Derivatives and Hedging Activity - Summary of Notional and Fair Values of Derivative Instruments (Parenthetical) (Detail) - Foreign Exchange Contracts [Member] - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Call Options [Member]
Derivatives, Fair Value [Line Items]
Foreign exchange derivative contracts	$ 331.3	$ 948.8
Put Options [Member]
Derivatives, Fair Value [Line Items]
Foreign exchange derivative contracts	331.3	948.8
Forward Contracts [Member] | Call Options [Member]
Derivatives, Fair Value [Line Items]
Foreign exchange derivative contracts	73.3	125.4
Forward Contracts [Member] | Put Options [Member]
Derivatives, Fair Value [Line Items]
Foreign exchange derivative contracts	$ 5.5	$ 12.4