Property and Equipment (Property and Equipment) (Details) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 287.0	$ 292.8
Long-term notes receivable	902.2	1,012.8
Other property and equipment
Property, Plant and Equipment [Line Items]
Accumulated depreciation	(278.5)	(207.3)
Long-term notes receivable	301.6	387.7
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	35.0	43.0
Buildings and leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	179.7	206.3
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	39.8	36.2
Transportation equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	4.4	5.0
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 34.2	$ 11.7