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Other Assets - Additional Information (Detail) - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
iCapital [Member]    
Other Assets [Line Items]    
Carrying value - equity method investment $ 685 $ 652
Percentage of strategic minority investment 23.00% 24.00%
Other Assets [Member]    
Other Assets [Line Items]    
Carrying value - equity method investment $ 933 $ 888
Other non equity method corporate minority investments $ 456 $ 438