v3.26.1
Derivatives (Summary Of Types Of Derivatives And Gains (Losses) Recorded) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative gain (losses) $ (1) $ 1
Future | Interest rate contracts    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative gain (losses) $ (2) $ 3
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Other income Other income
Interest rate forward sales commitments | Interest rate contracts    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative gain (losses) $ 1 $ (1)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Residential mortgage banking revenue, net Residential mortgage banking revenue, net
Interest rate swaps | Interest rate contracts    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative gain (losses) $ 0 $ (1)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Other income Other income