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Employee Benefit Plans (Components Of Net Periodic Pension Costs) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]      
Service cost $ 36 $ 41 $ 39
Interest cost 59 51 68
Expected return on plan assets (139) (142) (148)
Amortization of actuarial loss 32 54 47
Settlement charge 6 11 0
Net periodic pension (benefit) cost (6) 15 6
Qualified Plan [Member] | Pension Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 34 38 34
Interest cost 56 49 64
Expected return on plan assets (139) (142) (148)
Amortization of actuarial loss 25 46 39
Settlement charge 4 0 0
Net periodic pension (benefit) cost (20) (9) (11)
Nonqualified Plan [Member] | Supplemental Employee Retirement Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 2 3 5
Interest cost 3 2 4
Expected return on plan assets 0 0 0
Amortization of actuarial loss 7 8 8
Settlement charge 2 11 0
Net periodic pension (benefit) cost $ 14 $ 24 $ 17