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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
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Derivative Instruments, Gain (Loss) [Line Items]      
Gain (loss) on derivatives $ (127) $ (25) $ 10
Seed Investment [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Gain (loss) on derivatives (230) (48) (112)
Deferred Cash Compensation Plans [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Gain (loss) on derivatives $ 31 $ 18 $ 24