v2.4.1.9
Derivative Financial Instruments Derivative Financial Instruments (Narrative) (Details)
In Millions, unless otherwise specified
 3 Months Ended 6 Months Ended 6 Months Ended
Mar. 29, 2015
USD ($)
Mar. 30, 2014
USD ($)
Mar. 29, 2015
USD ($)
Mar. 30, 2014
USD ($)
Mar. 29, 2015
Starbucks Coffee Japan Ltd Member
USD ($)
Sep. 28, 2014
Starbucks Coffee Japan Ltd Member
Dec. 28, 2014
Interest Rate Swap [Member]
USD ($)
Mar. 29, 2015
Reclassification out of Accumulated Other Comprehensive Income [Member]
Net Investment Hedging [Member]
USD ($)
Mar. 30, 2014
Reclassification out of Accumulated Other Comprehensive Income [Member]
Net Investment Hedging [Member]
USD ($)
Mar. 29, 2015
Reclassification out of Accumulated Other Comprehensive Income [Member]
Net Investment Hedging [Member]
Starbucks Coffee Japan Ltd Member
USD ($)
Mar. 29, 2015
Cross-Currency Swap [Member]
USD ($)
Mar. 29, 2015
Cross-Currency Swap [Member]
JPY (¥)
Sep. 28, 2014
Cross-Currency Swap [Member]
USD ($)
Derivative Instruments and Hedging Activities Disclosures [Line Items]                          
Derivative, Notional Amount             $ 250invest_DerivativeNotionalAmount
/ us-gaap_DerivativeByNatureAxis
= us-gaap_InterestRateSwapMember		       $ 618invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_CrossCurrencyInterestRateContractMember		 ¥ 73,500invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_CrossCurrencyInterestRateContractMember		 $ 0invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_CrossCurrencyInterestRateContractMember
Gain resulting from acquisition of joint venture $ 0us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain $ 0us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain $ 390.6us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain $ 0us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain $ 390.6us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain
/ us-gaap_BusinessAcquisitionAxis
= sbux_StarbucksCoffeeJapanLtdMember		     $ 7.2us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NetInvestmentHedgingMember		 [1] $ 0us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NetInvestmentHedgingMember		 [1] $ 7.2us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain
/ us-gaap_BusinessAcquisitionAxis
= sbux_StarbucksCoffeeJapanLtdMember
/ us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis
= us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NetInvestmentHedgingMember		      
Preexisting ownership percentage in Starbucks Japan           39.50%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_BusinessAcquisitionAxis
= sbux_StarbucksCoffeeJapanLtdMember		              
[1] Release of pretax cumulative net gains in AOCI related to our net investment derivative instruments used to hedge our preexisting 39.5% equity method investment in Starbucks Japan.