v3.26.1
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
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation      
Balance, beginning of period $ 1,581 $ 1,639  
Included in earnings (15) (51)  
Purchases/originations/acquisitions 12 8  
Settlements 23 1  
Transfers into Level 3 2 2  
Balance, end of period 1,603 1,599  
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 (3) (45)  
Derivative Assets 3,330   $ 1,868
Derivative Liabilities 3,501   $ 2,034
Unrealized gains or losses included in other comprehensive income for instruments still held 0 0  
Interest rate contracts | Level 3      
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation      
Derivative Assets 7 5  
Derivative Liabilities 10 5  
Servicing Rights      
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation      
Balance, beginning of period 1,598 1,704  
Included in earnings (38) (50)  
Purchases/originations/acquisitions 23 9  
Settlements 0 0  
Transfers into Level 3 0 0  
Balance, end of period 1,583 1,663  
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 (17) (35)  
Interest rate contracts      
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation      
Balance, beginning of period 1 (3)  
Included in earnings 16 15  
Purchases/originations/acquisitions (6) (1)  
Settlements (14) (11)  
Transfers into Level 3 0 0  
Balance, end of period (3) 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 7 6  
Equity Derivatives      
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation      
Balance, beginning of period (124) (170)  
Included in earnings 8 (18)  
Purchases/originations/acquisitions (5) 0  
Settlements 39 15  
Transfers into Level 3 0 0  
Balance, end of period (82) (173)  
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 (18)  
Residential Mortgage Loans      
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation      
Balance, beginning of period 106 108  
Included in earnings (1) 2  
Purchases/originations/acquisitions 0 0  
Settlements (2) (3)  
Transfers into Level 3 2 2  
Balance, end of period 105 109  
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 $ (1) $ 2