Supplemental Balance Sheet Information (Property, Plant And Equipment, net) (Details) - USD ($) $ in Millions	Jul. 03, 2022	Oct. 03, 2021
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 15,380.0	$ 14,828.8
Accumulated depreciation	(8,971.8)	(8,459.3)
Property, plant and equipment, net	6,408.2	6,369.5
Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	46.1	46.2
Buildings [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	562.8	587.6
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	8,882.1	8,637.6
Store Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	2,953.6	2,934.1
Roasting Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	892.2	857.2
Furniture, Fixtures and Other [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,464.3	1,392.0
Work in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 578.9	$ 374.1