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Label Element Value
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation $ 104,000,000
APIC, Share-based Payment Arrangement, Increase for Cost Recognition us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue 394,000,000
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax (113,000,000)
Other Comprehensive Income Unrealized Gain (Loss) On Derivatives Arising During Period And Available-For-Sale Securities Adjustment Before Reclassification Adjustments, Net of Tax wdc_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodAndAvailableForSaleSecuritiesAdjustmentBeforeReclassificationAdjustmentsNetofTax (75,000,000)
Treasury Stock [Member]  
Stock Issued During Period, Value, Employee Stock Purchase Plan us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan $ 583,000,000
Stock Issued During Period, Shares, Employee Stock Purchase Plans us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans 10,000,000
Retained Earnings [Member]  
Dividends Declared wdc_DividendsDeclared $ 612,000,000
Additional Paid-in Capital [Member]  
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation 104,000,000
Cumulative Effect of New Accounting Principle in Period of Adoption us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption (19,000,000)
APIC, Share-based Payment Arrangement, Increase for Cost Recognition us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue 394,000,000
Dividends Declared wdc_DividendsDeclared (35,000,000)
Stock Issued During Period, Value, Employee Stock Purchase Plan us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan (472,000,000)
AOCI Attributable to Parent [Member]  
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax (113,000,000)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax (27,000,000)
Other Comprehensive Income Unrealized Gain (Loss) On Derivatives Arising During Period And Available-For-Sale Securities Adjustment Before Reclassification Adjustments, Net of Tax wdc_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodAndAvailableForSaleSecuritiesAdjustmentBeforeReclassificationAdjustmentsNetofTax $ (75,000,000)