Derivatives - Schedule of Pre-Tax (Gains) Losses Recognized on Derivative Financial Instruments in Consolidated Statements of Operations (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Not Designated as Hedging Instrument | Foreign Currency Contracts | Selling, General and Administrative Expenses
Derivative Instruments Gain Loss [Line Items]
Gain related to derivatives	$ (13.6)	$ 1.5	$ 2.0
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	$ 3.4	$ (0.1)