v3.26.1
Loans - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2026
Mar. 31, 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%   95.00%
Increase (decrease) in allowance for credit loss $ 258 $ (125)