XML 86 R73.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Employee Termination, Asset Impairment and Other Charges Restructuring Plan (Detail Textuals) - USD ($) $ in Millions | 9 Months Ended
--- | ---
Mar. 30, 2018 | Mar. 31, 2017
Restructuring Plan 2016 | Cost of revenue |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring and related cost, accelerated depreciation | $ 9 | $ 37

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_RestructuringCostAndReserveLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of accelerated depreciation charged against earnings associated with exit from or disposal of business activities or restructuring plan. + References No definition available. + Details
Name: | us-gaap_RestructuringReserveAcceleratedDepreciation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_RestructuringPlanAxis=wdc_RestructuringPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_CostOfSalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |