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Derivatives and Hedging Activity - Summary of Notional and Fair Values of Derivative Instruments (Parenthetical) (Detail) - Foreign Exchange Contracts [Member] - USD ($)
$ in Millions
Sep. 30, 2024
Dec. 31, 2023
Call Options [Member]    
Derivatives, Fair Value [Line Items]    
Foreign exchange derivative contracts $ 726.6 $ 331.3
Put Options [Member]    
Derivatives, Fair Value [Line Items]    
Foreign exchange derivative contracts 726.6 331.3
Forward Contracts [Member] | Call Options [Member]    
Derivatives, Fair Value [Line Items]    
Foreign exchange derivative contracts 36.9 73.3
Forward Contracts [Member] | Put Options [Member]    
Derivatives, Fair Value [Line Items]    
Foreign exchange derivative contracts $ 2.0 $ 5.5