XML 57 R44.htm IDEA: XBRL DOCUMENT v3.8.0.1

Fair Value Measurements and Investments Debt Instrument Fair Value (Details) - USD ($) $ in Millions	Sep. 29, 2017		Jun. 30, 2017
Debt Instrument [Line Items]
Long-term debt, including current portion	$ 13,131		$ 13,151
Secured Notes
Debt Instrument [Line Items]
Debt, long-term and short-term, combined amount	1,835		1,835
Long-term debt, fair value	2,056		2,062
Unsecured Notes
Debt Instrument [Line Items]
Debt, long-term and short-term, combined amount	3,248		3,244
Long-term debt, fair value	3,939		3,956
Term Loan A
Debt Instrument [Line Items]
Debt, long-term and short-term, combined amount	4,026		4,074
Long-term debt, fair value	4,096		4,130
U.S. Term Loan B-2
Debt Instrument [Line Items]
Debt, long-term and short-term, combined amount	2,962		2,968
Long-term debt, fair value	2,983		2,989
Euro Term Loan B-2
Debt Instrument [Line Items]
Debt, long-term and short-term, combined amount	1,030		1,000
Long-term debt, fair value	1,039	[1]	1,010
Convertible Debt 2020
Debt Instrument [Line Items]
Debt, long-term and short-term, combined amount	30		30
Long-term debt, fair value	34		34
Total
Debt Instrument [Line Items]
Long-term debt, including current portion	13,131		13,151
Long-term debt, fair value	$ 14,147		$ 14,181
[1] Euro Term Loan B-2 outstanding principal amounts as of September 29, 2017 and June 30, 2017 were based upon the Euro to U.S. dollar exchange rate as of those respective dates.

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

X

- Definition

Represents the aggregate of total long-term debt, including current maturities and short-term debt.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtLongtermAndShorttermCombinedAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 3: 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(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_LongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

No definition available.

+ Details

Name:	us-gaap_LongTermDebtFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	us-gaap_DebtInstrumentAxis=wdc_SecuredNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=wdc_UnsecuredNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=wdc_TermLoanAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=wdc_U.S.TermLoanB2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=wdc_EuroTermLoanB2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=wdc_ConvertibleSeniorNotesDueTwoThousandTwentyMemberMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=wdc_DebtCostMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: