Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2020

Property, Plant and Equipment [Abstract]

Components of property, plant and equipment

Depreciation is computed using the straight-line method over the following estimated useful lives:

Buildings and improvements:
Buildings and improvements	2 to 40 years
Leasehold improvements	1 to 39 years
Machinery and equipment:
Computer hardware	3 to 5 years
Computer software	3 to 10 years
Factory machinery and equipment	1 to 15 years
Research and development equipment	3 to 5 years
Vehicles	3 to 10 years

Components of Property, plant and equipment, net were as follows (in millions):

	As of December 31,
	2020		2019
Land	$	24.0	$	23.7
Buildings and improvements	266.1		242.9
Machinery and equipment	928.0		883.4
Finance leases	57.1		47.2
Construction in progress and equipment not yet in service	69.7		72.5
Total	1,344.9		1,269.7
Less accumulated depreciation	(880.6)		(824.3)
Property, plant and equipment, net	$	464.3	$	445.4