Supplemental Balance Sheet Information (Property, Plant and Equipment, net) (Details) - USD ($) $ in Millions	Oct. 02, 2016	Sep. 27, 2015
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 10,573.3	$ 9,641.8
Accumulated depreciation	(6,039.5)	(5,553.5)
Property, plant and equipment, net	4,533.8	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	458.4	411.5
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	5,892.9	5,409.6
Store equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,931.7	1,707.5
Roasting equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	605.4	542.4
Furniture, fixtures and other [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,366.9	1,281.7
Work in progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 271.4	$ 242.5