Location of Gains and Losses on Derivative Instruments Designated as Cash Flow Hedging Instruments (Detail) - Designated as Hedging Instrument - Cash Flow Hedging - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Derivative Instruments, Gain (Loss)
Gain (Loss) Recognized in Other Comprehensive Income (Loss) on Derivatives	$ (71.5)	$ (49.9)	$ (39.0)	$ (101.8)
Forwards
Derivative Instruments, Gain (Loss)
Gain (Loss) Recognized in Other Comprehensive Income (Loss) on Derivatives	(66.1)	(50.5)	(34.6)	(105.6)
Foreign Exchange Contracts
Derivative Instruments, Gain (Loss)
Gain (Loss) Recognized in Other Comprehensive Income (Loss) on Derivatives	$ (5.4)	$ 0.6	$ (4.4)	$ 3.8