Supplemental Balance Sheet Information (Property, Plant And Equipment, net) (Details) - USD ($) $ in Millions	Jun. 29, 2025	Sep. 29, 2024
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 20,319.8	$ 19,441.0
Accumulated depreciation	(11,426.1)	(10,775.5)
Property, plant and equipment, net	8,893.7	8,665.5
Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	56.9	56.9
Buildings [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	680.0	684.8
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	11,980.7	11,453.9
Store Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	4,026.0	3,803.6
Roasting Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	937.6	865.7
Software and Software Development Costs
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,149.6	1,049.7
Furniture, Fixtures and Other [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	887.8	775.5
Work in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 601.2	$ 750.9