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Fair Value Measurements - Reconciliation of Assets and Liabilities Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation |  |  |  |  |
Balance, beginning of period | $ 1,593 | $ 1,676 | $ 1,639 | $ 1,685 |
Included in earnings | (37) | (112) | (124) | (157) |
Purchases/originations | 12 | 15 | 35 | 35 |
Sales |  |  |  | (5) |
Settlements | (8) | (4) | 8 | 15 |
Transfers into Level 3 | 1 | 1 | 3 | 3 |
Balance, end of period | 1,561 | 1,576 | 1,561 | 1,576 |
The amount of total (losses) gains for the period included in earnings attributable to the change in unrealized gains or losses relating to assets still held | (27) | (100) | (98) | (120) |
Derivative Assets | 1,837 |  | 1,837 |  | $ 2,472
Derivative Liabilities | 2,055 |  | 2,055 |  | $ 2,798
Unrealized gains or losses included in other comprehensive income for instruments still held | 0 | 0 |  | 0 |
Interest rate contracts | Level 3 |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation |  |  |  |  |
Derivative Assets | 8 | 7 | 8 | 7 |
Derivative Liabilities | 5 | 5 | 5 | 5 |
Servicing Rights |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation |  |  |  |  |
Balance, beginning of period | 1,629 | 1,731 | 1,704 | 1,737 |
Included in earnings | (40) | (90) | (139) | (112) |
Purchases/originations | 12 | 15 | 36 | 36 |
Sales |  |  |  | (5) |
Settlements | 0 | 0 | 0 | 0 |
Transfers into Level 3 | 0 | 0 | 0 | 0 |
Balance, end of period | 1,601 | 1,656 | 1,601 | 1,656 |
The amount of total (losses) gains for the period included in earnings attributable to the change in unrealized gains or losses relating to assets still held | (19) | (66) | (76) | (44) |
Interest rate contracts |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation |  |  |  |  |
Balance, beginning of period | 2 | 0 | (3) | 0 |
Included in earnings | 19 | 18 | 47 | 38 |
Purchases/originations | 0 | 0 | (1) | (1) |
Sales |  |  |  | 0 |
Settlements | (18) | (16) | (40) | (35) |
Transfers into Level 3 | 0 | 0 | 0 | 0 |
Balance, end of period | 3 | 2 | 3 | 2 |
The amount of total (losses) gains for the period included in earnings attributable to the change in unrealized gains or losses relating to assets still held | 8 | 6 | 10 | 7 |
Equity Derivatives |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation |  |  |  |  |
Balance, beginning of period | (145) | (164) | (170) | (168) |
Included in earnings | (18) | (47) | (37) | (87) |
Purchases/originations | 0 | 0 | 0 | 0 |
Sales |  |  |  | 0 |
Settlements | 13 | 15 | 57 | 59 |
Transfers into Level 3 | 0 | 0 | 0 | 0 |
Balance, end of period | (150) | (196) | (150) | (196) |
The amount of total (losses) gains for the period included in earnings attributable to the change in unrealized gains or losses relating to assets still held | (18) | (47) | (37) | (87) |
Residential Mortgage Loans |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation |  |  |  |  |
Balance, beginning of period | 107 | 109 | 108 | 116 |
Included in earnings | 2 | 7 | 5 | 4 |
Purchases/originations | 0 | 0 | 0 | 0 |
Sales |  |  |  | 0 |
Settlements | (3) | (3) | (9) | (9) |
Transfers into Level 3 | 1 | 1 | 3 | 3 |
Balance, end of period | 107 | 114 | 107 | 114 |
The amount of total (losses) gains for the period included in earnings attributable to the change in unrealized gains or losses relating to assets still held | $ 2 | $ 7 | $ 5 | $ 4 |

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