Fair Value Disclosures - Measured on a Nonrecurring Basis (Details) - Nonrecurring - Level 3 - USD ($) $ in Millions |
9 Months Ended | ||
|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Dec. 31, 2025 |
|
| Total loans and leases, including loans transferred to LHFS | |||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | |||
| Carrying value, Total loans and leases, including loans transferred to LHFS | $ 566 | $ 472 | |
| Valuation adjustments | (811) | $ (692) | |
| Other | |||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | |||
| Carrying value, other | 25 | $ 65 | |
| Valuation adjustments | $ (244) | $ (229) | |