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v3.20.2

Consolidated Statements of Shareholders' Equity - USD ($) $ in Millions | Total | Cumulative Effect, Period of Adoption, Adjustment | Common Stock | Treasury Stock | Additional Paid-In Capital | Additional Paid-In Capital Cumulative Effect, Period of Adoption, Adjustment | Accumulated Other Comprehensive Income (Loss) | Retained Earnings | Retained Earnings Cumulative Effect, Period of Adoption, Adjustment
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning balance at Jun. 30, 2017 | $ 11,418 | $ 51 | $ 3 | $ (1,666) | $ 4,506 | $ (19) | $ (58) | $ 8,633 | $ 70
Beginning balance (in shares) at Jun. 30, 2017 |  |  | 312,000,000 | 18,000,000 |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |
Net income (loss) | 675 |  |  |  |  |  |  | 675 |
Employee stock plans | 49 |  |  | $ 813 | (764) |  |  |  |
Employee stock plans (in shares) |  |  |  | 9,000,000 |  |  |  |  |
Stock-based compensation | 377 |  |  |  | 377 |  |  |  |
Equity value of convertible debt issuance, net of deferred taxes | 125 |  |  |  | 125 |  |  |  |
Repurchases of common stock | (591) |  |  | $ (591) |  |  |  |  |
Repurchases of common stock (in shares) |  |  |  | 7,000,000 |  |  |  |  |
Dividends to shareholders | (592) |  |  |  | 29 |  |  | (621) |
Actuarial pension gain | (1) |  |  |  |  |  | (1) |  |
Foreign currency translation adjustment | 18 |  |  |  |  |  | 18 |  |
Net unrealized gain on derivative contracts and available-for-sale securities | 2 |  |  |  |  |  | 2 |  |
Ending balance at Jun. 29, 2018 | 11,531 | 56 | $ 3 | $ (1,444) | 4,254 |  | (39) | 8,757 | 56
Ending balance (in shares) at Jun. 29, 2018 |  |  | 312,000,000 | 16,000,000 |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |
Net income (loss) | (754) |  |  |  |  |  |  | (754) |
Employee stock plans | 3 |  |  | $ 739 | (736) |  |  |  |
Employee stock plans (in shares) |  |  |  | 7,000,000 |  |  |  |  |
Stock-based compensation | 306 |  |  |  | 306 |  |  |  |
Repurchases of common stock | (563) |  |  | $ (563) |  |  |  |  |
Repurchases of common stock (in shares) |  |  |  | 8,000,000 |  |  |  |  |
Dividends to shareholders | (583) |  |  |  | 27 |  |  | (610) |
Actuarial pension gain | (34) |  |  |  |  |  | (34) |  |
Foreign currency translation adjustment | 25 |  |  |  |  |  | 25 |  |
Net unrealized loss on derivative contracts | (20) |  |  |  |  |  | (20) |  |
Ending balance at Jun. 28, 2019 | 9,967 | $ (5) | $ 3 | $ (1,268) | 3,851 |  | (68) | 7,449 | $ (5)
Ending balance (in shares) at Jun. 28, 2019 |  |  | 312,000,000 | 17,000,000 |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |
Net income (loss) | (250) |  |  |  |  |  |  | (250) |
Employee stock plans | 69 |  |  | $ 531 | (462) |  |  |  |
Employee stock plans (in shares) |  |  |  | 7,000,000 |  |  |  |  |
Stock-based compensation | $ 308 |  |  |  | 308 |  |  |  |
Repurchases of common stock (in shares) | 0 |  |  |  |  |  |  |  |
Dividends to shareholders | $ (449) |  |  |  | 20 |  |  | (469) |
Actuarial pension gain | (5) |  |  |  |  |  | (5) |  |
Foreign currency translation adjustment | (6) |  |  |  |  |  | (6) |  |
Net unrealized loss on derivative contracts | (78) |  |  |  |  |  | (78) |  |
Ending balance at Jul. 03, 2020 | $ 9,551 |  | $ 3 | $ (737) | $ 3,717 |  | $ (157) | $ 6,725 |
Ending balance (in shares) at Jul. 03, 2020 |  |  | 312,000,000 | 10,000,000 |  |  |  |  |

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- Definition Other Comprehensive Income Unrealized Gain (Loss) On Derivatives Arising During Period And Available-For-Sale Securities Adjustment Before Reclassification Adjustments, Net of Tax + References No definition available. + Details
Name: | wdc_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodAndAvailableForSaleSecuritiesAdjustmentBeforeReclassificationAdjustmentsNetofTax
Namespace Prefix: | wdc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration