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Employee Stock Plans (Narrative) (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified
0 Months Ended
Apr. 09, 2015
Mar. 29, 2015
Sep. 28, 2014
Class of Stock [Line Items]      
Common stock, par value   $ 0.001us-gaap_CommonStockParOrStatedValuePerShare $ 0.001us-gaap_CommonStockParOrStatedValuePerShare
Stock Options and Restricted Stock Units [Member]      
Statement [Line Items]      
Common stock available for issuance pursuant to future equity-based compensation awards and ESPP   95.1us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
/ us-gaap_AwardTypeAxis
= sbux_StockOptionsAndRestrictedStockUnitsMember
 
Employee Stock Purchase Plan [Member]      
Statement [Line Items]      
Common stock available for issuance pursuant to future equity-based compensation awards and ESPP   14.6us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockMember
 
Subsequent Event [Member]      
Class of Stock [Line Items]      
Stock split conversion ratio 2us-gaap_StockholdersEquityNoteStockSplitConversionRatio1
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
   
Common stock, par value $ 0.001us-gaap_CommonStockParOrStatedValuePerShare
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember