XML 90 R52.htm IDEA: XBRL DOCUMENT
v3.25.0.1

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 Benefits |  | Other Postretirement Benefits
(millions of dollars, except where stated otherwise) | U.S. |  | Non-U.S. |  |
2024 |  | 2023 |  | 2024 |  | 2023 |  | 2024 |  | 2023
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 1 | 13,143 |  |  | 12,350 |  |  | 21,327 |  |  | 19,342 |  |  | 5,014 |  |  | 5,211 |
Service cost | 499 |  |  | 466 |  |  | 338 |  |  | 323 |  |  | 81 |  |  | 78 |
Interest cost | 671 |  |  | 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 other | 1 |  |  | (17) |  |  | (118) |  |  | 46 |  |  | 101 |  |  | (193) |
Benefit obligation at December 31 | 12,999 |  |  | 13,143 |  |  | 19,198 |  |  | 21,327 |  |  | 4,791 |  |  | 5,014 |
Accumulated benefit obligation at December 31 | 11,227 |  |  | 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 Benefits |  | Other Postretirement Benefits
(millions of dollars) | U.S. |  | Non-U.S. |  |
2024 |  | 2023 |  | 2024 |  | 2023 |  | 2024 |  | 2023
Change in plan assets |  |  |  |  |  |  |  |  |  |  |
Fair value at January 1 | 11,367 |  |  | 10,989 |  |  | 18,431 |  |  | 16,757 |  |  | 371 |  |  | 348 |
Actual return on plan assets | 286 |  |  | 1,121 |  |  | 862 |  |  | 1,484 |  |  | 20 |  |  | 36 |
Foreign exchange rate changes | — |  |  | — |  |  | (1,051) |  |  | 492 |  |  | — |  |  | — |
Company contribution | 300 |  |  | — |  |  | 288 |  |  | 615 |  |  | 24 |  |  | 38 |
Benefits paid (1) | (709) |  |  | (743) |  |  | (931) |  |  | (878) |  |  | (51) |  |  | (51) |
Other | — |  |  | — |  |  | (221) |  |  | (39) |  |  | — |  |  | — |
Fair value at December 31 | 11,244 |  |  | 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.
2024 |  | 2023 |  | 2024 |  | 2023
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. |  |  |  |
2024 |  | 2023 |  | 2024 |  | 2023 |  | 2024 |  | 2023
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 assets | 2 |  |  | — |  |  | 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 income | 379 |  |  | 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 Benefits |  | Other Postretirement Benefits
(millions of dollars, except where stated otherwise) | U.S. |  | Non-U.S. |  |  |  |  |  |
2024 |  | 2023 |  | 2022 |  | 2024 |  | 2023 |  | 2022 |  | 2024 |  | 2023 |  | 2022
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 cost | 499 |  |  | 466 |  |  | 712 |  |  | 338 |  |  | 323 |  |  | 570 |  |  | 81 |  |  | 78 |  |  | 138 |
Interest cost | 671 |  |  | 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 cost | 27 |  |  | 29 |  |  | 205 |  |  | 16 |  |  | 5 |  |  | 4 |  |  | — |  |  | — |  |  | — |
Net periodic benefit cost | 525 |  |  | 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)/credit | 31 |  |  | 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 tax | 443 |  |  | 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) | 2024 |  | 2023 |  | 2022
(Charge)/credit to other comprehensive income, before tax |  |  |  |  |
U.S. pension | 82 |  |  | 141 |  |  | 939 |
Non-U.S. pension | 788 |  |  | (641) |  |  | 1,979 |
Other postretirement benefits | (86) |  |  | (4) |  |  | 1,881 |
Total (charge)/credit to other comprehensive income, before tax | 784 |  |  | (504) |  |  | 4,799 |
(Charge)/credit to income tax (see Note 4) | (208) |  |  | 180 |  |  | (1,236) |
(Charge)/credit to investment in equity companies | 24 |  |  | 16 |  |  | 235 |
(Charge)/credit to other comprehensive income including noncontrolling interests, after tax | 600 |  |  | (308) |  |  | 3,798 |
Charge/(credit) to equity of noncontrolling interests | (120) |  |  | 54 |  |  | (212) |
(Charge)/credit to other comprehensive income attributable to ExxonMobil | 480 |  |  | (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. Pension |  | Non-U.S. Pension
(millions of dollars) |  | Fair Value Measurement at December 31, 2024, Using: |  |  | Fair Value Measurement at December 31, 2024, Using: |  |
| Level 1 |  | Level 2 |  |  | Level 3 |  | Net Asset Value |  | Total |  | Level 1 |  |  | Level 2 |  |  | Level 3 |  | Net Asset Value |  | Total
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. Pension |  | Non-U.S. Pension
(millions of dollars) |  | Fair Value Measurement at December 31, 2023, Using: |  |  |  | Fair Value Measurement at December 31, 2023, Using: |  |
| Level 1 |  | Level 2 |  |  | Level 3 |  | Net Asset Value |  | Total |  | Level 1 |  |  | Level 2 |  |  | Level 3 |  | Net Asset Value |  | Total
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 1 |  |  | Level 2 |  |  | Level 3 |  | Net Asset Value |  | Total
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 value | 128 |  |  |  | 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 1 |  |  | Level 2 |  |  | Level 3 |  | Net Asset Value |  | Total
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 value | 124 |  |  |  | 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.
2024 |  | 2023 |  | 2024 |  | 2023
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 obligation | 11,501 |  |  | 11,638 |  |  | 1,982 |  |  | 2,334 |
Fair value of plan assets | 11,232 |  |  | 11,367 |  |  | 1,261 |  |  | 1,465 |
For unfunded pension plans: |  |  |  |  |  |  |
Projected benefit obligation | 1,488 |  |  | 1,505 |  |  | 3,499 |  |  | 3,924 |
Accumulated benefit obligation | 1,229 |  |  | 1,173 |  |  | 3,224 |  |  | 3,592 |
Expected Contributions and Benefit Payments for Pension Benefits And Other Postretirement Benefits |
| Pension Benefits |  | Other Postretirement Benefits
(millions of dollars) | U.S. |  | Non-U.S. |  | Gross |  | Medicare Subsidy Receipt
Contributions expected in 2025 | — |  |  | 325 |  |  | — |  |  | — |
Benefit payments expected in: |  |  |  |  |  |  |
2025 | 1,104 |  |  | 1,101 |  |  | 356 |  |  | 1 |
2026 | 1,109 |  |  | 1,077 |  |  | 349 |  |  | 1 |
2027 | 1,102 |  |  | 1,110 |  |  | 346 |  |  | 1 |
2028 | 1,119 |  |  | 1,146 |  |  | 344 |  |  | 1 |
2029 | 1,133 |  |  | 1,131 |  |  | 343 |  |  | 1 |
2030 - 2034 | 5,854 |  |  | 5,681 |  |  | 1,752 |  |  | 3 |

X
- References No definition available. + Details
Name: | us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of benefit obligation and plan assets of defined benefit plan with accumulated benefit obligation in excess of plan assets. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-3 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-3 + Details
Name: | us-gaap_ScheduleOfAccumulatedBenefitObligationsInExcessOfFairValueOfPlanAssetsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the change in the accumulated postemployment benefit obligation from the beginning to the end of the period, showing separately, if applicable, the effects of the following: service cost, interest cost, contributions by plan participants, actuarial gains and losses, foreign currency exchange rate changes, benefits paid, plan amendments, business combinations, divestitures, curtailments, settlements, and special and contractual termination benefits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Subparagraph (a) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
Name: | us-gaap_ScheduleOfChangesInAccumulatedPostemploymentBenefitObligationsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the reconciliation of beginning and ending balances of the fair value of plan assets of pension plans and/or other employee benefit plans showing separately, if applicable, the effects during the period attributable to each of the following: actual return on plan assets, foreign currency exchange rate changes, contributions by the employer, contributions by plan participants, benefits paid, business combinations, divestitures, and settlements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Subparagraph (b) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
Name: | us-gaap_ScheduleOfChangesInFairValueOfPlanAssetsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of benefits expected to be paid by pension plans and/or other employee benefit plans in each of the next five fiscal years and in the aggregate for the five fiscal years thereafter. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Subparagraph (f) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
Name: | us-gaap_ScheduleOfExpectedBenefitPaymentsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Schedule of amounts recorded in balance sheet and accumulated other comprehensive income. + References No definition available. + Details
Name: | xom_ScheduleOfAmountsRecordedInBalanceSheetAndInAccumulatedOtherComprehensiveIncomeTableTextBlock
Namespace Prefix: | xom_
Data Type: | dtr-types1:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Schedule of assumptions, components of benefit cost and amounts recorded in accumulated other comprehensive income for pension and other postretirement benefits + References No definition available. + Details
Name: | xom_ScheduleOfAssumptionsComponentsOfBenefitCostAndAmountsRecordedInAccumulatedOtherComprehensiveIncomeForPensionAndOtherPostretirementBenefitsTableTextBlock
Namespace Prefix: | xom_
Data Type: | dtr-types1:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular presentation of fair value of the benefit plan assets, including the level within the fair value hierarchy. + References No definition available. + Details
Name: | xom_ScheduleOfFairValueOfPensionBenefitPlanAssetsTableTextBlock
Namespace Prefix: | xom_
Data Type: | dtr-types1:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Schedule of fair value of other postretirement benefit plan assets + References No definition available. + Details
Name: | xom_ScheduleOfFairValueOfPostretirementBenefitPlanAssetsTableTextBlock
Namespace Prefix: | xom_
Data Type: | dtr-types1:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Schedule of summary of assets in excess of (less than) benefit obligation. + References No definition available. + Details
Name: | xom_ScheduleOfSummaryOfAssetsInExcessOfLessThanBenefitObligationTableTextBlock
Namespace Prefix: | xom_
Data Type: | dtr-types1:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Summary of change in accumulated other comprehensive income table. + References No definition available. + Details
Name: | xom_SummaryOfChangeInAccumulatedOtherComprehensiveIncomeTableTableTextBlock
Namespace Prefix: | xom_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration