v2.4.0.6

Derivative Financial Instruments (Details) (USD $) In Millions, unless otherwise specified | Mar. 30, 2012 | Jul. 01, 2011
--- | --- | ---
Derivative Financial Instruments |  |
Net unrealized gains (losses) on cash flow hedges | $ (1) | $ 2
Derivative Financial Instruments |  |
Remaining maturity of foreign currency forward exchange contracts (in months) | 12 months |
Deferred amount recorded in accumulated other comprehensive income (loss) expected to be recognized into earnings over the next 12 months | (1) |
Derivatives designated as hedging instruments | Foreign currency forward exchange contracts |  |
Derivative Financial Instruments |  |
Notional value of outstanding foreign currency forward exchange contracts | 64 | 388
Derivatives designated as hedging instruments | Foreign currency forward exchange contracts | Thai baht |  |
Derivative Financial Instruments |  |
Notional value of outstanding foreign currency forward exchange contracts |  | 98
Derivatives designated as hedging instruments | Foreign currency forward exchange contracts | Singapore dollars |  |
Derivative Financial Instruments |  |
Notional value of outstanding foreign currency forward exchange contracts | 50 | 212
Derivatives designated as hedging instruments | Foreign currency forward exchange contracts | Chinese Renminbi |  |
Derivative Financial Instruments |  |
Notional value of outstanding foreign currency forward exchange contracts | 14 | 78
Derivatives not designated as hedging instruments | Foreign currency forward exchange contracts |  |
Derivative Financial Instruments |  |
Notional value of outstanding foreign currency forward exchange contracts | 148 | 255
Derivatives not designated as hedging instruments | Foreign currency forward exchange contracts | Thai baht |  |
Derivative Financial Instruments |  |
Notional value of outstanding foreign currency forward exchange contracts | 123 | 235
Derivatives not designated as hedging instruments | Foreign currency forward exchange contracts | Singapore dollars |  |
Derivative Financial Instruments |  |
Notional value of outstanding foreign currency forward exchange contracts | 10 | 9
Derivatives not designated as hedging instruments | Foreign currency forward exchange contracts | Czech koruna |  |
Derivative Financial Instruments |  |
Notional value of outstanding foreign currency forward exchange contracts | $ 15 | $ 11

X
- Definition Amount of unrealized gain (loss) related to the increase (decrease) in fair value of foreign currency derivatives designated as cash flow hedging instruments, which was recorded in accumulated other comprehensive income to the extent that the cash flow hedge was determined to be effective. + References No definition available. + Details
Name: | stx_UnrealizedGainLossOnForeignCurrencyCashFlowHedgesPretaxAccumulatedOtherComprehensiveIncome
Namespace Prefix: | stx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_DerivativeLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The estimated net amount of unrealized gains or losses on foreign currency cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 45 -Subparagraph b(2) -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 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6887037&loc=d3e80748-113994 + Details
Name: | us-gaap_ForeignCurrencyCashFlowHedgeGainLossToBeReclassifiedDuringNext12Months
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Maximum amount of time remaining before foreign currency exchange rate derivatives mature or expire. + References No definition available. + Details
Name: | us-gaap_MaximumRemainingMaturityOfForeignCurrencyDerivatives
Namespace Prefix: | us-gaap_
Data Type: | us-types:durationStringItemType
Balance Type: | na
Period Type: | instant

X
- Definition Aggregate notional amount of all derivatives. The notional amount relates to a number of currency units, shares, bushels, pounds, or other units specified in a derivative instrument. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Notional Amount -URI http://asc.fasb.org/extlink&oid=6519104 + Details
Name: | us-gaap_NotionalAmountOfDerivatives
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant