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Inventories (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended
Jul. 01, 2018
Oct. 01, 2017
Jul. 02, 2017
Inventory [Line Items]      
Roasted Coffee Inventory $ 267.6 $ 301.1 $ 258.4
Price-to-be-fixed Contract [Member]      
Inventory [Line Items]      
Amount of coffee committed to be purchased 343.0    
Fixed-price Contract [Member]      
Inventory [Line Items]      
Amount of coffee committed to be purchased 843.0    
Coffee Contracts [Member]      
Inventory [Line Items]      
Price-to-be-fixed contracts fixed through use of futures contracts   0.0  
Designated as Hedging Instrument [Member] | Coffee Contracts [Member]      
Inventory [Line Items]      
Derivative Assets 0.0 $ 0.0  
Price-to-be-fixed contracts fixed through use of futures contracts $ 4.0