v2.4.0.8

Basis of Presentation and Summary of Significant Accounting Policies (Details)	3 Months Ended		12 Months Ended
	Mar. 28, 2014	Sep. 27, 2013	Jun. 27, 2014	Jun. 28, 2013
Variable Interest Entity [Line Items]
Number Of Weeks In Fiscal Year Low End Of Range			52	P52W
Number Of Weeks In Fiscal Year High End Of Range			53	P53W
Number Of Weeks In Quarter	P39W	13		P52W
Number of Weeks in Fiscal Year			52

X

- Definition

Disclosure of the number of weeks of financial results included in the entity's fiscal year.

+ References

No definition available.

+ Details

Name:	stx_NumberOfWeeksInFiscalYear
Namespace Prefix:	stx_
Data Type:	us-types:durationStringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Disclosure of the high end of the range of the number of weeks in certain of the entity's fiscal years.

+ References

No definition available.

+ Details

Name:	stx_NumberOfWeeksInFiscalYearHighEndOfRange
Namespace Prefix:	stx_
Data Type:	us-types:durationStringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Disclosure of the low end of the range of the number of weeks in certain of the entity's fiscal years.

+ References

No definition available.

+ Details

Name:	stx_NumberOfWeeksInFiscalYearLowEndOfRange
Namespace Prefix:	stx_
Data Type:	us-types:durationStringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Disclosure of the number of weeks of financial results included in the entity's quarter.

+ References

No definition available.

+ Details

Name:	stx_NumberOfWeeksInQuarter
Namespace Prefix:	stx_
Data Type:	us-types:durationStringItemType
Balance Type:	na
Period Type:	duration

X

- Details

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