Property and Equipment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 1,555.5	$ 1,746.4
Accumulated depreciation and amortization	(1,006.5)	(1,076.9)
Property and equipment, net	549.0	669.5
Amortization	20.7	20.3	$ 17.8
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	56.3	62.7
Buildings
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	192.8	231.2
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	181.3	199.8
Vehicles
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	369.4	396.5
Capitalized software(a)
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	183.6	183.0
Other machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 572.1	$ 673.2