Franchise Arrangements - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Franchisor Disclosure [Line Items]
Franchise arrangement period	20 years
Net property and equipment	$ 22,834.5	$ 22,060.6
Land	5,328.3	5,200.5
Accumulated depreciation and amortization of property and equipment	12,903.1	12,421.8
Franchise Arrangements
Franchisor Disclosure [Line Items]
Net property and equipment	13,800.0
Land	4,000.0
Accumulated depreciation and amortization of property and equipment	$ 7,100.0

The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

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- Definition

Tangible assets that are held by an entity for use in the production or supply of goods and services, for rental to others, or for administrative purposes and that are expected to provide economic benefit for more than one year; net of accumulated depreciation. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

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