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Equity Method and Other Investments (Equity Method Investments) (Narrative) (Details) - USD ($)
 12 Months Ended
Sep. 28, 2025
Sep. 29, 2024
Oct. 01, 2023
Schedule of Equity Method Investments [Line Items]      
Related product and distribution costs $ 57,700,000 $ 58,600,000 $ 85,600,000
Revenue From Related Parties 58,100,000 62,600,000 $ 85,700,000
Increase (Decrease) in Due from Affiliates, Current 17,300,000 12,200,000  
Equity Method Investments $ 418,900,000 424,100,000  
North American Coffee Partnership [Member]      
Schedule of Equity Method Investments [Line Items]      
Equity Method Investment, Ownership Percentage 50.00%    
Equity Method Investments - Carrying Value $ 74,000,000 112,300,000  
Equity Method Investments - Carrying Value $ 74,000,000 112,300,000  
Tata Starbucks Limited (India) [Member]      
Schedule of Equity Method Investments [Line Items]      
Equity Method Investment, Ownership Percentage 50.00%    
Equity Method Investments - Carrying Value $ 39,300,000 41,100,000  
Equity Method Investments - Carrying Value 39,300,000 41,100,000  
Valor Siren Ventures I, II L.P.      
Schedule of Equity Method Investments [Line Items]      
Equity Method Investments - Carrying Value 242,400,000 211,900,000  
Equity Method Investments - Carrying Value $ 242,400,000 $ 211,900,000