Plant, Property and Equipment, Net - Components of Plant, Property and Equipment, Net (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Machinery and equipment	$ 1,205.7	$ 1,128.9
Buildings and improvements	273.9	279.3
Furniture, fixtures and office equipment	82.0	79.8
Construction work in progress	44.7	48.8
Land and improvements	34.6	33.3
Other	5.0	10.5
Plant, property and equipment, gross	1,645.9	1,580.6
Less: accumulated depreciation	(1,120.8)	(1,049.1)
Plant, property and equipment, net	525.1	531.5
Depreciation expense	$ 83.2	$ 84.1	$ 82.8
Machinery and Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	2 years
Machinery and Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	10 years
Building and Building Improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	5 years
Building and Building Improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	40 years
Furniture and Fixtures [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Furniture and Fixtures [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	7 years