Supplemental Balance Sheet Information (Property, Plant and Equipment, net) (Details) - USD ($) $ in Millions	Sep. 29, 2024	Oct. 01, 2023
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 19,441.0	$ 17,310.2
Accumulated depreciation	(10,775.5)	(9,923.1)
Property, plant and equipment, net	8,665.5	7,387.1
Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	56.9	46.1
Building [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	684.8	666.5
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	11,453.9	10,133.7
Store equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	3,803.6	3,332.5
Roasting equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	865.7	859.4
Software and Software Development Costs
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,049.7	897.2
Furniture, fixtures and other [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	775.5	767.3
Work in progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 750.9	$ 607.5