v3.25.1
Fair Value Disclosures - Rollforward of Level 3 Assets and Liabilities (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Primary income statement location loan servicing rights Mortgage banking income  
Primary income statement location loan servicing rights Mortgage banking income  
Loans and Leases    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance $ 13 $ 15
Included in earnings 0 0
Issuances 0 0
Sales   0
Settlements (1) (1)
Ending balance 12 14
Change in unrealized gains (losses) included in earnings for the period, attributable to assets and liabilities still held 0  
Servicing Contracts [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 3,708 3,378
Included in earnings (56) 82
Issuances 57 32
Sales   (1)
Settlements (81) (74)
Ending balance 3,628 3,417
Change in unrealized gains (losses) included in earnings for the period, attributable to assets and liabilities still held (56)  
Net Derivatives    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance (41) (19)
Included in earnings 6 (3)
Issuances 4 (1)
Sales   0
Settlements (2) 2
Ending balance (33) $ (21)
Change in unrealized gains (losses) included in earnings for the period, attributable to assets and liabilities still held $ (2)