Supplemental Balance Sheet Information (Property, Plant And Equipment, net) (Details) - USD ($) $ in Millions	Jun. 26, 2016	Sep. 27, 2015
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 10,301.8	$ 9,641.8
Accumulated depreciation	(5,942.6)	(5,553.5)
Property, plant and equipment, net	4,359.2	4,088.3
Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	46.6	46.6
Buildings [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	443.7	411.5
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	5,697.9	5,409.6
Store Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,851.3	1,707.5
Roasting Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	593.1	542.4
Furniture, Fixtures and Other [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,376.4	1,281.7
Work in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 292.8	$ 242.5