0000001 - Document - Cover Page link:presentationLink link:calculationLink link:definitionLink 0000002 - Document - Audit Information link:presentationLink link:calculationLink link:definitionLink 0000003 - Statement - Consolidated Balance Sheets link:presentationLink link:calculationLink link:definitionLink 0000004 - Statement - Consolidated Balance Sheets (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 0000005 - Statement - Consolidated Statements of Operations link:presentationLink link:calculationLink link:definitionLink 0000006 - Statement - Consolidated Statements of Comprehensive Income (Loss) link:presentationLink link:calculationLink link:definitionLink 0000007 - Statement - Consolidated Statements of Cash Flows link:presentationLink link:calculationLink link:definitionLink 0000008 - Statement - Consolidated Statements of Convertible Preferred Stock and Shareholders' Equity link:presentationLink link:calculationLink link:definitionLink 0000009 - Disclosure - Organization and Basis of Presentation link:presentationLink link:calculationLink link:definitionLink 0000010 - Disclosure - Recent Accounting Pronouncements link:presentationLink link:calculationLink link:definitionLink 0000011 - Disclosure - Business Segments, Geographic Information, and Concentrations of Risk link:presentationLink link:calculationLink link:definitionLink 0000012 - Disclosure - Revenues link:presentationLink link:calculationLink link:definitionLink 0000013 - Disclosure - Supplemental Financial Statement Data link:presentationLink link:calculationLink link:definitionLink 0000014 - Disclosure - Fair Value Measurements and Investments link:presentationLink link:calculationLink link:definitionLink 0000015 - Disclosure - Derivative Instruments and Hedging Activities link:presentationLink link:calculationLink link:definitionLink 0000016 - Disclosure - Debt link:presentationLink link:calculationLink link:definitionLink 0000017 - Disclosure - Pension and Other Post-Retirement Benefit Plans link:presentationLink link:calculationLink link:definitionLink 0000018 - Disclosure - Related Parties and Related Commitments and Contingencies link:presentationLink link:calculationLink link:definitionLink 0000019 - Disclosure - Leases and Other Commitments link:presentationLink link:calculationLink link:definitionLink 0000020 - Disclosure - Western Digital Corporation 401(k) Plan link:presentationLink link:calculationLink link:definitionLink 0000021 - Disclosure - Shareholders’ Equity and Convertible Preferred Stock link:presentationLink link:calculationLink link:definitionLink 0000022 - Disclosure - Income Tax Expense link:presentationLink link:calculationLink link:definitionLink 0000023 - Disclosure - Net Income (Loss) Per Common Share link:presentationLink link:calculationLink link:definitionLink 0000024 - Disclosure - Employee Termination, Asset Impairment and Other Charges link:presentationLink link:calculationLink link:definitionLink 0000025 - Disclosure - Legal Proceedings link:presentationLink link:calculationLink link:definitionLink 9954701 - Disclosure - Organization and Basis of Presentation (Policies) link:presentationLink link:calculationLink link:definitionLink 9954702 - Disclosure - Business Segments, Geographic Information, and Concentrations of Risk (Tables) link:presentationLink link:calculationLink link:definitionLink 9954703 - Disclosure - Supplemental Financial Statement Data (Tables) link:presentationLink link:calculationLink link:definitionLink 9954704 - Disclosure - Fair Value Measurements and Investments (Tables) link:presentationLink link:calculationLink link:definitionLink 9954705 - Disclosure - Debt (Tables) link:presentationLink link:calculationLink link:definitionLink 9954706 - Disclosure - Pension and Other Post-Retirement Benefit Plans (Tables) link:presentationLink link:calculationLink link:definitionLink 9954707 - Disclosure - Related Parties and Related Commitments and Contingencies (Tables) link:presentationLink link:calculationLink link:definitionLink 9954708 - Disclosure - Leases and Other Commitments (Tables) link:presentationLink link:calculationLink link:definitionLink 9954709 - Disclosure - Shareholders’ Equity and Convertible Preferred Stock (Tables) link:presentationLink link:calculationLink link:definitionLink 9954710 - Disclosure - Income Tax Expense (Tables) link:presentationLink link:calculationLink link:definitionLink 9954711 - Disclosure - Net Income (Loss) Per Common Share (Tables) link:presentationLink link:calculationLink link:definitionLink 9954712 - Disclosure - Employee Termination, Asset Impairment and Other Charges (Tables) link:presentationLink link:calculationLink link:definitionLink 9954713 - Disclosure - Organization and Basis of Presentation - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9954714 - Disclosure - Organization and Basis of Presentation - Property, Plant and Equipment Useful Life (Details) link:presentationLink link:calculationLink link:definitionLink 9954715 - Disclosure - Recent Accounting Pronouncements - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9954716 - Disclosure - Business Segments, Geographic Information, and Concentrations of Risk - Segment Reporting Information, by Segment (Details) link:presentationLink link:calculationLink link:definitionLink 9954717 - Disclosure - Business Segments, Geographic Information, and Concentrations of Risk - Disaggregation of Revenue (Details) link:presentationLink link:calculationLink link:definitionLink 9954718 - Disclosure - Business Segments, Geographic Information, and Concentrations of Risk - Revenue by Geography (Details) link:presentationLink link:calculationLink link:definitionLink 9954719 - Disclosure - Business Segments, Geographic Information, and Concentrations of Risk - Long-lived Assets by Geography (Details) link:presentationLink link:calculationLink link:definitionLink 9954720 - Disclosure - Business Segments, Geographic Information, and Concentrations of Risk - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9954721 - Disclosure - Business Segments, Geographic Information, and Concentrations of Risk - Goodwill Rollforward (Details) link:presentationLink link:calculationLink link:definitionLink 9954722 - Disclosure - Supplemental Financial Statement Data - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9954723 - Disclosure - Supplemental Financial Statement Data - Inventory (Details) link:presentationLink link:calculationLink link:definitionLink 9954724 - Disclosure - Supplemental Financial Statement Data - Property, Plant and Equipment (Details) link:presentationLink link:calculationLink link:definitionLink 9954725 - Disclosure - Supplemental Financial Statement Data - Intangible Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9954726 - Disclosure - Supplemental Financial Statement Data - Movement in Standard Product Warranty Accrual (Details) link:presentationLink link:calculationLink link:definitionLink 9954727 - Disclosure - Supplemental Financial Statement Data - Total Warranty Accrual (Details) link:presentationLink link:calculationLink link:definitionLink 9954728 - Disclosure - Supplemental Financial Statement Data - Other Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9954729 - Disclosure - Supplemental Financial Statement Data - Accumulated Other Comprehensive Income (Loss) Roll Forward (Details) link:presentationLink link:calculationLink link:definitionLink 9954730 - Disclosure - Fair Value Measurements and Investments - Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) link:presentationLink link:calculationLink link:definitionLink 9954731 - Disclosure - Fair Value Measurements and Investments - Debt Instrument Fair Value (Details) link:presentationLink link:calculationLink link:definitionLink 9954732 - Disclosure - Derivative Instruments and Hedging Activities - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9954733 - Disclosure - Debt - Schedule of Debt (Details) link:presentationLink link:calculationLink link:definitionLink 9954733 - Disclosure - Debt - Schedule of Debt (Details) link:presentationLink link:calculationLink link:definitionLink 9954734 - Disclosure - Debt - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9954735 - Disclosure - Debt - Schedule of Leverage Ratios (Details) link:presentationLink link:calculationLink link:definitionLink 9954736 - Disclosure - Debt - Debt Maturities (Details) link:presentationLink link:calculationLink link:definitionLink 9954737 - Disclosure - Pension and Other Post-Retirement Benefit Plans - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9954738 - Disclosure - Pension and Other Post-Retirement Benefit Plans - Obligations and Funded Status (Details) link:presentationLink link:calculationLink link:definitionLink 9954739 - Disclosure - Pension and Other Post-Retirement Benefit Plans - Unfunded Amounts Recognized on Consolidated Balance Sheets (Details) link:presentationLink link:calculationLink link:definitionLink 9954740 - Disclosure - Pension and Other Post-Retirement Benefit Plans - Weighted-Average Actuarial Assumptions used to Determine Benefit Obligations (Details) link:presentationLink link:calculationLink link:definitionLink 9954741 - Disclosure - Pension and Other Post-Retirement Benefit Plans - Weighted-Average Actuarial Assumptions used to Determine Benefit Costs (Details) link:presentationLink link:calculationLink link:definitionLink 9954742 - Disclosure - Pension and Other Post-Retirement Benefit Plans - Defined Benefit Pension Plans' Major Asset Categories and Their Associated Fair Values (Details) link:presentationLink link:calculationLink link:definitionLink 9954743 - Disclosure - Related Parties and Related Commitments and Contingencies - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9954744 - Disclosure - Related Parties and Related Commitments and Contingencies - Equity Investments (Details) link:presentationLink link:calculationLink link:definitionLink 9954745 - Disclosure - Related Parties and Related Commitments and Contingencies - Maximum Loss Exposure (Details) link:presentationLink link:calculationLink link:definitionLink 9954746 - Disclosure - Related Parties and Related Commitments and Contingencies - JV Lease Guarantees (Details) link:presentationLink link:calculationLink link:definitionLink 9954747 - Disclosure - Related Parties and Related Commitments and Contingencies - Joint Venture Lease Amounts (Details) link:presentationLink link:calculationLink link:definitionLink 9954748 - Disclosure - Leases and Other Commitments - Supplemental Balance Sheet (Details) link:presentationLink link:calculationLink link:definitionLink 9954748 - Disclosure - Leases and Other Commitments - Supplemental Balance Sheet (Details) link:presentationLink link:calculationLink link:definitionLink 9954749 - Disclosure - Leases and Other Commitments - Supplemental Cash Flow (Details) link:presentationLink link:calculationLink link:definitionLink 9954750 - Disclosure - Leases and Other Commitments - Rent Expense, Net (Details) link:presentationLink link:calculationLink link:definitionLink 9954751 - Disclosure - Leases and Other Commitments - Long-Term Commitments (Details) link:presentationLink link:calculationLink link:definitionLink 9954752 - Disclosure - Western Digital Corporation 401(k) Plan - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9954753 - Disclosure - Shareholders’ Equity and Convertible Preferred Stock - 2021 Long Term Incentive Plan and ESPP (Details) link:presentationLink link:calculationLink link:definitionLink 9954754 - Disclosure - Shareholders’ Equity and Convertible Preferred Stock - Stock-Based Compensation Expense (Details) link:presentationLink link:calculationLink link:definitionLink 9954755 - Disclosure - Shareholders’ Equity and Convertible Preferred Stock - Unrecognized Share-based Compensation (Details) link:presentationLink link:calculationLink link:definitionLink 9954756 - Disclosure - Shareholders’ Equity and Convertible Preferred Stock - Stock Option Activity (Details) link:presentationLink link:calculationLink link:definitionLink 9954757 - Disclosure - Shareholders’ Equity and Convertible Preferred Stock - Restricted Stock Units And Performance Share Units (Details) link:presentationLink link:calculationLink link:definitionLink 9954758 - Disclosure - Shareholders’ Equity and Convertible Preferred Stock - Fair Values Assumptions User For Employee Stock Purchase Plan Granted (Details) link:presentationLink link:calculationLink link:definitionLink 9954759 - Disclosure - Shareholders’ Equity and Convertible Preferred Stock - Convertible Preferred Stock (Details) link:presentationLink link:calculationLink link:definitionLink 9954760 - Disclosure - Shareholders’ Equity and Convertible Preferred Stock - Stock Repurchase Program (Details) link:presentationLink link:calculationLink link:definitionLink 9954761 - Disclosure - Shareholders’ Equity and Convertible Preferred Stock - Stock Reserved for Issuance (Details) link:presentationLink link:calculationLink link:definitionLink 9954762 - Disclosure - Income Tax Expense - Domestic and Foreign Components of Income Before Income Taxes (Details) link:presentationLink link:calculationLink link:definitionLink 9954763 - Disclosure - Income Tax Expense - Components of Provision for Income Taxes (Details) link:presentationLink link:calculationLink link:definitionLink 9954764 - Disclosure - Income Tax Expense - Deferred Tax Assets and Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9954765 - Disclosure - Income Tax Expense - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9954766 - Disclosure - Income Tax Expense - Reconciliation of the U.S. Federal statutory rate (Details) link:presentationLink link:calculationLink link:definitionLink 9954767 - Disclosure - Income Tax Expense - NOL Carryforward (Details) link:presentationLink link:calculationLink link:definitionLink 9954768 - Disclosure - Income Tax Expense - Unrecognized Tax Benefits (Details) link:presentationLink link:calculationLink link:definitionLink 9954769 - Disclosure - Net Income (Loss) Per Common Share (Details) link:presentationLink link:calculationLink link:definitionLink 9954770 - Disclosure - Net Income (Loss) Per Common Share - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9954771 - Disclosure - Employee Termination, Asset Impairment and Other Charges - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9954772 - Disclosure - Employee Termination, Asset Impairment and Other Charges - Expense Recognition (Details) link:presentationLink link:calculationLink link:definitionLink 9954773 - Disclosure - Employee Termination, Asset Impairment and Other Charges - Business Realignment Activities (Details) link:presentationLink link:calculationLink link:definitionLink