Derivatives and Hedging Activities - Effect of Derivative Instruments on Condensed Consolidated Statements of Operations (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in Earnings on Derivatives	$ (11.5)	$ (11.1)	$ (20.1)
Designated as Hedging Instruments | Cash Flow Hedge
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in Earnings on Derivatives	0.3	(0.1)	(1.4)
Cost of sales | Designated as Hedging Instruments | Cash Flow Hedge | Foreign Currency Forward Contracts
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in Earnings on Derivatives	0.2	(0.2)	(1.5)
Interest expense, net | Designated as Hedging Instruments | Cash Flow Hedge | Treasury Lock
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in Earnings on Derivatives	0.1	0.1	0.1
Interest expense, net | Designated as Hedging Instruments | Fair Value Hedges | Interest Rate Swaps
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in Earnings on Derivatives	0.5	0.5	0.5
Other (expense) income, net | Not Designated as Hedging Instruments | Foreign Currency Forward Contracts
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in Earnings on Derivatives	$ (12.3)	$ (11.5)	$ (19.2)