Derivative Instruments and Hedging Activities - Derivative Instruments Not Designated as Hedging Instruments (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Derivatives Not Designated as Hedges [Member] | Foreign Exchange Forward Contracts [Member] | Other income, net [Member]
Derivative Instruments Gain Loss [Line Items]
Gains from derivative instruments not designated as hedging instruments	$ 9.3	$ (10.7)	$ (2.1)	$ 10.5