variable Rate, Floor Basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Debt instrument, interest rate, effective percentage Debt Instrument, Interest Rate, Effective Percentage Required quarterly principal payment percent Debt Instrument, Required Quarterly Principal Payment Percent The required quarterly principal payment percentage on the principal amount of the debt Debt issuance costs, net Debt Issuance Costs, Net Monthly fixed interest rate Derivative, Fixed Interest Rate Proceeds from (repayment of) revolving credit facility Proceeds from Lines of Credit Line of credit facility, unused capacity, commitment fee percentage Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Line of credit facility, current borrowing capacity Line of Credit Facility, Current Borrowing Capacity Debt instrument, face amount Debt Instrument, Face Amount Debt instrument, convertible, conversion ratio Debt Instrument, Convertible, Conversion Ratio Debt instrument, interest rate (percentage) Debt Instrument, Interest Rate, Stated Percentage Long-term debt, gross Conversion of stock, shares converted Conversion of Stock, Shares Converted Conversion of stock, cash acquired Conversion of Stock, Cash Acquired Conversion of Stock, Cash Acquired Debt instrument, convertible, conversion price (in dollar per share) Debt Instrument, Convertible, Conversion Price Fair value inputs, discount rate (percentage) Fair Value Inputs, Discount Rate Debt instrument, convertible, carrying amount of equity component Debt Instrument, Convertible, Carrying Amount of Equity Component Debt issuance costs, noncurrent Debt Issuance Costs, Noncurrent, Net Excess capital Excess Capital Issuance costs and debt discounts Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net Cash premium on extinguishment of debt Gain (loss) on extinguishment of debt Gain (Loss) on Extinguishment of Debt Current: Current Income Tax Expense (Benefit), Continuing Operations [Abstract] Foreign Current Foreign Tax Expense (Benefit) Domestic - Federal Current Federal Tax Expense (Benefit) Domestic - State Current State and Local Tax Expense (Benefit) Current income tax expense (benefit) Current Income Tax Expense (Benefit) Deferred: Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract] Foreign Deferred Foreign Income Tax Expense (Benefit) Domestic - Federal Deferred Federal Income Tax Expense (Benefit) Domestic - State Deferred State and Local Income Tax Expense (Benefit) Deferred income tax expense (benefit) Income tax expense (benefit) Income Tax Expense (Benefit) Condensed Balance Sheet Condensed Balance Sheet [Table Text Block] Condensed Income Statement Condensed Income Statement [Table Text Block] Condensed Statement of Comprehensive Income Condensed Statement of Comprehensive Income [Table Text Block] Condensed Cash Flow Statement Condensed Cash Flow Statement [Table Text Block] Schedule of Revenue by Major Customers, by Reporting Segments [Table] Schedule of Revenue by Major Customers, by Reporting Segments [Table] End Markets [Axis] End Markets [Axis] Revenues attributed to the entity’s end markets from which the entity derives revenue. End Markets [Domain] End Markets [Domain] [Domain] for Revenues attributed to the entity’s end markets from which the entity derives revenue. Client Devices Client Devices [Member] Client Devices [Member] Data Center Devices & Solutions Data Center Devices & Solutions [Member] Data Center Devices & Solutions [Member] Client Solutions Client Solutions [Member] Client Solutions [Member] Revenue, Major Customer [Line Items] Revenue, Major Customer [Line Items] Variable interest rate U.S. Term Loan B-2 maturing 2023 U.S. Term Loan B-2 [Member] U.S. Term Loan B-2 Variable interest rate Euro Term Loan B-2 maturing 2023 Euro Term Loan B-2 [Member] Euro Term Loan B-2 Issuance costs and debt discounts Current portion of long-term debt Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Loss contingency, claims dismissed, number Loss Contingency, Claims Dismissed, Number Number of plaintiffs Loss Contingency, Number of Plaintiffs New claims filed, number Loss Contingency, New Claims Filed, Number Loss contingency, pending claims, number Loss Contingency, Pending Claims, Number Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] 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] In-process research and development In Process Research and Development [Member] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Business combination, consideration transferred Business Combination, Consideration Transferred Goodwill recorded in connection with acquisitions Goodwill, Acquired During Period Proceeds on previously outstanding notes receivable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents In-process research and development reclassified to developed product technology Finite-Lived Intangible Assets, Transferred In From (Out To) Indefinite-Lived Intangible Assets Finite-Lived Intangible Assets, Transferred In From (Out To) Indefinite-Lived Intangible Assets Useful life Finite-Lived Intangible Asset, Useful Life Impairment charges related to intangible assets Impairment of Intangible Assets, Finite-lived Document And Entity Information [Abstract] Document and Entity Information [Abstract] 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 Filer Category Entity Filer Category Document Type Document Type Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Amendment Flag Amendment Flag Entity Common Stock, Shares Outstanding (in shares) Entity Common Stock, Shares Outstanding Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Voluntary Filers Entity Current Reporting Status Entity Current Reporting Status Entity Public Float Entity Public Float Text Block [Abstract] 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] Buildings Building [Member] Machinery and equipment Machinery and Equipment [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Property, plant and equipment, useful life Property, Plant and Equipment, Useful Life 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 benefit, beginning balance Unrecognized Tax Benefits Gross increases related to current year tax positions Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Gross increases related to prior year tax positions Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions Gross decreases related to prior year tax positions Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions Settlements Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities Lapse of statute of limitations Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations Acquisitions Unrecognized Tax Benefits, Increase Resulting from Acquisition Unrecognized tax benefit, ending balance Western Digital Corporation 401(k) Plan Defined Contribution Plan Disclosures [Table Text Block] Related Party [Axis] Related Party [Axis] Related Party [Domain] Related Party [Domain] Guarantor Obligations, Nature [Axis] Guarantor Obligations, Nature [Axis] Guarantor Obligations, Nature [Domain] Guarantor Obligations, Nature [Domain] Payment of Principal Amortization Payment of Principal Amortization [Member] Payment of principal amortization. Purchase Option Exercise Price at Final Lease Terms Purchase Option Exercise Price [Member] Purchase Option Exercise Price at Final Lease Terms. 2019 Guarantee Obligations Maximum Exposure Year One Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions due within the first year after the balance sheet date. 2020 Guarantee Obligations Maximum Exposure Year Two Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions due within the second year after the balance sheet date. 2021 Guarantee Obligations Maximum Exposure Year Three Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions due within the third year after the balance sheet date. 2022 Guarantee Obligations Maximum Exposure Year Four Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions due within the fourth year after the balance sheet date. 2023 Guarantee Obligations Maximum Exposure Year Five Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions due within the fifth year after the balance sheet date. Thereafter Guarantee Obligations Maximum Exposure Thereafter Guarantee Obligations Maximum Exposure Thereafter Total guarantee obligations Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Level 2 Fair Value, Inputs, Level 2 [Member] Measurement Basis [Axis] Measurement Basis [Axis] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Portion at Fair Value Measurement [Member] Portion at Fair Value Measurement [Member] Carrying Value Reported Value Measurement [Member] Fair Value Estimate of Fair Value Measurement [Member] Long-term debt Long-term Debt, Fair Value Pensions and Other Post-retirement Benefit Plans Pension and Other Postretirement Benefits Disclosure [Text Block] Schedule of Restructuring Reserve by Type of Cost Schedule of Restructuring Reserve by Type of Cost [Table Text Block] Condensed Statement of Comprehensive Income [Table] Condensed Statement of Comprehensive Income [Table] Condensed Statement of Income Captions [Line Items] Condensed Statement of Income Captions [Line Items] Actuarial pension gain (loss) Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax Foreign currency translation adjustment Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax Net unrealized gain (loss) on derivative contracts Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax Total other comprehensive income (loss), before tax Other Comprehensive Income (Loss), before Tax Income tax benefit (expense) related to items of other comprehensive income (loss), before tax Other Comprehensive Income (Loss), Tax Other comprehensive income (loss), net of tax Other Comprehensive Income (Loss), Net of Tax Total comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Domestic and Foreign Components of Income Before Income Taxes Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] Components of Provision for Income Taxes Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Deferred Tax Assets and Liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] U.S. Federal Statutory Rate to Company's Effective Tax Rate Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Summary of Operating Loss Carryforwards Summary of Operating Loss Carryforwards [Table Text Block] Total Amounts of Unrecognized Tax Benefits Summary of Income Tax Contingencies [Table Text Block] Gross profit Gross Profit Operating income (loss) Operating Income (Loss) Net income (loss) Basic (in dollars per share) Earnings Per Share, Basic Diluted (in dollars per share) Earnings Per Share, Diluted Supplemental Financial Information [Table] Supplemental Financial Information [Table] Supplemental Financial Information [Table] Land and buildings Land and Building [Member] Computer equipment and software Computer Equipment and Software [Member] Capitalized computer equipment and software purchases. Furniture and fixtures Furniture and Fixtures [Member] Leasehold improvements Leasehold Improvements [Member] Construction-in-process Construction in Progress [Member] Supplemental Financial Information [Line Items] Supplemental Financial Information [Line Items] Supplemental Financial Information [Line Items] Property, plant and equipment: Property, Plant and Equipment, Net [Abstract] Total property, plant and equipment Property, Plant and Equipment, Gross Accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Property, plant, and equipment, net Transfers of Assets from level 1 to level 2 Fair Value, Assets, Level 1 to Level 2 Transfers, Amount Transfer of assets from level 2 to level 1 Fair Value, Assets, Level 2 to Level 1 Transfers, Amount Transfers of liabilitiesfrom level 1 to level 2 Fair Value, Liabilities, Level 1 to Level 2 Transfers, Amount Transfer of Liabilities from level 2 to level 1 Fair Value, Liabilities, Level 2 to Level 1 Transfers, Amount Other-than-temporary impairment Cost-method Investments, Other than Temporary Impairment Cost method investments Cost Method Investments Notes Receivable and Investments in Related Parties Notes Receivable and Investments in Related Parties [Table Text block] Disclosure of investments in and notes receivable from a joint venture accounted for under the equity-method. Variable Interest Entity Maximum Loss Exposure Variable Interest Entity Maximum Loss Exposure [Table Text Block] Enterprise's maximum exposure to loss as a result of its involvement with the VIE, including how the maximum exposure is determined, the significant sources of the enterprise's exposure to the VIE, and the differences between the maximum exposure to loss and the liability recognized in its financial statements. It may also include factors such as the fair market value at which the registrant is carrying an asset and registrant guarantees. Also, whether the enterprise's maximum exposure to loss as a result of its involvement with the VIE cannot be quantified. In general, a VIE is a corporation, partnership, trust, or any other legal structure used for business purposes that either (a) does not have equity investors with voting rights or (b) has equity investors that do not provide sufficient financial resources for the entity to support its activities. A VIE often holds financial assets, including loans or receivables, real estate or other property. A VIE may be essentially passive or it may engage in research and development or other activities on behalf of another company. Schedule of Guarantor Obligations Schedule of Guarantor Obligations [Table Text Block] Remaining Guarantee Obligations Remaining Guarantee Obligations [Table Text Block] Represents the guarantor's disclosures which should include the information about each guarantee, or each group of similar guarantees, even if the likelihood of the guarantor's having to make any payments under the guarantee is remote. This excludes disclosures for product warranties. Schedule of Future Minimum Rental Payments for Operating Leases Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Schedule of Rent Expense Schedule of Rent Expense [Table Text Block] Purchase Obligation, Fiscal Year Maturity Schedule Contractual Obligation, Fiscal Year Maturity Schedule [Table Text Block] Income Statement [Abstract] Cost of revenue Cost of Goods Sold Gross profit Operating expenses: Operating Expenses [Abstract] Research and development Research and Development Expense (Excluding Acquired in Process Cost) Selling, general and administrative Selling, General and Administrative Expense Employee termination, asset impairment, and other charges Employee termination, asset impairment and other charges Employee termination, asset impairment and other charges incurred. Total operating expenses Operating Expenses Operating income Interest and other income (expense): Nonoperating Income (Expense) [Abstract] Interest income Investment Income, Interest Interest expense Interest Expense Other expense, net Other Nonoperating Income (Expense) Total interest and other expense, net Nonoperating Income (Expense) Income before taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Income tax expense (benefit) Net income Income per common share Earnings Per Share [Abstract] Weighted average shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Basic (in shares) Weighted Average Number of Shares Outstanding, Basic Diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Cash dividends declared per share (in USD per share) Common Stock, Dividends, Per Share, Declared Disclosure of Share-based Compensation Arrangements by Share-based Payment Award Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block] Employee Service Share-based Compensation , Unrecognized Costs Employee Service Share-based Compensation , Unrecognized Costs [Table Text Block] Employee Service Share-based Compensation , Unrecognized Costs [Table Text Block] Stock Option Activity Share-based Compensation, Stock Options, Activity [Table Text Block] Restricted Stock Unit Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block] Granted Stock Options Fair Value Assumptions Table Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block] Summarized Table Of All Shares Of Common Stock Reserved For Issuance Table Summarized Table Of All Shares Of Common Stock Reserved For Issuance Table [Table Text Block] Summarized table of all shares of common stock reserved for issuance. Income Tax Disclosure [Table] Income Tax Disclosure [Table] Income Tax Disclosure [Table] Internal Revenue Service (IRS) Internal Revenue Service (IRS) [Member] Income Tax Disclosure [Line Items] Income Tax Disclosure [Line Items] Income Tax Disclosure [Line Items] Tax cuts and jobs act of 2017, transition tax for accumulated foreign earnings, liability, incomplete accounting, provisional amount Tax Cuts and Jobs Act of 2017, Transition Tax for Accumulated Foreign Earnings, Liability, Incomplete Accounting, Provisional Amount Tax Cuts and Jobs Act of 2017, Transition Tax for Accumulated Foreign Earnings, Liability, Incomplete Accounting, Provisional Amount Tax on foreign earnings held in cash, percentage Tax on other specified assets, percentage Effective Income Tax Rate Reconciliation, Other Specified Assets, Percent Effective Income Tax Rate Reconciliation, Other Specified Assets, Percent Tax cuts and jobs Act of 2017, change in tax rate, income tax expense (benefit) provisional amount Tax Cuts and Jobs Act of 2017, Change in Tax Rate, Income Tax Expense (Benefit), Incomplete Accounting, Provisional Amount Tax Cuts and Jobs Act of 2017, Change in Tax Rate, Income Tax Expense (Benefit), Incomplete Accounting, Provisional Amount Deferred tax assets, projected effective rate at which position will reverse Deferred Tax Assets, Projected Effective Rate at Which Position Will Reverse Deferred Tax Assets, Projected Effective Rate at Which Position Will Reverse Deferred tax liabilities, projected effective rate at which position will reverse Deferred Tax Liabilities, Projected Effective Rate at Which Position Will Reverse Deferred Tax Liabilities, Projected Effective Rate at Which Position Will Reverse Tax cuts and jobs act of 2017, incomplete accounting, change in tax rate, deferred taxes, provisional income tax (expense) benefit Tax Cuts and Jobs Act of 2017, Incomplete Accounting, Change in Tax Rate, Deferred Taxes, Provisional Income Tax (Expense) Benefit Tax Cuts and Jobs Act of 2017, Incomplete Accounting, Change in Tax Rate, Deferred Taxes, Provisional Income Tax (Expense) Benefit Tax cuts and jobs act of 2017, transition tax for accumulated foreign earnings, liability, current, incomplete accounting, provisional amount Tax Cuts and Jobs Act of 2017, Transition Tax for Accumulated Foreign Earnings, Liability, Current, Incomplete Accounting, Provisional Amount Tax Cuts and Jobs Act of 2017, Transition Tax for Accumulated Foreign Earnings, Liability, Current, Incomplete Accounting, Provisional Amount Tax cuts and jobs acts of 2017, income tax benefit, foreign provisional amount Tax Cuts and Jobs Act of 2017, Deferred Tax Assets, Tax Credit Carryforwards, Foreign, Provisional Amount Tax Cuts and Jobs Act of 2017, Deferred Tax Assets, Tax Credit Carryforwards, Foreign, Provisional Amount Potential cash payments Tax Cuts and Jobs Act of 2017, Increase In Unrecognized Tax Benefits Is Reasonably Possible, Incomplete Accounting, Provisional Amount Tax Cuts and Jobs Act of 2017, Increase In Unrecognized Tax Benefits Is Reasonably Possible, Incomplete Accounting, Provisional Amount Undistributed earnings of foreign subsidiaries Undistributed Earnings of Foreign Subsidiaries Operating loss and tax credit carryforward, amount Operating Loss And Tax Credit Carryforwards, Amount Operating Loss And Tax Credit Carryforwards, Amount Deferred tax liabilities, intangible assets Deferred Tax Liabilities, Intangible Assets Deferred tax assets, valuation allowance Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount Deferred tax assets, operating loss carryforwards, foreign Deferred Tax Assets, Operating Loss Carryforwards, Foreign Deferred tax assets, tax credit carryforwards Deferred Tax Assets, Tax Credit Carryforwards Net operating loss benefits, stock-based compensation deductions Net Operating Loss Benefits, Stock-based Compensation Deductions Net Operating Loss Benefits, Stock-based Compensation Deductions Income tax holiday, aggregate dollar amount Income Tax Holiday, Aggregate Dollar Amount Income tax holiday, income tax benefits per share (in dollars per share) Income Tax Holiday, Income Tax Benefits Per Share Operating loss carryforwards, valuation allowance Operating Loss Carryforwards, Valuation Allowance Tax credit carryforward, valuation allowance Tax Credit Carryforward, Valuation Allowance Unrecognized tax benefits, income tax penalties and interest accrued Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued Federal tax, subject to interest Product Warranties Disclosures [Abstract] Movement in Standard Product Warranty Accrual [Roll Forward] Movement in Standard Product Warranty Accrual [Roll Forward] Warranty accrual, beginning of period Standard Product Warranty Accrual Warranty liabilities assumed as a result of acquisitions Standard Product Warranty Accrual, Additions from Business Acquisition Charges to operations Standard Product Warranty Accrual, Increase for Warranties Issued Utilization Standard Product Warranty Accrual, Decrease for Payments Changes in estimate related to pre-existing warranties Standard Product Warranty Accrual, Increase (Decrease) for Preexisting Warranties Warranty accrual, end of period 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] Treasury Stock Treasury Stock [Member] Additional Paid-In Capital Additional Paid-in Capital [Member] Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Statement [Line Items] Statement [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Beginning Balance Beginning Balance, Shares Shares, Issued Stock-based compensation Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Common stock issued in connection with acquisition Stock Issued During Period, Value, Acquisitions Common stock issued in connection with acquisition, shares Stock Issued During Period, Shares, Acquisitions Stock awards assumed in acquisition Adjustments To Additional Paid In Capital Share Based Compensation Stock Awards Assumed In Acquisition Adjustments to additional paid in capital share based compensation stock awards assumed in acquisition. Increase in excess tax benefits from employee stock plans Adjustments To Additional Paid In Capital Tax Effect Of Employee Stock Plans Adjustments to additional paid in capital tax effect of employee stock plans. Shares issued in conjunction with settlement of convertible notes, shares Stock Issued During Period, Shares, Conversion of Convertible Securities Shares received in conjunction with assumed call options, shares Stock Acquired During Period, Shares, Convertible Securities Hedge Number of shares acquired during the period as a result of the convertible security hedge. Repurchases of common stock Treasury Stock, Value, Acquired, Cost Method Repurchases of common stock, shares Treasury Stock, Shares, Acquired Dividends to shareholders Dividends Declared Equity impact of dividends declared by an entity during the period. This element includes paid and unpaid dividends declared during the period. Actuarial pension loss Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax Foreign currency translation gains (losses) Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax Net unrealized gain (loss) on derivative contracts Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax Equity value of convertible debt issuance, net of deferred taxes Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt Ending Balance Ending Balance, Shares Shareholders' Equity Shareholders' Equity and Share-based Payments [Text Block] Preferred stock, par value (in USD per share) Preferred Stock, Par or Stated Value Per Share Preferred stock, authorized (in shares) Preferred Stock, Shares Authorized Preferred stock, issued (in shares) Preferred Stock, Shares Issued Preferred stock, outstanding (in shares) Preferred Stock, Shares Outstanding Common stock, par value (in USD per share) Common Stock, Par or Stated Value Per Share Common stock, authorized (in shares) Common Stock, Shares Authorized Common stock, issued (in shares) Common Stock, Shares, Issued Common stock, outstanding (in shares) Common Stock, Shares, Outstanding Treasury stock, shares Treasury Stock, Shares Business Segment, Geographic Information and Concentration of Risk Concentration Risk Disclosure [Text Block] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Fair Value, Measurements, Recurring Fair Value, Measurements, Recurring [Member] Asset Class [Axis] Asset Class [Axis] Asset Class [Domain] Asset Class [Domain] Money market funds Money Market Funds [Member] Certificates of deposit Certificates of Deposit [Member] Corporate notes and bonds Corporate note and bond securities [Member] This category includes information about short and long term bond and debt securities that are issued by either a domestic or foreign corporate business entity with a date certain promise of repayment and a return to the holder for the time value of money (for example, variable or fixed interest, original issue discount). Asset-backed securities Asset-backed Securities [Member] Municipal notes and bonds Municipal notes and bonds [Member] Short and long-term debt securities issued by state, city or local governments or the agencies operated by state, city or local governments. Equity securities Equity Securities [Member] U.S. Treasury securities US Treasury Securities [Member] U.S. Government agency securities US Government Agencies Debt Securities [Member] International government securities Foreign Government Debt Securities [Member] Foreign exchange contracts Foreign Exchange Contract [Member] Exchange options Note Conversion Options [Member] Note Conversion Options [Member] Level 1 Fair Value, Inputs, Level 1 [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] Cash equivalents: Cash and Cash Equivalents, Fair Value Disclosure Short-term investments: Short-term Investments, Fair Value Disclosure Short-term Investments, Fair Value Disclosure Long-term investments: Long-term Investments, Fair Value Disclosure Long-term Investments, Fair Value Disclosure Foreign exchange contracts Derivative Asset Total assets at fair value Assets, Fair Value Disclosure Derivative liability Derivative Liability Total liabilities fair value Financial and Nonfinancial Liabilities, Fair Value Disclosure Fair Value Measurements and Investments Fair Value Disclosures [Text Block] Schedule of Debt Schedule of Debt [Table Text Block] Schedule of Maturities of Debt Schedule of Maturities of Long-term Debt [Table Text Block] Suboptimal exercise factor Share-based Compensation Fair Value Assumptions Sub-optimal Exercise Factor Factor to estimate the amount of option exercises prior to the end of their respective term. Risk free interest rate, minimum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum Risk free interest rate, maximum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum Expected stock price volatility, minimum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum Expected stock price volatility, maximum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Maximum Weighted-average expected volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Weighted Average Volatility Rate Post-vesting termination rate Share Based Compensation Fair Value Assumptions Post Vesting Termination Rate Factor to estimate the amount of vested options that will be exercised within 90 days as a result of employee termination. Dividends Payable [Table] Dividends Payable [Table] Dividends Payable [Line Items] Dividends Payable [Line Items] Dividends declared Payment of common stock dividends Payments of Ordinary Dividends, Common Stock Dividends payable, date declared Dividends Payable, Date Declared Dividends payable, date of record Dividends Payable, Date of Record Dividends payable, date to be paid Dividends Payable, Date to be Paid Expiration period Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period Vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Number of shares authorized Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Number of shares to be issued for every one share actually issued in connection with award Number Of Shares To Be Issued For Every One Share Actually Issued In Connection With Award Number Of Shares To Be Issued For Every One Share Actually Issued In Connection With Award Net Income Per Common Share Earnings Per Share [Text Block] Non-current net tax payable Accrued Income Taxes, Noncurrent Other non-current liabilities Other Miscellanious Liabilities, Noncurrent Other Miscellanious Liabilities, Noncurrent Other liabilities Cash and Marketable Securities [Abstract] Cash and Marketable Securities [Abstract] Short-term available-for-sale securities (included within Other current assets) Long-term available-for-sale securities (included within Other non-current assets) Available-for-sale Securities, Noncurrent Total cash, cash equivalents and available-for-sale securities Total Cash And Cash Equivalents And Available-for-sale Securities Total Cash And Cash Equivalents And Available-for-sale Securities Employee Termination, Asset Impairment and Other Charges Employee Termination Benefits And Other Charges Disclosure [Text Block] Employee Termination Benefits and Other Charges Disclosure [Text Block] Class of Treasury Stock [Table] Class of Treasury Stock [Table] Share Repurchase Program [Axis] Share Repurchase Program [Axis] Share Repurchase Program [Domain] Share Repurchase Program [Domain] Stock Repurchase Program Effective Until February 3 2020 Stock Repurchase Program Effective Until February 3 2020 [Member] Stock Repurchase Program Effective Until February 3 2020 [Member] Equity, Class of Treasury Stock [Line Items] Equity, Class of Treasury Stock [Line Items] Stock repurchase program, number of shares authorized to be repurchased Stock Repurchase Program, Authorized Amount Repurchases of stock, shares Repurchases of stock, value Japan Pension Plans Defined Cost Foreign Pension Plans Defined Cost [Member] Foreign Pension Plans Defined Cost [Member] Expected long-term rate of return on plan assets Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets 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] Existing technology Existing Technology [Member] Existing technology. Trade names and trademarks Trade names and trademarks [Member] Trade names and trademarks [Member] Customer relationships Customer Relationships [Member] Other Other Intangible [Member] Other intangible. Leasehold interests Leasehold Interests [Member] Leasehold interests. Weighted Average Amortization Period Acquired Finite-lived Intangible Asset, Weighted-Average Period before Renewal or Extension Finite-lived intangible assets Finite-Lived Intangible Assets, Gross In-process research and development Indefinite-Lived Intangible Assets (Excluding Goodwill) Total intangible assets Intangible Assets, Gross (Excluding Goodwill) Accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Intangible assets, net Schedule of Revenues from External Customers and Long-Lived Assets [Table] Schedule of Revenues from External Customers and Long-Lived Assets [Table] Malaysia MALAYSIA Thailand THAILAND Revenues from External Customers and Long-Lived Assets [Line Items] Revenues from External Customers and Long-Lived Assets [Line Items] Long-lived assets Long-Lived Assets Legal Proceedings Legal Matters and Contingencies [Text Block] Concentration Risk [Table] Concentration Risk [Table] Valuation Allowances and Reserves Type [Axis] Valuation Allowances and Reserves Type [Axis] Valuation Allowances and Reserves [Domain] Valuation Allowances and Reserves [Domain] Allowance for Doubtful Accounts Allowance for Doubtful Accounts [Member] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Customer Concentration Risk Customer Concentration Risk [Member] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Sales Revenue, Net Sales Revenue, Net [Member] Accounts Receivable Accounts Receivable [Member] Customer [Axis] Customer [Axis] Customer [Domain] Customer [Domain] Apple, Inc. Apple, Inc. [Member] Apple, Inc. [Member] Dell Inc. Dell Inc. [Member] Dell Inc. [Member] Top Ten Customers Top Ten Customers [Member] Top Ten Customers [Member] Concentration Risk [Line Items] Concentration Risk [Line Items] Number of operating segments Number of Operating Segments Concentration risk, percentage Concentration Risk, Percentage Entity wide accounts receivable major customer percentage Entity Wide Accounts Receivable Major Customer Percentage Aggregate percentage of customers net accounts receivable balance due greater than ten percent of the entity's accounts receivable balance. Valuation allowances and reserves, balance Valuation Allowances and Reserves, Balance Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Fiscal Year Fiscal Period, Policy [Policy Text Block] Basis of Consolidation Consolidation, Subsidiaries or Other Investments, Consolidated Entities, Policy [Policy Text Block] Reclassification Reclassification, Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Marketable Securities, Available-for-sale Securities Marketable Securities, Available-for-sale Securities, Policy [Policy Text Block] Equity Method Investments Equity Method Investments [Policy Text Block] Variable Interest Entity Consolidation, Variable Interest Entity, Policy [Policy Text Block] Fair Value of Financial Instruments Fair Value of Financial Instruments, Policy [Policy Text Block] Inventories Inventory, Policy [Policy Text Block] Property, Plant and Equipment Property, Plant and Equipment, Policy [Policy Text Block] Business Combinations Business Combinations Policy [Policy Text Block] Goodwill and Other Long-Lived Assets Goodwill and Intangible Assets, Policy [Policy Text Block] Revenue Recognition Revenue Recognition, Policy [Policy Text Block] Warranty Standard Product Warranty, Policy [Policy Text Block] Litigation and Other Contingencies Commitments and Contingencies, Policy [Policy Text Block] Advertising Expense Advertising Costs, Policy [Policy Text Block] Research and Development Expense Research and Development Expense, Policy [Policy Text Block] Income Taxes Income Tax, Policy [Policy Text Block] Income Per Common Share Earnings Per Share, Policy [Policy Text Block] Stock-based Compensation Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] Other Comprehensive Income (Loss), Net of Tax Other Comprehensive Income (Loss), Net of Tax [Policy Text Block] Disclosure of accounting policy for other comprehensive income (loss), net of tax. Derivative Contracts Derivatives, Policy [Policy Text Block] Pensions and Other Postretirement Benefit Plans Pension and Other Postretirement Plans, Policy [Policy Text Block] Fair Value Measurements and Investments Fair Value Measurement, Policy [Policy Text Block] Defined Benefit Plan, Asset Categories [Axis] Defined Benefit Plan, Asset Categories [Axis] Plan Asset Categories [Domain] Plan Asset Categories [Domain] Equity Commingled/Mutual Funds Equity Commingled/Mutual Funds [Member] Equity Commingled/Mutual Funds [Member] Fixed income commingled/mutual funds Cash equivalents and short-term investments Cash and Cash Equivalents [Member] Defined benefit plan, fair value of plan assets Quarterly Results of Operations Quarterly Financial Information [Table Text Block] Obligations and Funded Status Changes in Projected Benefit Obligations, Fair Value of Plan Assets, and Funded Status of Plan [Table Text Block] Unfunded Amounts Recognized on Consolidated Balance Sheets Schedule of Amounts Recognized in Balance Sheet [Table Text Block] Schedule of Assumptions Used Schedule of Assumptions Used [Table Text Block] Schedule of Defined Benefit Plans Disclosures Schedule of Defined Benefit Plans Disclosures [Table Text Block] Statement of Comprehensive Income [Abstract] Other comprehensive income (loss), before tax: Other Comprehensive Income (Loss), Net of Tax [Abstract] Rent expense, net Operating Leases, Rent Expense, Net Other Comprehensive Income Reclassifications [Abstract] Other Comprehensive Income Reclassifications [Abstract] Reclassification out of Accumulated Other Comprehensive Income [Table] Reclassification out of Accumulated Other Comprehensive Income [Table] 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 Reclassification out of Accumulated Other Comprehensive Income [Member] Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest [Member] Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items] Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items] Total reclassifications for the period Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Condensed Income Statement [Table] Condensed Income Statement [Table] Condensed Income Statements, Captions [Line Items] Condensed Income Statements, Captions [Line Items] Intercompany operating expense Intercompany operating expense (income) Intercompany operating expense (income) between parent, guarantor and non-guarantor entities Income tax expense (benefit) Equity in earnings from subsidiaries Income (Loss) from Subsidiaries, Net of Tax Restructuring and related cost, accelerated depreciation Restructuring and Related Cost, Accelerated Depreciation 2019 Operating Leases, Future Minimum Payments Due, Next Twelve Months 2020 Operating Leases, Future Minimum Payments, Due in Two Years 2021 Operating Leases, Future Minimum Payments, Due in Three Years 2022 Operating Leases, Future Minimum Payments, Due in Four Years 2023 Operating Leases, Future Minimum Payments, Due in Five Years 2024 Operating Leases, Future Minimum Payments, Due Thereafter Total future minimum lease payments Operating Leases, Future Minimum Payments Due Foreign Income (Loss) from Continuing Operations before Income Taxes, Foreign Domestic Income (Loss) from Continuing Operations before Income Taxes, Domestic Schedule of Commitments, Contingencies and Guarantees [Table] Schedule of Commitments, Contingencies and Guarantees [Table] Schedule of Commitments, Contingencies and Guarantees [Table] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Toshiba Memory Corporation (TMC) Toshiba Memory Corporation [Member] Toshiba Memory Corporation [Member] Unissoft (Wuxi) Group Co Ltd. Unissoft (Wuxi) Group Co Ltd. [Member] Unissoft (Wuxi) Group Co Ltd. [Member] Investment, Name [Axis] Investment, Name [Axis] Investment, Name [Domain] Investment, Name [Domain] Flash Ventures Flash Ventures [Member] Flash Ventures [Member] Unis Venture Unis Venture [Member] Unis Venture [Member] Equity Method Investor, Name [Axis] Equity Method Investor, Name [Axis] Equity Method Investor, Name [Axis] Equity Method Investor, Name [Domain] Equity Method Investor, Name [Domain] Equity Method Investor, Name [Domain] Western Digital Corp Western Digital Corp [Member] Owner of record with less than 50% voting interest of the entity. Related Party Transactions [Abstract] Related Party Transactions [Abstract] Equity method investment, ownership percentage Equity Method Investment, Ownership Percentage Partner's ownership in venture business Partner's ownership in venture business Partner's ownership in venture business. Start-up cost commitment Start-up Cost Commitment Start-up Cost Commitment Investment funding commitments Investment Funding Commitments Percent of commitment by the Company to fund a venture's investment in situations where the venture's sales are insufficient to cover the investments. Payments for equity method investments Retained earnings, undistributed earnings from equity method investees Retained Earnings, Undistributed Earnings from Equity Method Investees Goodwill [Roll Forward] Goodwill [Roll Forward] Goodwill balance, beginning of period Purchase price adjustments to goodwill Goodwill, Purchase Accounting Adjustments Foreign currency translation adjustment Goodwill, Foreign Currency Translation Gain (Loss) Goodwill balance, end of period Proceeds on sale of trade accounts receivable Proceeds from Sale and Collection of Receivables Depreciation Depreciation Warranty accrual, noncurrent Standard Product Warranty Accrual, Noncurrent Warranty accrual, current Standard Product Warranty Accrual, Current Inventory Disclosure [Abstract] Inventories: Inventory, Net [Abstract] Raw materials and component parts Inventory, Raw Materials and Supplies, Net of Reserves Work-in-process Inventory, Work in Process, Net of Reserves Finished goods Inventory, Finished Goods, Net of Reserves Total inventories Intangible asset amortization Amortization of Intangible Assets Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Employee stock options, RSUs, PSUs, ESPP (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Diluted (in shares) Income per common share Net Income (Loss) Available to Common Stockholders, Basic [Abstract] Basic (in dollars per share) Basic Earnings Per Share, Pro Forma Anti-dilutive potential common shares excluded (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Income Tax Expense (Benefit) Income Tax Disclosure [Text Block] Debt Securities Debt Securities [Member] Other Assets Other Assets [Member] Accumulated benefit obligation Defined Benefit Plan, Accumulated Benefit Obligation Actuarial pension gains (losses) Prior service credits for defined benefit pension plans included in accumulated other comprehensive income at the balance sheet date Prior Service Credits For Defined Benefit Pension Plans Included In Accumulated Other Comprehensive Income At Balance Sheet Date Prior service credits for defined benefit pension plans included in accumulated other comprehensive income at the balance sheet date. Target asset allocation for securities Defined Benefit Plan, Plan Assets, Target Allocation, Percentage Defined benefit pension plan, estimated expenditure (years) Defined Benefit Plan Estimated Annual Benefits Payment Period Defined benefit plan estimated annual benefits payment period. Deferred tax assets: Deferred Tax Assets, Gross [Abstract] Sales related reserves and accrued expenses not currently deductible Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Reserves Accrued compensation and benefits not currently deductible Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Compensation Net operating loss carryforward Deferred Tax Assets, Operating Loss Carryforwards Business credit carryforward Long-lived assets Deferred Tax Assets, Property, Plant and Equipment Other Deferred Tax Assets, Other Total deferred tax assets Deferred Tax Assets, Gross Deferred tax liabilities: Deferred Tax Liabilities, Gross [Abstract] Long-lived assets Deferred Tax Liabilities, Property, Plant and Equipment Unremitted earnings of certain non-U.S. entities Deferred Tax Liabilities, Undistributed Foreign Earnings Other Deferred Tax Liabilities, Other Total deferred tax liabilities Deferred Tax Liabilities, Gross Valuation allowances Deferred Tax Assets, Valuation Allowance Deferred tax assets (liabilities), net Deferred Tax Assets, Net Deferred tax assets (liabilities), net Deferred Tax Liabilities, Net Accumulated Other Comprehensive Income Rollforward [Abstract] Accumulated Other Comprehensive Income Rollforward [Abstract] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Actuarial Pension Gains (Losses) Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member] Foreign Currency Translation Gains (Losses) Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Unrealized Gains (Losses) on Derivative Contracts and Available for Sale Securities Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] AOCI Attributable to Parent Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Roll Forward] Accumulated Other Comprehensive Income (Loss) [Roll Forward] Accumulated Other Comprehensive Income (Loss) [Roll Forward] Other comprehensive income (loss) before reclassifications OCI, before Reclassifications, before Tax, Attributable to Parent Amounts reclassified from accumulated other comprehensive income (loss) Reclassification from AOCI, Current Period, before Tax, Attributable to Parent Income tax benefit (expense) related to items of other comprehensive income (loss) Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent Net current-period other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Schedule of Earnings Per Share, Basic and Diluted Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]