Derivative Instruments and Hedging Activities - Derivative Instruments Not Designated as Hedging Instruments (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Derivatives Not Designated as Hedges [Member] | Foreign Exchange Forward Contracts [Member] | Location, Statement of Income, Balance [Axis]: us-gaap:OtherNonoperatingIncomeExpense
Derivative Instruments Gain Loss [Line Items]
Losses from derivative instruments not designated as hedging instruments	$ (12.1)	$ 9.3	$ (12.9)	$ (2.1)