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Pension And Other Postretirement Benefits (Tables)
 12 Months Ended
Dec. 31, 2024
Retirement Benefits [Abstract]  
Change In Benefit Obligation Of Pension And Other Postretirement Benefits
 Pension BenefitsOther Postretirement Benefits
(millions of dollars, except where stated otherwise)U.S.Non-U.S.
202420232024202320242023
 
Weighted-average assumptions used to determine benefit obligations at December 31      
Discount rate (percent)
5.70 5.30 4.60 4.30 5.80 5.30 
Long-term rate of compensation increase (percent)
4.00 4.50 4.20 4.50 4.00 4.50 
Change in benefit obligation
Benefit obligation at January 113,143 12,350 21,327 19,342 5,014 5,211 
Service cost499 466 338 323 81 78 
Interest cost671 664 823 922 250 276 
Actuarial loss/(gain) (1)
(441)550 (658)1,393 (81)176 
Benefits paid (2)(3)
(874)(870)(1,240)(1,214)(534)(545)
Foreign exchange rate changes— — (1,274)515 (40)11 
Amendments, divestments and other1 (17)(118)46 101 (193)
Benefit obligation at December 3112,999 13,143 19,198 21,327 4,791 5,014 
Accumulated benefit obligation at December 3111,227 11,033 17,818 19,769 — — 
(1) Actuarial loss/(gain) primarily reflects higher discount rates.
(2) Benefit payments for funded and unfunded plans.
(3) For 2024 and 2023, other postretirement benefits paid are net of $10 million and $19 million of Medicare subsidy receipts, respectively.
Change In Plan Assets Of Pension And Other Postretirement Benefits
 Pension BenefitsOther Postretirement Benefits
 (millions of dollars)U.S.Non-U.S.
202420232024202320242023
Change in plan assets      
Fair value at January 111,367 10,989 18,431 16,757 371 348 
Actual return on plan assets286 1,121 862 1,484 20 36 
Foreign exchange rate changes— — (1,051)492 — — 
Company contribution300 — 288 615 24 38 
Benefits paid (1)
(709)(743)(931)(878)(51)(51)
Other— — (221)(39)— — 
Fair value at December 3111,244 11,367 17,378 18,431 364 371 
(1) Benefit payments for funded plans.
Summary Of Assets In Excess Of/(Less Than) Benefit Obligation
 Pension Benefits
(millions of dollars)U.S.Non-U.S.
2024202320242023
Assets in excess of/(less than) benefit obligation 
Balance at December 31    
Funded plans(267)(271)1,679 1,028 
Unfunded plans(1,488)(1,505)(3,499)(3,924)
Total(1,755)(1,776)(1,820)(2,896)
Amounts Recorded In Balance Sheet And Other Comprehensive Income
 Pension Benefits Other Postretirement Benefits
(millions of dollars)U.S.Non-U.S.
202420232024202320242023
Assets in excess of/(less than) benefit obligation      
Balance at December 31 (1)
(1,755)(1,776)(1,820)(2,896)(4,427)(4,643)
Amounts recorded in the Consolidated Balance Sheet consist of:
Other assets2 — 2,399 1,895 — — 
Current liabilities(213)(201)(207)(225)(283)(288)
Postretirement benefits reserves(1,544)(1,575)(4,012)(4,566)(4,144)(4,355)
Total recorded(1,755)(1,776)(1,820)(2,896)(4,427)(4,643)
Amounts recorded in accumulated other comprehensive income consist of:
Net actuarial loss/(gain)631 744 557 1,364 (1,421)(1,453)
Prior service cost(252)(283)420 401 (405)(459)
Total recorded in accumulated other comprehensive income379 461 977 1,765 (1,826)(1,912)
(1) Fair value of assets less benefit obligation shown on the preceding page.
Schedule Of Assumptions, Components Of Benefit Cost And Amounts Recorded In Accumulated Other Comprehensive Income For Pension And Other Postretirement Benefits
 Pension BenefitsOther Postretirement
Benefits
(millions of dollars, except where stated otherwise)U.S.Non-U.S.
202420232022202420232022202420232022
Weighted-average assumptions used to determine net periodic benefit cost for years ended December 31
Discount rate (percent)
5.30 5.60 3.00 4.30 4.90 2.20 5.30 5.60 3.10 
Long-term rate of return on funded assets (percent)
6.80 5.20 4.60 5.50 4.20 3.50 6.00 4.70 3.80 
Long-term rate of compensation increase (percent)
4.50 4.50 4.50 4.50 5.20 4.20 4.50 4.50 4.50 
Components of net periodic benefit cost
Service cost499 466 712 338 323 570 81 78 138 
Interest cost671 664 518 823 922 614 250 276 216 
Expected return on plan assets(724)(532)(560)(955)(688)(815)(20)(14)(14)
Amortization of actuarial loss/(gain)83 85 156 97 108 180 (103)(122)6 
Amortization of prior service cost(31)(29)(29)50 52 43 (63)(42)(42)
Net pension enhancement and curtailment/settlement cost27 29 205 16 5 4 — — — 
Net periodic benefit cost525 683 1,002 369 722 596 145 176 304 
Changes in amounts recorded in accumulated other comprehensive income:
Net actuarial loss/(gain)(3)(39)(607)(611)602 (1,641)(81)154 (1,910)
Amortization of actuarial (loss)/gain(110)(114)(361)(112)(108)(183)103 122 (6)
Prior service cost/(credit)— (17)— 81 153 84 (8)(312)— 
Amortization of prior service (cost)/credit31 29 29 (44)(52)(40)63 42 42 
Foreign exchange rate changes— — — (102)46 (199)9 (2)(7)
Total recorded in other comprehensive income(82)(141)(939)(788)641 (1,979)86 4 (1,881)
Total recorded in net periodic benefit cost and other comprehensive income, before tax443 542 63 (419)1,363 (1,383)231 180 (1,577)
Summary Of Change In Accumulated Other Comprehensive Income
A summary of the change in accumulated other comprehensive income is shown in the table below:
Total Pension and Other Postretirement Benefits
 (millions of dollars)
202420232022
 
(Charge)/credit to other comprehensive income, before tax   
U.S. pension82 141 939 
Non-U.S. pension788 (641)1,979 
Other postretirement benefits(86)(4)1,881 
Total (charge)/credit to other comprehensive income, before tax784 (504)4,799 
(Charge)/credit to income tax (see Note 4)
(208)180 (1,236)
(Charge)/credit to investment in equity companies24 16 235 
(Charge)/credit to other comprehensive income including noncontrolling interests, after tax600 (308)3,798 
Charge/(credit) to equity of noncontrolling interests(120)54 (212)
(Charge)/credit to other comprehensive income attributable to ExxonMobil480 (254)3,586 
Fair Value Of The Benefit Plan Assets (Pension)
The 2024 fair value of the benefit plan assets, including the level within the fair value hierarchy, is shown in the tables below:
 U.S. PensionNon-U.S. Pension
(millions of dollars)
Fair Value Measurement at
December 31, 2024, Using:
Fair Value Measurement at
December 31, 2024, Using:
Level 1Level 2 Level 3Net Asset ValueTotalLevel 1 Level 2 Level 3Net Asset ValueTotal
 
Asset category:            
Equity securities            
U.S.— —  — 2,263 2,263 —  —  — 2,865 2,865 
Non-U.S.— —  — 1,225 1,225 43 (1)—  — 1,560 1,603 
Private equity— —  — 439 439 —  —  — 291 291 
Debt securities   
Corporate— 971 (2)— 4,498 5,469 —  49 (2)— 3,650 3,699 
Government— 592 (2)— 1,126 1,718 77 (3)141 (2)— 8,222 8,440 
Asset-backed— —  — 1 1 —  12 (2)— 180 192 
Other— — — — — — — — 13 13 
Real Estate— — — — — — — — 107 107 
Cash— —  — 113 113 78  6 (4)— 69 153 
Other— 14 — — 14 — — — — — 
Total at fair value— 1,577  — 9,665 11,242 198  208  — 16,957 17,363 
Insurance contracts at contract value   2    15 
Total plan assets   11,244    17,378 
(1) For non-U.S. equity securities held in separate accounts, fair value is based on observable quoted prices on active exchanges.
(2) For corporate, government and asset-backed debt securities, fair value is based on observable inputs of comparable market transactions.
(3) For government debt securities that are traded on active exchanges, fair value is based on observable quoted prices.
(4) For cash balances that are subject to withdrawal penalties or other adjustments, the fair value is treated as a level 2 input.
The 2023 fair value of the benefit plan assets, including the level within the fair value hierarchy, is shown in the tables below: 
 U.S. PensionNon-U.S. Pension
 (millions of dollars)
Fair Value Measurement at
December 31, 2023, Using:
Fair Value Measurement at
December 31, 2023, Using:
Level 1Level 2 Level 3Net Asset ValueTotal Level 1 Level 2 Level 3Net Asset ValueTotal
 
Asset category:            
Equity securities            
U.S.— —  — 2,114 2,114 —  —  — 2,642 2,642 
Non-U.S.— —  — 1,344 1,344 52 (1)—  — 1,688 1,740 
Private equity— —  — 375 375 —  —  — 294 294 
Debt securities   
Corporate— 4,699 (2)— 1 4,700 —  61 (2)— 4,370 4,431 
Government— 2,650 (2)— 2 2,652 134 (3)171 (2)— 8,429 8,734 
Asset-backed— —  — 1 1 —  22 (2)— 221 243 
Other— — — — — — — — 4 4 
Real Estate— — — — — — — — 70 70 
Cash— —  — 178 178 189  17 (4)— 45 251 
Total at fair value— 7,349  — 4,015 11,364 375  271  — 17,763 18,409 
Insurance contracts at contract value   3     22 
Total plan assets   11,367     18,431 
(1) For non-U.S. equity securities held in separate accounts, fair value is based on observable quoted prices on active exchanges.
(2) For corporate, government and asset-backed debt securities, fair value is based on observable inputs of comparable market transactions.
(3) For government debt securities that are traded on active exchanges, fair value is based on observable quoted prices.
(4) For cash balances that are subject to withdrawal penalties or other adjustments, the fair value is treated as a level 2 input.
Fair Value Of The Benefit Plan Assets (Other Postretirement)
 Other Postretirement
(millions of dollars)Fair Value Measurement at December 31, 2024, Using: 
Level 1Level 2Level 3Net Asset ValueTotal
 
Asset category:     
Equity securities     
U.S.92 (1)— — — 92 
Non-U.S.36 (1)— — — 36 
Debt securities
Corporate— 57 (2)— — 57 
Government— 174 (2)— — 174 
Asset-backed— 3 (2)— — 3 
Cash— 2 — — 2 
Total at fair value128 236 — — 364 
(1) For equity securities held in separate accounts, fair value is based on observable quoted prices on active exchanges.
(2) For corporate, government and asset-backed debt securities, fair value is based on observable inputs of comparable market transactions.
 Other Postretirement
(millions of dollars)Fair Value Measurement at December 31, 2023, Using: 
Level 1Level 2Level 3Net Asset ValueTotal
 
Asset category:     
Equity securities     
U.S.84 (1)— — — 84 
Non-U.S.40 (1)— — — 40 
Debt securities
Corporate— 61 (2)— — 61 
Government— 182 (2)— — 182 
Asset-backed— 3 (2)— — 3 
Cash— 1 — — 1 
Total at fair value124 247 — — 371 
(1) For equity securities held in separate accounts, fair value is based on observable quoted prices on active exchanges.
(2) For corporate, government and asset-backed debt securities, fair value is based on observable inputs of comparable market transactions.
Pension Plans With Accumulated Benefit Obligation In Excess Of Plan Assets
A summary of pension plans with an accumulated benefit obligation and projected benefit obligation in excess of plan assets is shown in the table below:
 Pension Benefits
(millions of dollars)U.S.Non-U.S.
2024202320242023
 
For funded pension plans with an accumulated benefit obligation in excess of plan assets:
   
Accumulated benefit obligation— — 1,025 1,145 
Fair value of plan assets— — 574 562 
For funded pension plans with a projected benefit obligation in
excess of plan assets:
Projected benefit obligation11,501 11,638 1,982 2,334 
Fair value of plan assets11,232 11,367 1,261 1,465 
For unfunded pension plans:
Projected benefit obligation1,488 1,505 3,499 3,924 
Accumulated benefit obligation1,229 1,173 3,224 3,592 
Expected Contributions and Benefit Payments for Pension Benefits And Other Postretirement Benefits
 Pension BenefitsOther Postretirement Benefits
(millions of dollars)U.S.Non-U.S.GrossMedicare Subsidy Receipt
 
Contributions expected in 2025
— 325 — — 
Benefit payments expected in:
20251,104 1,101 356 1 
20261,109 1,077 349 1 
20271,102 1,110 346 1 
20281,119 1,146 344 1 
20291,133 1,131 343 1 
2030 - 2034
5,854 5,681 1,752 3