Supplemental Balance Sheet Information (Property, Plant And Equipment, Net) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Sep. 30, 2012
Balance Sheet Related Disclosures [Abstract]
Land	$ 47.0	$ 46.2
Buildings	258.6	225.2
Leasehold improvements	4,252.5	3,957.6
Store equipment	1,292.4	1,251.0
Roasting equipment	390.3	322.8
Furniture, fixtures and other	888.4	836.2
Work in progress	330.9	264.1
Property, plant and equipment, gross	7,460.1	6,903.1
Less accumulated depreciation	(4,473.0)	(4,244.2)
Property, plant and equipment, net	$ 2,987.1	$ 2,658.9

Carrying amount as of the balance sheet date of roasting equipment

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Carrying amount as of the balance sheet date of long-lived, depreciable assets used in company-operated stores.

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Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation of building structures held for productive use including addition, improvement, or renovation to the structure, including, but not limited to, interior masonry, interior flooring, electrical, and plumbing.

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Amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service.

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Amount before accumulated depreciation of equipment commonly used in offices and stores that have no permanent connection to the structure of a building or utilities. Examples include, but are not limited to, desks, chairs, tables, and bookcases.

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Amount before accumulated depletion of real estate held for productive use, excluding land held for sale.

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Amount before accumulated depreciation of additions or improvements to assets held under a lease arrangement.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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