Fair Value Measurements - Total Gains and Losses Included in Earning Attributable to Changes in Unrealized Gains and Losses Related to Level 3 Assets and Liabilities Still Held at Year End (Details) - Level 3 - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis | ||||
| Gain and losses included in earnings | $ (19) | $ (12) | $ (68) | $ (2) |
| Mortgage banking net revenue | ||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis | ||||
| Gain and losses included in earnings | (19) | 10 | (50) | 37 |
| Capital markets fees | ||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis | ||||
| Gain and losses included in earnings | 1 | 1 | 1 | 1 |
| Other noninterest income | ||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis | ||||
| Gain and losses included in earnings | $ (1) | $ (23) | $ (19) | $ (40) |