v3.26.1
Deposits - Additional Information (Detail) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Deposit Liability [Line Items]    
Deposits at fair value $ 92,248 $ 76,569
U.S.    
Deposit Liability [Line Items]    
Time deposits, at or above FDIC insurance limit 41,590  
Non-U.S.    
Deposit Liability [Line Items]    
Time deposits, at or above FDIC insurance limit $ 58,390