v3.25.2
Medium- And Long-Term Debt (Schedule Of Medium- And Long-Term Debt) (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2025
Dec. 31, 2024
Debt Instrument [Line Items]    
Medium- and long-term debt $ 5,762 $ 6,673
Parent company    
Debt Instrument [Line Items]    
Medium- and long-term notes 1,540 1,503
Medium- and long-term debt 1,786 1,746
Subsidiaries    
Debt Instrument [Line Items]    
Subordinated notes 973 953
Long-Term Federal Home Loan Bank Advances 3,003 3,974
Medium- and long-term debt 3,976 4,927
3.80% subordinated notes due 2026 | Parent company    
Debt Instrument [Line Items]    
Subordinated notes $ 246 243
Stated interest rate 3.80%  
Maturity year 2026  
4.00% notes due 2029 | Parent company    
Debt Instrument [Line Items]    
Medium- and long-term notes $ 533 519
Stated interest rate 4.00%  
Maturity year 2029  
5.982% Notes Due 2030 | Parent company    
Debt Instrument [Line Items]    
Medium- and long-term notes $ 1,007 984
Stated interest rate 5.982%  
4.00% subordinated notes due 2025 | Subsidiaries    
Debt Instrument [Line Items]    
Subordinated notes $ 349 345
Stated interest rate 4.00%  
Maturity year 2025  
7.875% subordinated notes due 2026 | Subsidiaries    
Debt Instrument [Line Items]    
Subordinated notes $ 155 157
Stated interest rate 7.875%  
Maturity year 2026  
5.332 subordinated notes due 2033 | Subsidiaries    
Debt Instrument [Line Items]    
Subordinated notes $ 469 451
Stated interest rate 5.332%  
Maturity year 2033  
5.07% advance due 2025 | Subsidiaries    
Debt Instrument [Line Items]    
Long-Term Federal Home Loan Bank Advances $ 0 1,000
Stated interest rate 5.07%  
Maturity year 2025  
4.79% advance due 2026 | Subsidiaries    
Debt Instrument [Line Items]    
Long-Term Federal Home Loan Bank Advances $ 999 997
Stated interest rate 4.79%  
Maturity year 2026  
4.49% advance due 2027 | Subsidiaries    
Debt Instrument [Line Items]    
Long-Term Federal Home Loan Bank Advances $ 1,002 992
Stated interest rate 4.49%  
Maturity year 2027  
4.49% advance due 2028 | Subsidiaries    
Debt Instrument [Line Items]    
Long-Term Federal Home Loan Bank Advances $ 1,002 $ 985
Stated interest rate 4.49%  
Maturity year 2028