v3.22.0.1
Employee Benefit Plans (Components Of Net Periodic Pension Costs) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]      
Service cost $ 41 $ 39 $ 31
Interest cost 51 68 80
Expected return on plan assets (142) (148) (137)
Amortization of actuarial loss 54 47 41
Settlement charge 11 0 2
Net periodic pension (benefit) cost 15 6 17
Qualified Plan [Member] | Pension Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 38 34 28
Interest cost 49 64 75
Expected return on plan assets (142) (148) (137)
Amortization of actuarial loss 46 39 36
Settlement charge 0 0 0
Net periodic pension (benefit) cost (9) (11) 2
Nonqualified Plan [Member] | Supplemental Employee Retirement Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 3 5 3
Interest cost 2 4 5
Expected return on plan assets 0 0 0
Amortization of actuarial loss 8 8 5
Settlement charge 11 0 2
Net periodic pension (benefit) cost $ 24 $ 17 $ 15