XML 95 R77.htm IDEA: XBRL DOCUMENT v3.10.0.1

Business Segment, Geographic Information and Concentration of Risk Revenue by End Market (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Jun. 29, 2018	Mar. 30, 2018	Dec. 29, 2017	Sep. 29, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 30, 2016	Sep. 30, 2016	Jun. 29, 2018	Jun. 30, 2017	Jul. 01, 2016
Revenue, Major Customer [Line Items]
Revenue, net	$ 5,117	$ 5,013	$ 5,336	$ 5,181	$ 4,842	$ 4,649	$ 4,888	$ 4,714	$ 20,647	$ 19,093	$ 12,994
Client Devices
Revenue, Major Customer [Line Items]
Revenue, net									10,108	9,520	6,205
Data Center Devices & Solutions
Revenue, Major Customer [Line Items]
Revenue, net									6,075	5,505	4,919
Client Solutions
Revenue, Major Customer [Line Items]
Revenue, net									$ 4,464	$ 4,068	$ 1,870

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_EntityWideRevenueMajorCustomerLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1(a))
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

+ Details

Name:	us-gaap_SalesRevenueGoodsNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	wdc_EndMarketsAxis=wdc_ClientDevicesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	wdc_EndMarketsAxis=wdc_DataCenterDevicesSolutionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	wdc_EndMarketsAxis=wdc_ClientSolutionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: