v2.4.0.8

Acquisitions (Details 3) (LaCie S.A. [Member])	Sep. 27, 2013	Aug. 03, 2012
LaCie S.A. [Member]
Business Acquisition [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent	94.83%
Business Acquisition, Contingent Consideration Condition Must Be Reached (Period)		6

X

- Definition

Represents the periods (in month) following the close of the acquisition the pre-defined condition for contingent consideration must be met to qualify for the contingent consideration.

+ References

No definition available.

+ Details

Name:	stx_BusinessAcquisitionContingentConsiderationConditionMustBeReachedPeriod
Namespace Prefix:	stx_
Data Type:	us-types:durationStringItemType
Balance Type:	na
Period Type:	instant

X

- Details

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

X

- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

+ References

No definition available.

+ Details

Name:	us-gaap_MinorityInterestOwnershipPercentageByParent
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant