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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, 2024
Dec. 31, 2023
Dec. 31, 2022
Actuarial gain (loss) arising during the period $ 35 $ 96 $ (415)
Amortization of net actuarial loss 27 36 28
Amortization of prior service credit (22) (23) (23)
Total recognized in other comprehensive income (loss) 40 109 $ (410)
Qualified Plan      
Actuarial gain (loss) arising during the period 36    
Amortization of net actuarial loss 23    
Amortization of prior service credit (15) 19  
Total recognized in other comprehensive income (loss) 44    
Non-Qualified Plan      
Actuarial gain (loss) arising during the period 0    
Amortization of net actuarial loss 4    
Amortization of prior service credit (7) 29  
Total recognized in other comprehensive income (loss) (3)    
Postretirement Benefit Plan      
Actuarial gain (loss) arising during the period (1)    
Amortization of net actuarial loss 0    
Amortization of prior service credit 0 $ 2  
Total recognized in other comprehensive income (loss) $ (1)