v3.26.1
Loans - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Loans Receivable [Line Items]          
Impact of applying other methodology, change to loans receivable         $ 4,540
Percentage of loans that were rated pass/non-criticized 96.00%   96.00%   95.00%
Increase (decrease) in allowance for credit loss $ (178) $ 71 $ 80 $ (54)