Loans - Schedule of Forecasted Economic Scenarios (Detail) - Forecast - United States |
Dec. 31, 2028 |
Dec. 31, 2027 |
Sep. 30, 2027 |
Jun. 30, 2027 |
Dec. 31, 2026 |
|---|---|---|---|---|---|
| Schedule Of Forecasted Economic Scenarios [Line Items] | |||||
| Maximum estimated unemployment rate | 7.40% | ||||
| Maximum decline in gross domestic rate relative to expected rate | 2.70% | ||||
| Maximum estimated unemployment rate, multi-scenario forecast | 5.50% | ||||
| Maximum decline in gross domestic rate relative to expected rate, multi-scenario forecast | 1.70% | ||||
| U.S. unemployment rate | |||||
| Schedule Of Forecasted Economic Scenarios [Line Items] | |||||
| Allowance for credit losses forecast model inputs | 4.50% | 4.60% | 4.70% | ||
| U.S. GDP rate | |||||
| Schedule Of Forecasted Economic Scenarios [Line Items] | |||||
| Allowance for credit losses forecast model inputs | 1.90% | 1.80% | 1.90% |