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Plant, Property and Equipment, Net - Components of Plant, Property and Equipment, Net (Detail) - USD ($)
$ in Millions
Dec. 31, 2017
Dec. 31, 2016
Property, Plant and Equipment [Abstract]    
Land and improvements $ 28.7 $ 28.2
Machinery and equipment 1,039.9 898.6
Buildings and improvements 262.5 244.6
Furniture, fixtures and office equipment 74.5 68.0
Construction work in progress 58.4 68.5
Other 10.9 5.3
Plant, property and equipment, gross 1,474.9 1,313.2
Less - accumulated depreciation (953.2) (848.7)
Plant, property and equipment, net $ 521.7 $ 464.5