v3.25.2
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 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation          
Balance, beginning of period $ 1,599 $ 1,707 $ 1,639 $ 1,685  
Included in earnings (38) (42) (89) (44)  
Purchases/originations 15 10 24 20  
Sales   (5)   (5)  
Settlements 16 5 17 18  
Transfers into Level 3 1 1 2 2  
Balance, end of period 1,593 1,676 1,593 1,676  
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) (12) (68) (2)  
Derivative Assets 1,997   1,997   $ 2,472
Derivative Liabilities 2,266   2,266   $ 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 7 6 7 6  
Derivative Liabilities 5 6 5 6  
Servicing Rights          
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation          
Balance, beginning of period 1,663 1,756 1,704 1,737  
Included in earnings (49) (30) (100) (22)  
Purchases/originations 15 10 25 21  
Sales   (5)   (5)  
Settlements 0 0 0 0  
Transfers into Level 3 0 0 0 0  
Balance, end of period 1,629 1,731 1,629 1,731  
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 (26) 7 (60) 35  
Interest rate contracts          
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation          
Balance, beginning of period 0 0 (3) 0  
Included in earnings 12 12 27 21  
Purchases/originations 0 0 (1) (1)  
Sales   0   0  
Settlements (10) (12) (21) (20)  
Transfers into Level 3 0 0 0 0  
Balance, end of period 2 0 2 0  
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 5 8 6  
Equity Derivatives          
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation          
Balance, beginning of period (173) (162) (170) (168)  
Included in earnings (1) (23) (19) (40)  
Purchases/originations 0 0 0 0  
Sales   0   0  
Settlements 29 21 44 44  
Transfers into Level 3 0 0 0 0  
Balance, end of period (145) (164) (145) (164)  
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 (1) (23) (19) (40)  
Residential Mortgage Loans          
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation          
Balance, beginning of period 109 113 108 116  
Included in earnings 0 (1) 3 (3)  
Purchases/originations 0 0 0 0  
Sales   0   0  
Settlements (3) (4) (6) (6)  
Transfers into Level 3 1 1 2 2  
Balance, end of period 107 109 107 109  
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 $ 0 $ (1) $ 3 $ (3)