Property, Plant and Equipment, Net - Schedule of Depreciation Expense and Repair and Maintenance Expense (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Property Plant And Equipment [Abstract]
Depreciation expense included in cost of sales	$ 41.4	$ 45.0	$ 29.9
Depreciation expense included in selling, general and administrative expenses	1.3	1.2	0.6
Total depreciation expense	42.7	46.2	30.5
Repair and maintenance expense	$ 44.6	$ 45.6	$ 34.0