PROPERTY, PLANT, AND EQUIPMENT, NET (Tables)

12 Months Ended

Dec. 31, 2019

Property, Plant and Equipment [Abstract]

Schedule of property, plant and equipment

Property, plant, and equipment are stated at cost, less accumulated depreciation. Depreciation is computed using the straight-line method over the estimated useful lives of the assets. The useful lives are as follows:

Category	Useful Life (in years)
Leasehold improvements (1)	Various
Buildings	35-60
Building improvements	5-25
Office equipment	3-10
Software	3-10
Machinery and equipment	4-12

(1)

Leasehold improvements are amortized over the shorter of the economic life of the asset or the remaining lease term.

Property, plant and equipment, net consisted of the following as of the dates presented (in millions):

	December 31,
	2019			2018
Land	$	16.0		$	12.0
Leasehold improvements	62.9			59.6
Buildings	71.9			68.9
Office equipment	27.2			19.5
Software	71.2			43.4
Machinery and equipment	236.4			237.2
Construction-in-progress	35.0			52.7
Property, plant and equipment	520.6			493.3
Accumulated depreciation	(281.6		)	(278.3		)
Property, plant, and equipment, net	$	239.0		$	215.0