v3.25.4
Pension And Postretirement Benefits (Net Periodic Benefit Cost (Credit)) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]      
Net pension and postretirement cost (credit) $ (1,121) $ (1,817) $ (1,017)
Pension Benefits      
Defined Benefit Plan Disclosure [Line Items]      
Service cost – benefits earned during the period 427 487 477
Interest cost on projected benefit obligation 1,601 1,586 1,876
Expected return on assets (2,029) (2,212) (2,533)
Amortization of prior service credit (48) (87) (133)
Net periodic benefit cost (credit) before remeasurement (49) (226) (313)
Actuarial (gain) loss 96 38 1,717
Settlement (gain) loss 0 0 (363)
Net pension and postretirement cost (credit) 47 (188) 1,041
Postretirement Benefits      
Defined Benefit Plan Disclosure [Line Items]      
Service cost – benefits earned during the period 18 22 23
Interest cost on projected benefit obligation 318 310 340
Expected return on assets (38) (61) (130)
Amortization of prior service credit (1,837) (1,928) (2,472)
Net periodic benefit cost (credit) before remeasurement (1,539) (1,657) (2,239)
Actuarial (gain) loss 371 28 181
Settlement (gain) loss 0 0 0
Net pension and postretirement cost (credit) $ (1,168) $ (1,629) $ (2,058)