Plant, Property and Equipment, Net - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Long Lived Assets Held-for-sale [Line Items]
Proceeds from Sale of Property Held-for-sale	$ 40.0
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property	40.7	$ 0.9	$ 0.9
Depreciation expense	82.8	$ 78.3	$ 74.1
Corporate and Other [Member]
Long Lived Assets Held-for-sale [Line Items]
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property	$ (38.5)