v3.26.1
Fair Value Measurement - Level 3 Recurring Fair Value Rollforward (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Derivative, Fair Value, Net [Abstract]          
Derivative assets, gross amount $ 2,443   $ 2,443   $ 2,201
Derivative liabilities, gross amount 2,523   2,523   2,129
Recurring | Level 3          
Derivative, Fair Value, Net [Abstract]          
Beginning balance     110    
Ending balance (19)   (19)    
Net unrealized gains (losses) included in OCI related to assets and liabilities still held (1) $ 4 (4) $ 4  
Derivative assets, gross amount 430 518 430 518 444
Derivative liabilities, gross amount 449 410 449 410 $ 334
RMBS | Recurring | Level 3          
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]          
Beginning balance 154 143 126 116  
Total Gains or (Losses) (Realized/Unrealized), Included in Net Income 2 2 4 4  
Total Gains or (Losses) (Realized/Unrealized), Included in OCI 0 0 (2) 3  
Purchases 0 0 0 0  
Sales 0 0 0 0  
Issuances 0 0 0 0  
Settlements (5) (4) (9) (7)  
Transfers Into Level 3 1 1 37 26  
Transfers Out of Level 3 (7) 0 (11) 0  
Ending balance 145 142 145 142  
Derivative, Fair Value, Net [Abstract]          
Net Unrealized Gains (Losses) Included in Net Income Related to Assets and Liabilities Still Held 2 2 4 4  
CMBS | Recurring | Level 3          
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]          
Beginning balance 130 2 22 2  
Total Gains or (Losses) (Realized/Unrealized), Included in Net Income 0 0 0 0  
Total Gains or (Losses) (Realized/Unrealized), Included in OCI 0 0 0 0  
Purchases 0 0 0 0  
Sales 0 (1) 0 (1)  
Issuances 0 0 0 0  
Settlements (2) (1) (2) (1)  
Transfers Into Level 3 0 0 129 0  
Transfers Out of Level 3 (1) 0 (22) 0  
Ending balance 127 0 127 0  
Derivative, Fair Value, Net [Abstract]          
Net Unrealized Gains (Losses) Included in Net Income Related to Assets and Liabilities Still Held 0 0 0 0  
Total investment securities available for sale | Recurring | Level 3          
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]          
Beginning balance 284 145 148 118  
Total Gains or (Losses) (Realized/Unrealized), Included in Net Income 2 2 4 4  
Total Gains or (Losses) (Realized/Unrealized), Included in OCI 0 0 (2) 3  
Purchases 0 0 0 0  
Sales 0 (1) 0 (1)  
Issuances 0 0 0 0  
Settlements (7) (5) (11) (8)  
Transfers Into Level 3 1 1 166 26  
Transfers Out of Level 3 (8) 0 (33) 0  
Ending balance 272 142 272 142  
Derivative, Fair Value, Net [Abstract]          
Net Unrealized Gains (Losses) Included in Net Income Related to Assets and Liabilities Still Held 2 2 4 4  
Retained interests in securitizations | Recurring | Level 3          
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]          
Beginning balance 27 32 28 34  
Total Gains or (Losses) (Realized/Unrealized), Included in Net Income 0 (3) (1) (5)  
Total Gains or (Losses) (Realized/Unrealized), Included in OCI 0 0 0 0  
Purchases 0 0 0 0  
Sales 0 0 0 0  
Issuances 0 0 0 0  
Settlements 0 0 0 0  
Transfers Into Level 3 0 0 0 0  
Transfers Out of Level 3 0 0 0 0  
Ending balance 27 29 27 29  
Derivative, Fair Value, Net [Abstract]          
Net Unrealized Gains (Losses) Included in Net Income Related to Assets and Liabilities Still Held 0 (2) (1) (5)  
Net derivative assets (liabilities) | Recurring | Level 3          
Derivative, Fair Value, Net [Abstract]          
Beginning balance 88 89 110 69  
Total Gains or (Losses) (Realized/Unrealized), Included in Net Income (88) 3 (104) 16  
Total Gains or (Losses) (Realized/Unrealized), Included in OCI 0 0 0 0  
Purchases 0 0 0 0  
Sales 0 0 0 0  
Issuances (10) 10 (18) 24  
Settlements (9) 6 (8) (1)  
Transfers Into Level 3 0 0 1 0  
Transfers Out of Level 3 0 0 0 0  
Ending balance (19) 108 (19) 108  
Net Unrealized Gains (Losses) Included in Net Income Related to Assets and Liabilities Still Held $ (85) $ 3 $ (114) $ 14