Property and Equipment, Net (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 2,921.9	$ 2,707.5
Less: accumulated depreciation and amortization	(826.8)	(756.8)
Property and equipment, net	2,095.1	1,950.7
Interest Costs Capitalized	0.6	1.0	1.2
Land [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	924.6	867.1
Buildings and improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	1,451.5	1,321.8
Furniture, fixtures, and equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 545.8	$ 518.6

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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Gross amount of long-lived 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, furniture and fixtures, and computer equipment.

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- Definition

Amount, net of accumulated depreciation, depletion and amortization, of long-lived 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, furniture and fixtures, and computer equipment.

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