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Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Detail) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, Gross $ 464.5 $ 429.5
Accumulated depreciation (253.7) (230.8)
Property, plant and equipment, Net 210.8 198.7
Land [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, Gross 21.6 19.8
Buildings [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, Gross 65.5 60.0
Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, Gross 349.9 330.7
Work in Progress [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, Gross $ 27.5 $ 19.0