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Inventories (Narrative) (Details)
In Millions, unless otherwise specified
 3 Months Ended
Dec. 28, 2014
JPY (¥)
Dec. 28, 2014
Coffee Contracts [Member]
USD ($)
Sep. 28, 2014
Coffee Contracts [Member]
USD ($)
Dec. 28, 2014
Fixed Price Contract [Member]
USD ($)
Dec. 28, 2014
Price-to-be-fixed Contract [Member]
USD ($)
Dec. 28, 2014
Future [Member]
Price-to-be-fixed Contract [Member]
USD ($)
Dec. 28, 2014
Collar Instruments [Member]
Price-to-be-fixed Contract [Member]
USD ($)
Amount of coffee committed to be purchased       $ 564us-gaap_LongTermPurchaseCommitmentAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= sbux_FixedPriceContractMember		 $ 416us-gaap_LongTermPurchaseCommitmentAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= sbux_PriceToBeFixedContractMember		    
Notional amounts of outstanding derivative contracts ¥ 73,500invest_DerivativeNotionalAmount $ 32invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= sbux_CoffeeContractsMember		 $ 45invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= sbux_CoffeeContractsMember		     $ 15invest_DerivativeNotionalAmount
/ us-gaap_DerivativeByNatureAxis
= us-gaap_FutureMember
/ us-gaap_DerivativeInstrumentRiskAxis
= sbux_PriceToBeFixedContractMember		 $ 17invest_DerivativeNotionalAmount
/ us-gaap_DerivativeByNatureAxis
= sbux_CollarInstrumentsMember
/ us-gaap_DerivativeInstrumentRiskAxis
= sbux_PriceToBeFixedContractMember