Inventories (Components of Inventory) (Details) - USD ($) $ in Millions		Mar. 30, 2025	Sep. 29, 2024
Inventory Disclosure [Abstract]
Unroasted		$ 950.4	$ 665.1
Roasted		274.0	251.9
Other merchandise held for sale	[1]	322.4	384.6
Packaging and other supplies		500.5	475.7
Total		$ 2,047.3	$ 1,777.3

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