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 of expense for amortization of capitalized computer software costs.

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Property and Equipment (Details) - USD ($) $ in Millions	12 Months Ended
Property and Equipment (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 1,868.6	$ 1,806.9
Accumulated depreciation and amortization	(1,169.2)	(1,166.0)
Property and equipment, net	699.4	640.9
Amortization	16.5	20.5	$ 19.6
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	51.7	56.7
Buildings
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	199.9	220.5
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	219.7	205.5
Vehicles
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	568.4	490.9
Capitalized software(a)
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	203.4	199.3
Other machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 625.5	$ 634.0