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Employee Benefit Plans (Schedule of Changes, Net of Tax, in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Actuarial gain (loss) arising during the period $ (415) $ 160 $ 128
Amortization of actuarial net loss 28 40 47
Amortization of prior service credit (23) (25) (27)
Total recognized in other comprehensive loss (410) $ 175 $ 148
Qualified Plan      
Actuarial gain (loss) arising during the period (453)    
Amortization of actuarial net loss 19    
Amortization of prior service credit (14)    
Total recognized in other comprehensive loss (448)    
Non-Qualified Plan      
Actuarial gain (loss) arising during the period 37    
Amortization of actuarial net loss 9    
Amortization of prior service credit (9)    
Total recognized in other comprehensive loss 37    
Postretirement Benefit Plan      
Actuarial gain (loss) arising during the period 1    
Amortization of actuarial net loss 0    
Amortization of prior service credit 0    
Total recognized in other comprehensive loss $ 1