v3.25.4
Other Comprehensive Income Information (Schedule of Accumulated Other Comprehensive Income Information) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Cumulative Foreign Exchange Translation Adjustment [Roll Forward]      
Current period change excluding amounts reclassified from accumulated other comprehensive income $ 2,631 $ (3,550) $ 1,241
Amounts reclassified from accumulated other comprehensive income 391 0 609
Postretirement Benefits Reserves Adjustment [Roll Forward]      
Current period change excluding amounts reclassified from accumulated other comprehensive income 1,009 557 (369)
Amounts reclassified from accumulated other comprehensive income 38 43 61
Accumulated Other Comprehensive Income [Roll Forward]      
Balance at beginning of period (14,619)    
Balance at end of period (10,863) (14,619)  
Exxon Mobil Corporation Share After Noncontrolling Interest      
Cumulative Foreign Exchange Translation Adjustment [Roll Forward]      
Beginning balance, cumulative foreign exchange translation adjustment (16,166) (13,056) (14,591)
Current period change excluding amounts reclassified from accumulated other comprehensive income 2,360 (3,110) 1,108
Amounts reclassified from accumulated other comprehensive income 408 0 427
Total change in accumulated other comprehensive income 2,768 (3,110) 1,535
Ending balance, cumulative foreign exchange translation adjustment (13,398) (16,166) (13,056)
Net investment hedge gain/(loss), net of taxes (294) 196 (135)
Postretirement Benefits Reserves Adjustment [Roll Forward]      
Beginning balance, postretirement benefits reserves adjustment 1,547 1,067 1,321
Current period change excluding amounts reclassified from accumulated other comprehensive income 952 449 (305)
Amounts reclassified from accumulated other comprehensive income 36 31 51
Total change in accumulated other comprehensive income 988 480 (254)
Ending balance, postretirement benefits reserves adjustment 2,535 1,547 1,067
Accumulated Other Comprehensive Income [Roll Forward]      
Balance at beginning of period (14,619) (11,989) (13,270)
Current period change excluding amounts reclassified from accumulated other comprehensive income 3,312 (2,661) 803
Amounts reclassified from accumulated other comprehensive income 444 31 478
Total change in accumulated other comprehensive income 3,756 (2,630) 1,281
Balance at end of period $ (10,863) $ (14,619) $ (11,989)