XML 86 R57.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Commitments, Contingencies and Related Parties Additional Information (Details Textuals) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Dec. 29, 2017 | Dec. 29, 2017 | Dec. 30, 2016 | Jun. 30, 2017
Related Party Transactions [Abstract] |  |  |  |
Investment funding commitments | 50.00% | 50.00% |  |
Acquisitions, net of cash acquired |  | $ (99) | $ 0 |
Accounts payable to related parties | $ 250 | $ 250 |  | $ 206
Western Digital Corp |  |  |  |
Related Party Transactions [Abstract] |  |  |  |
Start-up cost commitment |  | 50.00% |  |
Investment funding commitments | 50.00% | 50.00% |  |
Western Digital Corp | Minimum |  |  |  |
Related Party Transactions [Abstract] |  |  |  |
Investment funding commitments | 49.90% | 49.90% |  |
Western Digital Corp | Maximum |  |  |  |
Related Party Transactions [Abstract] |  |  |  |
Investment funding commitments | 50.00% | 50.00% |  |
Equity Method Investee |  |  |  |
Related Party Transactions [Abstract] |  |  |  |
Acquisitions, net of cash acquired | $ (1,166) | $ (1,958) |  |
Accounts payable to related parties | $ 250 | $ 250 |  | $ 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
- Definition The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585 + Details
Name: | us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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 Start-up Cost Commitment + References No definition available. + Details
Name: | wdc_StartupCostCommitment
Namespace Prefix: | wdc_
Data Type: | num:percentItemType
Balance Type: | na
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: |