Supplemental Balance Sheet Information (Property, Plant And Equipment, net) (Details) - USD ($) $ in Millions	Jan. 02, 2022	Oct. 03, 2021
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 15,086.1	$ 14,828.8
Accumulated depreciation	(8,688.1)	(8,459.3)
Property, plant and equipment, net	6,398.0	6,369.5
Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	46.2	46.2
Buildings [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	582.1	587.6
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	8,739.5	8,637.6
Store Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	2,981.9	2,934.1
Roasting Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	893.4	857.2
Furniture, Fixtures and Other [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,422.9	1,392.0
Work in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 420.1	$ 374.1