v2.4.0.8

Debt (Details) (USD $) In Millions, unless otherwise specified				3 Months Ended
	Sep. 27, 2013	Apr. 30, 2013	Jan. 18, 2011	Sep. 27, 2013 Secured Senior Second Priority Notes 10 Percent due May 2014 [Member]	Sep. 27, 2013 6.8% Senior Notes due October 2016	Sep. 27, 2013 Senior Notes 7.75 Percent Due December 2018 [Member]	Sep. 27, 2013 Senior Notes 6.875 Percent due May 2020 [Member]	Sep. 27, 2013 Senior Notes 7.00 Percent Due November 2021 [Member]	Sep. 27, 2013 LaCie S.A. [Member]
Debt Disclosure [Abstract]
Line of Credit Facility, Maximum Borrowing Capacity		$ 500	$ 350
Sub-limit for issuance of letters of credit under revolving credit facility			75
Line of Credit Facility Letters of Credit Outstanding	2
Debt Instrument [Line Items]
Stated interest rate (as a percent)					6.80%	7.75%	6.875%	7.00%
Aggregate principal amount					600	750	600	600
Loss on redemption of debt				(22)
Long-term Debt									6
Long-term Debt, Current Maturities									$ 1

X

- Definition

The maximum amount available for issuances of letters of credit under the revolving credit facility.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The amount of letters of credit issued under the credit facility.

+ References

No definition available.

+ Details

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Namespace Prefix:	stx_
Data Type:	xbrli:monetaryItemType
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X

- Details

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X

- Definition

The stated principal amount of the debt instrument at time of issuance, which may vary from the carrying amount because of unamortized premium or discount.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399



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-Publisher FASB

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 21

-Paragraph 16, 20

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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X

- Definition

Interest rate stated in the contractual debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5



Reference 2: http://www.xbrl.org/2003/role/presentationRef

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-Topic 210

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-Subparagraph (SX 210.5-02.22(a)(1))

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- Details

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X

- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 10

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-Paragraph 28

-Subparagraph (b)

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-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 26

-Paragraph 20, 21

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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X

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 129

-Paragraph 2, 4

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

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-Section S99

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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

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X

- Definition

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

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-Publisher SEC

-Name Regulation S-X (SX)

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-Section 03

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Period Type:	instant

X

- Definition

Carrying amount of long-term debt, net of unamortized discount or premium, scheduled to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

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