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Acquisitions and Divestitures (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended
Jun. 30, 2019
Jun. 28, 2020
Sep. 29, 2019
Business Acquisition [Line Items]      
Goodwill   $ 3,510.1 $ 3,490.8
Finite-Lived Intangible Assets, Accumulated Amortization   771.2 603.0
Starbucks Coffee Thailand [Member]      
Business Acquisition [Line Items]      
Deconsolidation, Gain (Loss), Amount $ 601.9    
Acquired and reacquired rights      
Business Acquisition [Line Items]      
Finite-Lived Intangible Assets, Accumulated Amortization   $ 693.5 $ 537.2