Derivatives and Hedging Activities - Pretax Impact of Foreign Currency Forward Contracts, Both Matured and Outstanding, not Designated as Hedging Instruments (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Other Expense, Net [Member] | Foreign Currency Contracts [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other income (expense), net	$ 2.8	$ (19.0)	$ (2.6)