Derivatives - Schedule of Pre-Tax Losses (Gains) Recognized on Derivative Financial Instruments in Condensed Consolidated Statements of Operations (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Not Designated as Hedging Instrument | Foreign Currency Contracts | Selling, General and Administrative Expenses
Derivative Instruments Gain Loss [Line Items]
Gain related to derivatives	$ (6.3)	$ 4.3	$ (5.2)	$ 2.8
Designated as Hedging Instrument | Derivatives Designated as Cash Flow Hedges | Interest Rate Swap Agreements | Interest Expense, Net
Derivative Instruments Gain Loss [Line Items]
Gain related to derivatives	$ 1.3		$ 2.1