Plant, Property and Equipment, Net - Components of Plant, Property and Equipment, Net (Detail) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Abstract]
Land and improvements	$ 25.4	$ 24.0
Machinery and equipment	909.3	870.3
Buildings and improvements	242.0	228.8
Furniture, fixtures and office equipment	66.3	65.8
Construction work in progress	42.3	44.5
Other	6.7	7.8
Plant, property and equipment, gross	1,292.0	1,241.2
Less - accumulated depreciation	(848.5)	(797.3)
Plant, property and equipment, net	$ 443.5	$ 443.9