Property and Equipment (Tables)

12 Months Ended

Dec. 31, 2016

Property, Plant and Equipment [Abstract]

Schedule of property and equipment

The amount of property and equipment and their respective estimated useful lives are as follows (in millions, except estimated useful lives):

	As of December 31,				Estimated
	2016		2015		Useful Lives
Land	$	27.4	$	31.6	Indefinite
Buildings and leasehold improvements	87.3		41.2		3 - 40 years
Office equipment, furniture and fixtures	15.4		14.1		3 - 10 years
Computer equipment and software costs	140.7		118.9		3 - 10 years
Machinery, equipment and vehicles	217.5		160.1		3 - 40 years
	488.3		365.9
Accumulated depreciation and amortization	177.1		140.3
	$	311.2	$	225.6

Schedule of amount of computer software costs, including capitalized internally developed software costs

The amount of computer software costs, including capitalized internally developed software costs are as follows (in millions):

	As of December 31,
	2016		2015
Computer software costs	$	94.5	$	91.4
Accumulated amortization	69.5		55.8
Computer software costs, net	$	25.0	$	35.6

Schedule of assets and accumulated amortization recorded under capital leases

The assets and accumulated amortization recorded under capital leases are as follows (in millions):

	As of December 31,
	2016		2015
Capital leases	$	24.4	$	23.0
Accumulated amortization	8.2		11.0
Capital leases, net	$	16.2	$	12.0