v3.26.1
Deposits - Additional Information (Detail) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Deposit Liability [Line Items]    
Deposits at fair value $ 90,249 $ 76,569
U.S.    
Deposit Liability [Line Items]    
Time deposits, at or above FDIC insurance limit 43,020  
Non-U.S.    
Deposit Liability [Line Items]    
Time deposits, at or above FDIC insurance limit $ 52,820