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Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Detail) - USD ($)
$ in Millions
Dec. 31, 2016
Dec. 31, 2015
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, Gross $ 251.8 $ 161.0
Less accumulated depreciation (94.4) (85.0)
Property, plant and equipment, Net 157.4 76.0
Land [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, Gross 7.2 6.2
Buildings [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, Gross 37.8 21.6
Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, Gross 192.6 128.0
Work in Progress [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, Gross $ 14.2 $ 5.2