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