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Fair Value Measurements - Total Gains and Losses Included in Earnings for Assets and Liabilities Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs (Details) - Level 3 - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |  |
Gains and losses included in earnings | $ (37) | $ (112) | $ (124) | $ (157)
Mortgage banking net revenue |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |  |
Gains and losses included in earnings | (19) | (66) | (89) | (71)
Capital markets fees |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |  |
Gains and losses included in earnings | 0 | 1 | 2 | 2
Other noninterest income |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |  |  |
Gains and losses included in earnings | $ (18) | $ (47) | $ (37) | $ (88)

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