XML 65 R52.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Commitments, Contingencies and Related Parties Additional Information (Details Textuals) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Sep. 29, 2017 | Jun. 30, 2017
Related Party Transactions [Abstract] |  |
Accounts payable to related parties | $ 226 | $ 206
Investment Funding Commitments | 50.00% |
Western Digital Corp [Member] | Minimum [Member] |  |
Related Party Transactions [Abstract] |  |
Investment Funding Commitments | 49.90% |
Western Digital Corp [Member] | Maximum [Member] |  |
Related Party Transactions [Abstract] |  |
Investment Funding Commitments | 50.00% |
Equity Method Investee [Member] |  |
Related Party Transactions [Abstract] |  |
Payments for (Proceeds from) Equity Method Investments | $ (792) |
Accounts payable to related parties | $ 226 | $ 206

X
- Definition Amount for accounts payable to related parties. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(a)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39603-107864 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39622-107864 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(k)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
Name: | us-gaap_AccountsPayableRelatedPartiesCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_RelatedPartyTransactionsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition 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. + References No definition available. + Details
Name: | wdc_InvestmentFundingCommitments
Namespace Prefix: | wdc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The net amount paid (received) by the reporting entity through purchases of product, investments in equity method investments and loans made to and loan proceeds from equity method investments. + References No definition available. + Details
Name: | wdc_PaymentsforProceedsfromEquityMethodInvestments
Namespace Prefix: | wdc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | wdc_EquityMethodInvestorNameAxis=wdc_WesternDigitalCorpMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=us-gaap_EquityMethodInvesteeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |