Derivatives - Schedule of Fair Values of Derivative Financial Instruments (Detail) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Not Designated as Hedging Instrument | Accrued Liabilities and Other | Foreign Currency Contracts
Derivatives Fair Value [Line Items]
Derivative liabilities	$ 0.1	$ 2.3
Not Designated as Hedging Instrument | Prepaid Expenses and Other Current Assets | Foreign Currency Contracts
Derivatives Fair Value [Line Items]
Derivative assets	1.7	5.9
Designated as Hedging Instrument | Derivatives Designated as Cash Flow Hedges | Accrued Liabilities and Other | Interest Rate Swap Agreements
Derivatives Fair Value [Line Items]
Derivative liabilities	1.2	5.0
Designated as Hedging Instrument | Derivatives Designated as Cash Flow Hedges | Other Noncurrent Liabilities | Interest Rate Swap Agreements
Derivatives Fair Value [Line Items]
Derivative liabilities	$ 1.0	$ 9.6