Inventories (Components of Inventory) (Details) - USD ($) $ in Millions		Jun. 29, 2025	Sep. 29, 2024
Inventory Disclosure [Abstract]
Unroasted		$ 1,063.9	$ 665.1
Roasted		304.5	251.9
Other merchandise held for sale	[1]	344.2	384.6
Packaging and other supplies		546.6	475.7
Total		$ 2,259.2	$ 1,777.3

[1] “Other merchandise held for sale” includes, among other items, food, serveware, and tea. Inventory levels vary due to seasonality, commodity market supply, and price fluctuations.