Annual report pursuant to Section 13 and 15(d)

Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Detail)

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Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Property, Plant and Equipment [Line Items]    
Property, plant and equipment $ 245.6 $ 221.9
Accumulated depreciation (97.8) (79.0)
Property, plant and equipment, net 147.8 142.9
Land Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment $ 4.4 3.6
Land Improvements [Member] | Minimum [Member]    
Property, Plant and Equipment [Line Items]    
Useful life 12 years  
Land Improvements [Member] | Maximum [Member]    
Property, Plant and Equipment [Line Items]    
Useful life 20 years  
Building and Building Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment $ 32.6 29.9
Building and Building Improvements [Member] | Minimum [Member]    
Property, Plant and Equipment [Line Items]    
Useful life 20 years  
Building and Building Improvements [Member] | Maximum [Member]    
Property, Plant and Equipment [Line Items]    
Useful life 50 years  
Machinery and Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment $ 195.2 175.3
Machinery and Equipment [Member] | Minimum [Member]    
Property, Plant and Equipment [Line Items]    
Useful life 3 years  
Machinery and Equipment [Member] | Maximum [Member]    
Property, Plant and Equipment [Line Items]    
Useful life 12 years  
Leasehold Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment $ 2.1 1.7
Construction-in-Process [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment $ 11.3 $ 11.4