v3.26.1
Fair Value Measurement - Level 3 Recurring Fair Value Rollforward (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Derivative, Fair Value, Net [Abstract]      
Derivative assets, gross amount $ 3,412   $ 2,201
Derivative liabilities, gross amount 2,925   2,129
Recurring | Level 3      
Derivative, Fair Value, Net [Abstract]      
Beginning balance 110    
Ending balance 88    
Net unrealized gains (losses) included in OCI related to assets and liabilities still held (4) $ 4  
Derivative assets, gross amount 421 570 444
Derivative liabilities, gross amount 333 481 $ 334
Total RMBS | Recurring | Level 3      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Beginning balance 126 116  
Total Gains or (Losses) (Realized/Unrealized), Included in Net Income 2 2  
Total Gains or (Losses) (Realized/Unrealized), Included in OCI (2) 3  
Purchases 0 0  
Sales 0 0  
Issuances 0 0  
Settlements (4) (3)  
Transfers Into Level 3 36 25  
Transfers Out of Level 3 (4) 0  
Ending balance 154 143  
Derivative, Fair Value, Net [Abstract]      
Net Unrealized Gains (Losses) Included in Net Income Related to Assets and Liabilities Still Held 2 2  
CMBS | Recurring | Level 3      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Beginning balance 22 2  
Total Gains or (Losses) (Realized/Unrealized), Included in Net Income 0 0  
Total Gains or (Losses) (Realized/Unrealized), Included in OCI 0 0  
Purchases 0 0  
Sales 0 0  
Issuances 0 0  
Settlements 0 0  
Transfers Into Level 3 129 0  
Transfers Out of Level 3 (21) 0  
Ending balance 130 2  
Derivative, Fair Value, Net [Abstract]      
Net Unrealized Gains (Losses) Included in Net Income Related to Assets and Liabilities Still Held 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 148 118  
Total Gains or (Losses) (Realized/Unrealized), Included in Net Income 2 2  
Total Gains or (Losses) (Realized/Unrealized), Included in OCI (2) 3  
Purchases 0 0  
Sales 0 0  
Issuances 0 0  
Settlements (4) (3)  
Transfers Into Level 3 165 25  
Transfers Out of Level 3 (25) 0  
Ending balance 284 145  
Derivative, Fair Value, Net [Abstract]      
Net Unrealized Gains (Losses) Included in Net Income Related to Assets and Liabilities Still Held 2 2  
Retained interests in securitizations | Recurring | Level 3      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Beginning balance 28 34  
Total Gains or (Losses) (Realized/Unrealized), Included in Net Income (1) (2)  
Total Gains or (Losses) (Realized/Unrealized), Included in OCI 0 0  
Purchases 0 0  
Sales 0 0  
Issuances 0 0  
Settlements 0 0  
Transfers Into Level 3 0 0  
Transfers Out of Level 3 0 0  
Ending balance 27 32  
Derivative, Fair Value, Net [Abstract]      
Net Unrealized Gains (Losses) Included in Net Income Related to Assets and Liabilities Still Held (1) (2)  
Net derivative assets (liabilities) | Recurring | Level 3      
Derivative, Fair Value, Net [Abstract]      
Beginning balance 110 69  
Total Gains or (Losses) (Realized/Unrealized), Included in Net Income (16) 13  
Total Gains or (Losses) (Realized/Unrealized), Included in OCI 0 0  
Purchases 0 0  
Sales 0 0  
Issuances (8) 14  
Settlements 1 (7)  
Transfers Into Level 3 1 0  
Transfers Out of Level 3 0 0  
Ending balance 88 89  
Net Unrealized Gains (Losses) Included in Net Income Related to Assets and Liabilities Still Held $ (29) $ 11