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Summary of Significant Accounting Policies (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
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		    
Impact to shareholders' equity from stock split $ 0sbux_StockholdersEquityNoteStockSplitAccumulatedImpactonStockholdersEquity
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember