Property and Equipment, Net

12 Months Ended

Dec. 31, 2017

Property, Plant and Equipment [Abstract]

Property and Equipment, Net

Note 6 - Property and Equipment, Net

The following table provides details of property and equipment, net, including property and equipment held under capital leases as of the dates indicated (in millions):

	December 31,
	2017			2016			Estimated Useful Lives (in years)
Land	$	4.6		$	4.6
Buildings and leasehold improvements	26.7			24.2			3-40
Machinery and equipment	1,261.9			997.8			2-20
Office furniture and equipment	149.9			146.1			3-7
Construction in progress	12.5			9.5
Total property and equipment	$	1,455.6		$	1,182.2
Less accumulated depreciation and amortization	(749.1		)	(633.1		)
Property and equipment, net	$	706.5		$	549.1

The gross amount of capitalized internal-use software, which is included within office furniture and equipment, totaled $109.9 million and $107.8 million as of December 31, 2017 and 2016, respectively. Capitalized internal-use software, net of accumulated amortization, totaled $23.5 million and $30.9 million as of December 31, 2017 and 2016, respectively. Depreciation and amortization expense associated with property and equipment for the years ended December 31, 2017, 2016 and 2015 totaled $167.2 million, $143.6 million and $141.3 million, respectively.