v3.25.4
Pension And Postretirement Benefits (Change In The Projected Benefit Obligation) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Actuarial (gain) loss $ 519 $ 56 $ 1,594
Pension Benefits      
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Benefit obligation at beginning of year 30,944 33,227  
Service cost - benefits earned during the period 427 487 477
Interest cost on projected benefit obligation 1,601 1,586 1,876
Actuarial (gain) loss 629 (1,909)  
Benefits paid, including settlements (2,957) (2,447)  
Group annuity contract transfer (17) 0  
Benefit obligation at end of year 30,627 30,944 33,227
Postretirement Benefits      
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Benefit obligation at beginning of year 6,339 6,693  
Service cost - benefits earned during the period 18 22 23
Interest cost on projected benefit obligation 318 310 340
Actuarial (gain) loss 394 84  
Benefits paid, including settlements (609) (770)  
Group annuity contract transfer 17 0  
Benefit obligation at end of year $ 6,477 $ 6,339 $ 6,693