Derivatives and Hedging - Summary of Realized and Unrealized Gains (Losses) Recognized in Condensed Consolidated Statements of Income on Derivative Instruments (Parenthetical) (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives	$ 51	$ (37)
Seed Investment [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives	10	(43)
Deferred Cash Compensation Plans [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives	$ (6)	$ 11