v3.25.4
Pension And Other Postretirement Benefits (Summary Of The Change In Accumulated Other Comprehensive Income) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]      
Total (charge)/credit to other comprehensive income, before tax $ 1,394 $ 784 $ (504)
(Charge)/credit to income tax (see Note 5) (376) (208) 180
(Charge)/credit to investment in equity companies 29 24 16
(Charge)/credit to other comprehensive income including noncontrolling interests, after tax 1,047 600 (308)
Charge/(credit) to equity of noncontrolling interests (59) (120) 54
Other Postretirement Benefits      
Defined Benefit Plan Disclosure [Line Items]      
Total (charge)/credit to other comprehensive income, before tax (190) (86) (4)
Exxon Mobil Corporation Share After Noncontrolling Interest      
Defined Benefit Plan Disclosure [Line Items]      
Total change in accumulated other comprehensive income 988 480 (254)
Pension Benefits - U.S.      
Defined Benefit Plan Disclosure [Line Items]      
Total (charge)/credit to other comprehensive income, before tax 522 82 141
Pension Benefits - Non-U.S.      
Defined Benefit Plan Disclosure [Line Items]      
Total (charge)/credit to other comprehensive income, before tax $ 1,062 $ 788 $ (641)