v3.24.3
Pension And Postretirement Benefits (Qualified Pension and Postretirement Benefit Cost) (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Defined Benefit Plan Disclosure [Line Items]        
Net (credit) cost $ (471) $ (696) $ (1,412) $ (2,111)
Pension Plan        
Defined Benefit Plan Disclosure [Line Items]        
Service cost – benefits earned during the period 122 122 365 365
Interest Cost on projected/accumulated benefit obligations 396 416 1,189 1,448
Expected return on assets 553 570 1,658 1,999
Amortization of prior service credit (21) (33) (65) (100)
Net pension/postretirement (credit) cost (56) (65) (169) (286)
Actuarial (gain) loss 0 (71) 0 218
Settlement (gain) loss 0 0 0 (363)
Net (credit) cost (56) (136) (169) (431)
Postretirement Benefits        
Defined Benefit Plan Disclosure [Line Items]        
Service cost – benefits earned during the period 5 5 16 17
Interest Cost on projected/accumulated benefit obligations 77 85 232 255
Expected return on assets 15 32 45 98
Amortization of prior service credit (482) (618) (1,446) (1,854)
Net (credit) cost $ (415) $ (560) $ (1,243) $ (1,680)