Supplemental Balance Sheet Information (Property, Plant and Equipment, net) (Details) (USD $) In Millions, unless otherwise specified	Sep. 28, 2014	Sep. 29, 2013
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 8,581.1	$ 7,782.1
Accumulated depreciation	(5,062.1)	(4,581.6)
Property, plant and equipment, net	3,519.0	3,200.5
Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	46.7	47.0
Buildings [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	278.1	259.6
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	4,858.4	4,431.6
Store equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,493.3	1,353.9
Roasting equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	410.9	397.9
Furniture, fixtures and other[Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,078.1	949.7
Work in progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 415.6	$ 342.4