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GasTerra B.V. [Member] GasTerra B.V. [Member] Trade, less reserves of $170 million and $168 million Accounts Receivable, after Allowance for Credit Loss, Current Supplemental Cash Flow Elements [Abstract] Long-term rate of compensation increase (percent) Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase Additions to short-term debt Proceeds from Short-Term Debt, Maturing in More than Three Months Short Term Financing [Member] Line of Credit [Member] Charge/(credit) to equity of noncontrolling interests Other Comprehensive Income Loss Charge Credit To Equity Of Noncontrolling Interests Other Comprehensive Income Loss Charge Credit To Equity Of Noncontrolling Interests Operating And Finance Leases Other Information Cash Flow Operating And Finance Leased Facilities [Table Text Block] Trading Symbol Trading Symbol Guarantor Obligations, Nature [Domain] Guarantor Obligations, Nature [Domain] Deferred Income Tax (Assets) And Liabilities By Balance Sheet Classification Schedule of Deferred Income Tax (Assets) and Liabilities by Balance Sheet Classification [Table Text Block] Schedule of deferred income tax (assets) and liabilities by balance sheet classification. 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Oil and Gas Properties Oil and Gas Properties Policy [Policy Text Block] Awards issued in 2023 (USD per share) Weighted Average Fair Value Of Restricted Stock And Restricted Stock Units At Grant Date Weighted Average Fair Value Of Restricted Stock And Restricted Stock Units At Grant Date Amendments, divestments and other Defined Benefit Plan Amendments And Other Changes Defined Benefit Plan Amendments And Other Changes Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Golden Pass LNG Terminal LLC Golden Pass Lng Terminal Llc [Member] Golden Pass LNG Terminal LLC [Member] Income and Other Taxes [Line Items] Income and Other Taxes [Line Items] Income and Other Taxes [Line Items] Share Based Compensation Arrangement By Share Based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Measure: Measure [Axis] Name Outstanding Recovery, Individual Name Oil and Gas, Exploratory Well Drilled [Table] Oil and Gas, Exploratory Well Drilled [Table] Other Debt Obligations [Member] Other Debt Obligations [Member] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Net pension enhancement and curtailment/settlement cost Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment Deferred Tax Liabilities/(Assets) Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Derivative Instruments Derivatives, Policy [Policy Text Block] Cash flows from operating activities - operating leases Operating Lease, Payments Balance (in shares) - outstanding Balance (in shares) - outstanding Common Stock, Shares, Outstanding Intersegment revenue Intersegment Revenue Intersegment Revenue Interest cost Defined Benefit Plan, Interest Cost Total Gain (Loss) on Derivative Instruments, Net, Pretax PEO PEO [Member] Energy Products [Member] Energy Products [Member] The manufacture, distribution and marketing of energy products Other Stockholders' Equity, Other Auditor Location Auditor Location Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] Pension And Other Postretirement Benefits Retirement Benefits [Text Block] Change in plan assets Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] Long-term assets Assets, Noncurrent Government Assistance [Table] Government Assistance [Table] State taxes, net of federal tax benefit Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Finance Leases Finance Lease, Liability [Abstract] Impact of expropriation (after-tax) benefit Impact Of Expropriation (After-Tax) Impact Of Expropriation (After-Tax) Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Golden Pass Pipeline LLC Golden Pass Pipeline Llc [Member] Golden Pass Pipeline LLC. [Member] Debt Instrument [Axis] Debt Instrument [Axis] Germany GERMANY Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Current assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets Percent of shares in each award vesting after five years Percent Of Shares In Each Award Vesting After Five Years Percent of shares in each award vesting after five years. Capitalized Exploratory Well Costs [Line Items] Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] Credit Facility [Axis] Credit Facility [Axis] Projected benefit obligation Defined Benefit Plan, Pension Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Projected Benefit Obligation Total Liabilities Liabilities Number of projects that have drilling in the preceding twelve months or exploratory activity planned in the next two years as of December 31. Number Of Projects With Capitalized Well Drilled In Preceding Twelve Months Or Exploration Planned In Next Two Years As Of Year End Number Of Projects With Capitalized Well Drilled In Preceding Twelve Months Or Exploration Planned In Next Two Years As Of Year End Permian Highway Pipeline LLC Permian Highway Pipeline Llc [Member] Permian Highway Pipeline LLc [Member] Brazil BRAZIL Other assets, including intangibles, net Deferred Tax Asset Included In Other Assets Including Intangibles Net Deferred Tax Asset Included In Other Assets Including Intangibles Net Title of Individual [Axis] Title of Individual [Axis] QatarEnergy LNG N (2) Qatar Liquefied Gas Company Limited2 [Member] Qatar Liquefied Gas Company Limited 2 [Member] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Benefits payments expected in 2024 Defined Benefit Plan, Expected Future Prescription Drug Subsidy Receipt, Year One Canada CANADA Property, Plant and Equipment, Type [Domain] Long-Lived Tangible Asset [Domain] Disposal Group, Disposed of by Sale Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] Government Assistance, Statement of Income or Comprehensive Income [Extensible Enumeration] Government Assistance, Statement of Income or Comprehensive Income [Extensible Enumeration] Benefits payments expected in 2025 Defined Benefit Plan, Expected Future Benefit Payment, Year Two Government Debt Securities [Member] US Government Debt Securities [Member] China CHINA Total Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Drilling Rigs and Related Equipment [Member] Lease Agreements Drilling Rigs And Related Equipment [Member] Lease agreements related to drilling rigs and related equipment [Member] Share of equity company revenues from sales to consolidated companies Share Of Equity Company Sales Revenues From Consolidated Companies Share of equity company sales revenues from consolidated companies. 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Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information. It includes other taxes. 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Entity Emerging Growth Company Entity Emerging Growth Company United Kingdom UNITED KINGDOM Debt issuance costs Debt Issuance Costs, Net 6.375% senior notes due 2038 Six Point Three Seven Five Percent Senior Note Due2038 [Member] Six Point Three Seven Five Percent Senior Notes Due 2038 Nonconsolidated Investees, Other Nonconsolidated Investees, Other [Member] Total deferred tax assets Deferred Tax Assets, Gross Effect of equity method of accounting Effective Income Tax Rate Reconciliation, Equity in Earnings (Losses) of Unconsolidated Subsidiary, Amount Exxon Mobil Corporation Share After Noncontrolling Interest [Member] Parent Company [Member] Barzan Gas Company Limited Barzan Gas Company Limited [Member] Barzan Gas Company Limited [Member] Income and Other Taxes Income and Other Taxes Policy [Policy Text Block] Disclosure of accounting policy for income and other taxes Mozambique MOZAMBIQUE 2024 Lessee, Operating Lease, Liability, to be Paid, Year One Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Title Trading Arrangement, Individual Title Estimated 2024 cash payments for operating and finance leases not yet commenced Lessee Lease Lease Not Yet CommencedExpectedPaymentYearOne Lessee Lease Lease Not Yet CommencedExpectedPaymentYearOne Chemical Products [Member] Chemical Products [Member] The manufacture, distribution and marketing of chemical products Business acquisition, equity interest issued or issuable, value assigned Business Acquisition, Equity Interest Issued or Issuable, Value Assigned Position [Domain] Position [Domain] Nigeria NIGERIA Common Stock, without par value [Member] Common Stock [Member] Amounts Recorded In Balance Sheet And Other Comprehensive Income Schedule Of Amounts Recorded In Balance Sheet And In Accumulated Other Comprehensive Income [Table Text Block] Schedule of amounts recorded in balance sheet and accumulated other comprehensive income. Postretirement benefits reserves adjustment (excluding amortization) Current period change excluding amounts reclassified from accumulated other comprehensive income Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax Individual: Individual [Axis] Capitalized For A Period Of Greater Than Ten Years [Member] Aging of Capitalized Exploratory Well Costs, Period Four [Member] Entity Address Postal Zip Code Entity Address, Postal Zip Code Management, Professional, And Technical Participants Management, Professional, And Technical Participants [Member] Management, Professional, And Technical Participants Reductions due to lapse of the statute of limitations Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations Income Statement Location [Domain] Income Statement Location [Domain] Additional undiscounted commitments for leases not yet commenced Lessee Lease Lease Not Yet Commenced Additional undiscounted commitments for leases not yet commenced. Total Equity Balance Balance Equity, Including Portion Attributable to Noncontrolling Interest Industrial revenue bonds due 2022-2051 Industrial Revenue Bonds Due 2022-2051 [Member] Industrial Revenue Bonds Due 2022-2051 [Member] Dividends - common shares (NCI) Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Project in Vietnam - Blue Whale [Member] Cost of Project In Blue Whale [Member] Cost of Project In Blue Whale [Member] Minimum [Member] Minimum [Member] Property, plant and equipment, at cost, less accumulated depreciation and depletion Property, plant and equipment, net Property, Plant and Equipment, Net Postretirement Benefits Reserves Adjustment [Roll Forward] Postretirement Benefits Reserves Adjustment [Roll Forward] Postretirement Benefits Reserves Adjustment Notes and accounts receivable – net Total Receivables, Net, Current Dividends paid per common share (in dollars per share) Common Stock, Dividends, Per Share, Cash Paid Advances to/receivables from equity companies Advances To Receivables From Equity Companies Total other comprehensive income (loss) Other comprehensive income Other Comprehensive Income (Loss), Net of Tax Disposal Group Classification [Axis] Disposal Group Classification [Axis] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Benefit obligation at January 1 Benefit obligation at December 31 Defined Benefit Plan, Benefit Obligation Accrued taxes other than income taxes Accrual for Taxes Other than Income Taxes, Current ASSETS Assets [Abstract] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Additions to long-term debt Proceeds from Issuance of Long-Term Debt Benefits payments expected in 2026 Defined Benefit Plan, Expected Future Benefit Payment, Year Three Foreign currency transaction gain/(loss), before tax Gain (Loss), Foreign Currency Transaction, before Tax Long-Term Debt Assumed by 3rd party Long-Term Debt Assumed by 3rd party Long-Term Debt Assumed by 3rd party Other assets Deferred Tax Assets, Other Summary Of Assets In Excess Of/(Less Than) Benefit Obligation Schedule Of Summary Of Assets In Excess Of Less Than Benefit Obligation [Table Text Block] Schedule of summary of assets in excess of (less than) benefit obligation. LIABILITIES Liabilities [Abstract] Project In Papua New Guinea - Muruk [Member] Cost Of Project In Papua New Guinea Muruk [Member] Cost Of Project In Papua New Guinea Muruk Accumulated benefit obligation Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Accumulated Benefit Obligation Long-term receivables and miscellaneous, net of reserves of $1,966 million and $1,623 million Accounts and Financing Receivable, after Allowance for Credit Loss, Noncurrent Summary Of Change In Accumulated Other Comprehensive Income Summary of Change in Accumulated Other Comprehensive Income Table [Table Text Block] Summary of change in accumulated other comprehensive income table. Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities Retirement Plan Type [Axis] Retirement Plan Type [Axis] Lessee Lease Description [Line Items] Lessee, Lease, Description [Line Items] ExxonMobil Share Of Earnings Reinvested [Member] Retained Earnings [Member] Portion of long-term debt included in current liability Long-Term Debt, Current Maturities Kazakhstan KAZAKHSTAN Number of projects that only have exploratory well costs capitalized for a period of one year or less Number Of Projects That Only Have Exploratory Well Costs Capitalized For Period Of One Year Or Less Number Of Projects With Capitalized Well Drilled In Preceding Twelve Months Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Property, Plant And Equipment And Asset Retirement Obligations Property Plant And Equipment And Asset Retirement Obligations [Text Block] Property, plant and equipment and asset retirement obligations. The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures. Also includes the entire disclosure for an asset retirement obligation and the associated long-lived asset. An asset retirement obligation is a legal obligation associated with the disposal or retirement from service of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees. Foreign exchange rate changes Defined Benefit Plan, Benefit Obligation, Foreign Currency Translation Gain (Loss) Earnings (loss) per common share (dollars) Earnings (loss) per common share, diluted (in dollars per share) Earnings Per Share, Basic Accounting Policies [Abstract] Accounting Policies [Abstract] Derivative asset, current, statement of financial position [Extensible Enumeration] Derivative Asset, Current, Statement of Financial Position [Extensible Enumeration] Net (gain)/loss on asset sales Gain (Loss) on Disposition of Assets Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Accounts payable and accrued liabilities Accounts Payable and Accrued Liabilities, Current [Abstract] Fair value at January 1 Fair value at December 31 Fair value of plan assets Defined Benefit Plan, Plan Assets, Amount Capital Units by Class [Axis] Capital Units by Class [Axis] Private Equity [Member] Private Equity Funds [Member] U.S. tax on non-U.S. operations Federal Income Tax Expense Benefit On Foreign Operations Federal Income Tax Expense Benefit on Foreign Operations Benefits paid Defined Benefit Plan, Benefit Obligation, Benefits Paid Leases, Finance [Abstract] Leases, Finance [Abstract] Leases, Finance Project in Mozambique - Rovuma LNG Phase 1 [Member] Costs Of Project In Rovuma LNG Phase One [Member] Costs Of Project In Rovuma LNG Phase 1 [Member] Principles of Consolidation and Accounting for Investments Consolidation, Policy [Policy Text Block] 3.482% notes due 2030 ThreePointFourEightTwoNotesDue2030 [Member] ThreePointFourEightTwoNotesDue2030 Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Long-term liabilities Liabilities, Noncurrent Operating Lease [Member] Operating Lease [Member] Document Transition Report Document Transition Report Award Timing Predetermined Award Timing Predetermined [Flag] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Effective Tax Rate [Table] Effective Tax Rate [Table] Proceeds from asset sales and returns of investments Proceeds from Sales of Business, Affiliate and Productive Assets Accounts and other payables increase/(reduction) Increase (Decrease) in Accounts Payable Other Accounts Payable, Other, Current Valuation Allowance by Deferred Tax Asset [Axis] Valuation Allowance by Deferred Tax Asset [Axis] Entity Public Float Entity Public Float Divestments/Other Other Capitalized Exploratory Well Costs Previously capitalized costs of the drilling of wells that were related to assets that were divested or otherwise removed from capitalized costs. Project [Axis] Aging of Capitalized Exploratory Well Costs [Axis] Valuation allowance change Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount All Trading Arrangements All Trading Arrangements [Member] OnePointFiveSevenOneNotesDue2023 [Member] OnePointFiveSevenOneNotesDue2023 [Member] OnePointFiveSevenOneNotesDue2023 All Adjustments to Compensation All Adjustments to Compensation [Member] Compensation Amount Outstanding Recovery Compensation Amount Reductions in short-term debt Repayments of Short-Term Debt, Maturing in More than Three Months Equity Method Investment, Nonconsolidated Investee [Axis] Equity Method Investment, Nonconsolidated Investee [Axis] Russia RUSSIAN FEDERATION Forfeited (USD per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Deferred income tax charges/(credits) Deferred Income Tax Expense (Benefit) Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Finance Lease Paid To Equity Company [Member] Finance Lease Paid To Equity Company [Member] Funded plans Funded Plans Total finance lease liability Finance Lease, Liability Document Financial Statement Error Correction [Flag] Document Financial Statement Error Correction [Flag] Forfeited (shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Equity interests issued or issuable, number of shares (in shares) Business Acquisition, Equity Interest Issued or Issuable, Number of Shares ExxonMobil share of equity company income taxes Share of Equity Company Income Taxes Share of Equity Company Income Taxes Accumulated benefit obligation at December 31 Defined Benefit Plan, Accumulated Benefit Obligation Infineum USA L.P. Infineum USA L.P. [Member] Infineum USA L.P. Fair value of plan assets, net asset value Defined Benefit Plan Fair Value Of Plan Assets Net Asset Value Defined benefit plan fair value of plan assets measured according to net asset value Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table] Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table] XTO Energy Inc. [Member] Xto Energy Inc [Member] XTO Energy Inc. Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Total income (loss) before taxes Results Of Operations Income Before Consolidate and Equity Company Income Taxes Results Of Operations Income Before Consolidate and Equity Company Income Taxes Reserves for long-term receivables and miscellaneous investments Reserves for Long-term receivables and miscellaneous investments Reserves for Long-term receivables and miscellaneous investments Project in Kazakhstan - Kairan [Member] Cost Of Project In Kairan [Member] Cost Of Project In Kairan [Member] QatarEnergy LNG S (3) QatarEnergy LNG S (3) [Member] Ras Laffan Liquefied Natural Gas Company Limited (3) [Member] Issued for acquisitions (in shares) Stock Issued During Period, Shares, Acquisitions Documents Incorporated by Reference Text Block Documents Incorporated by Reference [Text Block] Papua New Guinea PAPUA NEW GUINEA Document Period End Date Document Period End Date Adoption Date Trading Arrangement Adoption Date Finance lease weighted average discount rate - percent Finance Lease, Weighted Average Discount Rate, Percent Finance lease liability - noncurrent Finance Lease, Liability, Noncurrent Marine Well Containment Company LLC Marine Well Containment Company LLC [Member] Marine Well Containment Company LLC [Member] Interest payable on income tax reserves Income Tax Examination, Interest Accrued Common Stock Held In Treasury [Member] Treasury Stock, Common [Member] Denbury Inc. Denbury Inc. [Member] Denbury Inc. Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Net Investment Hedge Risk Management Derivatives, Methods of Accounting, Hedging Derivatives [Policy Text Block] Effective income tax rate reconciliation, European tax on energy sector, amount Effective Income Tax Rate Reconciliation, European Tax On Energy Sector, Amount Effective Income Tax Rate Reconciliation, European Tax On Energy Sector, Amount Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Income tax expense (benefit) Income tax expense (benefit) Total income tax expense (benefit) Income Tax Expense (Benefit) Non-U.S. Non-US [Member] Long-term debt Long Term Fair Value Debt Energy [Axis] Energy [Axis] Finance lease right of use asset Finance Lease, Right-of-Use Asset, after Accumulated Amortization Vesting [Axis] Vesting [Axis] Fair Value Of The Benefit Plan Assets (Other Postretirement) Schedule Of Fair Value Of Postretirement Benefit Plan Assets [Table Text Block] Schedule of fair value of other postretirement benefit plan assets Amounts reclassified from accumulated other comprehensive income Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax 0.835% Notes Due in 2032 [Member] Zero Point Eight Three Five Percent Notes Due 2032 [Member] Zero Point Eight Three Five Percent Notes Due 2032 Cash flow from investing activities Operating Lease, Payments, Use Additional Detail For Projects With Completed Exploratory Activity Progressing Toward Development Additional Details For Projects With Completed Exploratory Activity Progressing Toward Development [Text Block] Additional details for projects with completed exploratory activity progressing toward development. Operating lease weighted average remaining lease term - years Operating Lease, Weighted Average Remaining Lease Term Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Amortization of actuarial loss/(gain) Defined Benefit Plan, Amortization of Gain (Loss) Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Comprehensive income (loss) including noncontrolling interests Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Long-term rate of return on funded assets (percent) Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-Term Rate of Return on Plan Assets Long Term Financing [Member] Line Of Credit Long Term [Member] Equity Method Investment, Financial Statement, Reported Amounts [Abstract] Equity Method Investment, Financial Statement, Reported Amounts [Abstract] Lease Type [Domain] Lease Type [Domain] Credit Facility [Domain] Credit Facility [Domain] Share repurchases, at cost (in shares) Treasury Stock, Shares, Acquired Property, plant and equipment, useful life Property, Plant and Equipment, Useful Life Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Vietnam VIET NAM Discount rate (percent) Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate Project in Papua New Guinea - P'nyang [Member] Cost Of Project In Pnyang [Member] Cost Of Project In Pnyang [Member] Effect Of Collateral Netting [Member] Effect Of Collateral Netting [Member] Investments, Advances And Long-Term Receivables Investments Advances And Long Term Receivables [Text Block] Tabular disclosure of investments, advances and long term receivables. Petroleum Products [Member] Products [Member] Finance right-of-use assets obtained in exchange for new lease liabilities Right-of-Use Asset Obtained in Exchange for Finance Lease Liability Asset impairment charges after tax Asset Impairment Charges After Tax Asset Impairment Charges After Tax Cash flows from operating activities - finance leases Finance Lease Principal Payments For Operating Activities Other taxes and duties Taxes, Other Finance lease - discount to present value Finance Lease, Liability, Undiscounted Excess Amount Settlements with tax authorities Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities Notes and accounts receivable reduction/(increase) Increase (Decrease) in Accounts and Notes Receivable Document Annual Report Document Annual Report QatarEnergy LNG S (2) QatarEnergy LNG S (2) [Member] QatarEnergy LNG S (2) Net investment hedge gain/(loss), net of taxes Other Comprehensive Income Loss Net Investment Hedge Gain Loss Net Of Tax Other Comprehensive Income Loss Net Investment Hedge Gain Loss Net Of Tax Balance Sheet Location [Axis] Balance Sheet Location [Axis] Income from equity affiliates Earnings of equity companies included above Income (Loss) from Equity Method Investments Income from equity affiliates Income From Equity Affiliates [Member] Income From Equity Affiliates Loss Contingencies [Line Items] Loss Contingencies [Line Items] Cover [Abstract] Cover [Abstract] Position [Axis] Position [Axis] Pioneer Natural Resources Pioneer Natural Resources Merger [Member] Pioneer Natural Resources Merger Tax Period [Axis] Tax Period [Axis] United States United States UNITED STATES Number of projects that have exploratory well costs capitalized for a period greater than one year Projects that have Exploratory Well Costs that have been Capitalized for Period Greater than One Year, Number of Projects Other long-term obligations Other Liabilities, Noncurrent Schedule Of Guarantees Schedule of Guarantor Obligations [Table Text Block] Total operating lease payments Lessee, Operating Lease, Liability, to be Paid Gas/other Natural Gas And Other Inventory Environmental Certificates and Natural Gas Cash Payments For Interest And Income Taxes Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Amortization of right of use assets Finance Lease, Right-of-Use Asset, Amortization Disclosures About Segments And Related Information Segment Reporting Disclosure [Text Block] Increase/(decrease) in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Equity Component [Domain] Equity Component [Domain] Finance lease liability - current Finance Lease, Liability, Current Project [Axis] Project [Axis] Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Other liabilities Deferred Tax Liabilities, Other 2.995% notes due 2039 Two Point Nine Nine Five Notes Due 2039 [Member] Long-term Debt, Unclassified [Abstract] Long-Term Debt, Unclassified [Abstract] 3.567% notes due 2045 Three Point Five Six Seven Notes Due 2045 [Member] Entity Current Reporting Status Entity Current Reporting Status Gulf Coast Growth Ventures LLC Gulf Coast Growth Ventures LLC [Member] Gulf Coast Growth Ventures LLC [Member] Project in Mozambique - Rovuma LNG Future Non-Straddling Train [Member] Costs Of Project In Rovuma LNG Future Non Straddling Train [Member] Costs Of Project In Rovuma LNG Future Non Straddling Train [Member] Tanzania TANZANIA, UNITED REPUBLIC OF Exploratory Wells Drilled [Line Items] Oil and Gas, Exploratory Well Drilled [Line Items] Long-term rate of compensation increase (percent) Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase Total deferred tax liabilities Deferred Tax Liabilities, Gross Consolidated Entities [Domain] Consolidated Entities [Domain] Singapore SINGAPORE Liabilities incurred Asset Retirement Obligation, Liabilities Incurred Segments [Axis] Segments [Axis] Property, Plant And Equipment Property, Plant and Equipment, Policy [Policy Text Block] Other comprehensive income (loss) (net of income taxes) Other Comprehensive Income (Loss), Net of Tax [Abstract] Accumulated Other Comprehensive Income [Roll Forward] Accumulated Other Comprehensive Income [Roll Forward] Accumulated Other Comprehensive Income Scenario [Domain] Scenario [Domain] Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Guarantees Guarantor Obligations, Current Carrying Value EQUITY Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Saudi Aramco Mobil Refinery Company Ltd. Saudi Aramco Mobil Refinery Company Ltd [Member] Saudi Aramco Mobil Refinery Company Ltd. [Member] Share-based Payment Arrangement, Tranche One [Member] Share-Based Payment Arrangement, Tranche One [Member] Schedule Of Income Tax (Expense)/Credit For Components Of Other Comprehensive Income Schedule Of Income Tax Expense For Components Of Comprehensive Income [Table Text Block] Schedule Of Income Tax Expense For Components Of Comprehensive Income [Table Text Block] Consolidated Entities [Axis] Consolidated Entities [Axis] Net income (loss) attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Pay vs Performance Disclosure [Line Items] Entity Voluntary Filers Entity Voluntary Filers Impaired Long-Lived Assets Held and Used, Asset Name [Domain] Impaired Long-Lived Assets Held and Used, Asset Name [Domain] Statistical Measurement [Domain] Statistical Measurement [Domain] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Effects of exchange rate changes on cash Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Continuing Operations Crude oil and product purchases Crude Oil And Product Purchases [Member] Crude Oil And Product Purchases Upstream Upstream [Member] Upstream [Member] The exploration and production (E&P) sector in the oil and gas industry. Balance at beginning of period Balance at end of period Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Segment Reporting [Abstract] Materials and supplies Inventory, Parts and Components, Net of Reserves Discontinued Operations and Disposal Groups [Abstract] Discontinued Operations and Disposal Groups [Abstract] Defined Benefit Plan, Real Estate [Member] Defined Benefit Plan, Real Estate [Member] Restatement Determination Date: Restatement Determination Date [Axis] Investment, Name [Axis] Investment, Name [Axis] Corporate Debt Securities [Member] Corporate Debt Securities [Member] Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Commitments and contingencies Commitments and Contingencies Additions to property, plant and equipment Segment, Expenditure, Addition to Long-Lived Assets 0.835% notes due 2032 ZeroPointEightThreeFiveNotesDue2032 [Member] ZeroPointEightThreeFiveNotesDue2032 ExxonMobil [Member] ExxonMobil [Member] ExxonMobil 2.275% notes due 2026 Two Point Two Seven Five Notes Due 2026 [Member] Geographical [Axis] Geographical [Axis] Petroleum products Energy Related Inventory, Crude Oil, Products and Merchandise Two Point Seven Two Six Notes Due 2023 [Member] Two Point Seven Two Six Notes Due 2023 [Member] 2.726% Notes Due 2023 [Member] Pension Benefits - Non-U.S. [Member] Foreign Plan [Member] Benefits payments expected in 2028 Defined Benefit Plan, Expected Future Benefit Payment, Year Five Leases Lessee, Leases [Policy Text Block] Property, plant & equipment Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Revenue Recognition Revenue [Policy Text Block] Guarantor Obligations, Nature [Axis] Guarantor Obligations, Nature [Axis] Business Acquisition [Line Items] Business Acquisition [Line Items] Weighted-Average Grant-Date Fair Value per Share Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] 3.176% notes due 2024 Three Point One Seven Six Notes Due 2024 [Member] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Contingent consideration payments Payment for Contingent Consideration Liability, Financing Activities Inventories Inventory, Net [Abstract] Foreign exchange effects/other Unrecognized Tax Benefits Foreign Exchange Effects Other Unrecognized Tax Benefits Foreign Exchange Effects Other PEO Total Compensation Amount PEO Total Compensation Amount Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Projects in Angola - Block 32 Central NE Hub [Member] Cost Of Project In - Block 32 Central NE Hub [Member] Cost Of Project In - Block 32 Central NE Hub Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Level 3 [Member] Fair Value, Inputs, Level 3 [Member] Common stock held in treasury, shares Balance (in shares) - in treasury Balance (in shares) - in treasury Treasury Stock, Common, Shares Benefits payments expected in 2024 Defined Benefit Plan, Expected Future Benefit Payment, Year One Minimum ownership of affiliates needed for awards Minimum Ownership Of Affiliate Needed For Awards Minimum ownership of affiliate needed for awards Mozambique Rovuma Venture S.p.A. Mozambique Rovuma Venture SpA [Member] Mozambique Rovuma Venture SpA [Member] Service station buildings and fixed improvements Building and Building Improvements [Member] Number of projects with completed exploratory activity progressing toward development as of December 31 Number Of Projects With Capitalized Well Exploration Completed As Of Year End Progressing Toward Development Number Of Projects With Capitalized Well Exploration Completed As Of Year End Progressing Toward Development Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Additional investments and advances Additional Investments And Advances The cash outflow from investing in cost and equity method investments, advancing money to equity method affiliates and from long-term receivables. (Charge)/credit to income tax (see Note 4) Other Comprehensive Income (Loss), Tax Net income (loss) attributable to ExxonMobil Net income (loss) attributable to ExxonMobil Earnings (loss) after income tax Net Income (Loss) Short-term and other (net of sublease rental income) Short Term And Other Net Of Sublease Rental Income Total current liabilities Current liabilities Liabilities, Current Schedule of Notional Amounts of Outstanding Derivative Positions Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block] 2025 Finance Lease, Liability, to be Paid, Year Two Foreign Currency Translation Foreign Currency Transactions and Translations Policy [Policy Text Block] Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Company Selected Measure Name Company Selected Measure Name Leases Lessee, Operating Leases [Text Block] Commercial paper Commercial Paper Notes and loans payable Notes and Loans Payable [Abstract] Adjustment for foreign exchange translation (gain)/loss included in net income Amounts reclassified from accumulated other comprehensive income Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax Foreign exchange rate changes Defined Benefit Plan, Plan Assets, Foreign Currency Translation Gain (Loss) Revisions Asset Retirement Obligation, Revision of Estimate Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Table] 4.114% notes due 2046 Four Point One One Four Notes Due 2046 [Member] 4.114% Notes Due 2046 [Member] United States income (loss) before income taxes Income (Loss) from Continuing Operations before Income Taxes, Domestic Net notional long / short position of derivative instruments bbl Derivative, Nonmonetary Notional Amount, Volume Total Balance at December 31 Total recorded Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position Remaining Tax Years Subject To Examination By Major Tax Jurisdiction Summary of Income Tax Examinations [Table Text Block] Vesting period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Proceeds from Sale of Productive Assets Proceeds from Sale of Productive Assets Project in Mozambique - Rovuma LNG Unitized Trains [Member] Costs Of Project In Rovuma LNG Unitized Trains [Member] Costs Of Project In Rovuma LNG Unitized Trains [Member] Name Measure Name Name Forgone Recovery, Individual Name Government Assistance, Affordable Fuel Pricing Government Assistance, Affordable Fuel Pricing [Member] Government Assistance, Affordable Fuel Pricing Additions for prior years' tax positions Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions Geographic Sales And Other Operating Revenue Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block] Income And Other Taxes [Table] Income And Other Taxes [Table] Income And Other Taxes [Table] Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Measurement Basis [Axis] Measurement Basis [Axis] Underlying Securities Award Underlying Securities Amount Total other taxes and duties Total Other Taxes And Duties Total other taxes and duties. Other [Member] Other Machinery and Equipment [Member] Other Comprehensive Income Information Comprehensive Income (Loss) Note [Text Block] Total Gross Assets & Liabilities [Domain] Fair Value Measurement [Domain] Forecast [Member] Forecast [Member] Earliest Tax Year [Member] Earliest Tax Year [Member] Common stock, without par value Common Stock, No Par Value Other long-term debt Other Long-Term Debt, Noncurrent Operating lease liability - noncurrent included in Other long-term obligations Operating Lease, Liability, Noncurrent Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Additional Working Capital Information Additional Working Capital Information [Text Block] Entire disclosure of additional working capital information presenting assets and liabilities. Payables to equity companies Payables to equity companies Payables to equity companies. Combined Exxon Mobil And Affiliates [Member] Combined Exxon Mobil And Affiliates [Member] Combined Exxon Mobil And Affiliates [Member] 1.408% Notes Due in 2039 [Member] One Point Four Zero Eight Percent Notes Due 2039 [Member] One Point Four Zero Eight Percent Notes Due 2039 Income Statement Location [Axis] Income Statement Location [Axis] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Postretirement benefits reserves Postretirement benefits reserves Liability, Defined Benefit Plan, Noncurrent Environmental Liabilities Asset Retirement Obligation and Environmental Cost [Policy Text Block] Commitments and Contingencies Commitments and Contingencies, Policy [Policy Text Block] Asset retirement obligations estimated cash payments in 2025 Asset Retirement Obligations Cash Paid To Settle Expected Payment Year Two Asset Retirement Obligations Cash Paid To Settle Expected Payment Year Two Maturity Analysis of Operating Leases Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Change in benefit obligation Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] Valuation Allowance [Abstract] Valuation Allowance [Abstract] Financial Instruments Fair Value, by Balance Sheet Grouping [Table Text Block] Income And Other Taxes [Abstract] Income And Other Taxes [Abstract] Product and Service [Domain] Product and Service [Domain] Other Performance Measure, Amount Other Performance Measure, Amount Finance leases & other obligations Finance Lease And Other Obligations [Member] Finance lease obligations. 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[Member] Reconciliation of Revenue from Segments to Consolidated [Table] Reconciliation of Revenue from Segments to Consolidated [Table] Proved developed and undeveloped reserve, net (energy) per day (barrel of oil equivalent per day) Proved Developed and Undeveloped Reserve, Net (Energy) per day Proved Developed and Undeveloped Reserve, Net (Energy) per day Reductions in long-term debt Repayments of Long-Term Debt Corporate And Financing [Member] Corporate And Financing Member [Member] Component of an entity that usually provides financial, operational, administrative support and financing support, and is considered an operating segment. Excludes intersegment elimination and reconciling items. 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Effect Of Counterparty Netting [Member] Effect Of Counterparty Netting [Member] Additions to property, plant and equipment Payments to Acquire Property, Plant, and Equipment Company Selected Measure Amount Company Selected Measure Amount Effects of foreign currency translation [Member] Foreign Currency and Other Effects [Member] Benefits payments expected in 2027 Defined Benefit Plan, Expected Future Benefit Payment, Year Four Total Assets Assets Name Awards Close in Time to MNPI Disclosures, Individual Name 2029 and beyond Finance Lease, Liability, to be Paid, after Year Five Dispositions Stock Issued During Period, Value, Treasury Stock Reissued Debt instrument, unamortized premium Debt Instrument, Unamortized Premium South Hook LNG Terminal Company Limited South Hook Lng Terminal Company Limited [Member] South Hook LNG Terminal Company Limited [Member] Other long-term financial liabilities Other Long Term Financial Liabilities Long-term debt maturing - 2028 Long-Term Debt, Maturity, Year Five Property, Plant And Equipment And Asset Retirement Obligations [Abstract] Property, Plant And Equipment And Asset Retirement Obligations [Abstract] 4.327% notes due 2050 FourPointThreeTwoSevenNotesDue2050 [Member] FourPointThreeTwoSevenNotesDue2050 3.043% notes due 2026 Three Point Zero Four Three Notes Due 2026 [Member] 3.043% Notes Due 2026 [Member] Vested (USD per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Non-NEOs Non-NEOs [Member] Project in Guyana - Whiptail [Member] Cost Of Project In Whiptail [Member] Cost Of Project In Whiptail Capitalized For A Period Of Between One And Five Years [Member] Aging of Capitalized Exploratory Well Costs, Period Two [Member] Open tax years by major tax jurisdiction Open Tax Year Government Assistance, Type [Domain] Government Assistance, Type [Domain] Defined Benefit Plan, Plan Assets, Category [Domain] Defined Benefit Plan, Plan Assets, Category [Domain] Postretirement Benefits Reserves Adjustment Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax [Abstract] Current liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities Pension Plans, Defined Benefit [Member] Pension Plan [Member] CASH FLOWS FROM FINANCING ACTIVITIES Net Cash Provided by (Used in) Financing Activities [Abstract] 0.524% notes due 2028 ZeroPointFiveTwoFourNotesDue2028 [Member] ZeroPointFiveTwoFourNotesDue2028 Total Other Comprehensive Income (Loss), Net of Tax, Period Change [Abstract] Non-PEO NEO Non-PEO NEO [Member] Target asset allocation Defined Benefit Plan, Plan Assets, Target Allocation, Percentage Adjustment to Compensation: Adjustment to Compensation [Axis] QatarEnergy LNG NFE (3) QatarEnergy LNG NFE (3) [Member] QatarEnergy LNG NFE (3) BEB Erdgas und Erdoel GmbH & Co. KG Beb Erdgas Und Erdoel Gmbh [Member] BEB Erdgas und Erdoel GmbH [Member] Change In Benefit Obligation Of Pension And Other Postretirement Benefits Schedule of Changes in Accumulated Postemployment Benefit Obligations [Table Text Block] Tax loss carryforwards Deferred Tax Assets, Operating Loss Carryforwards Long-term Debt [Line Items] Debt Instrument [Line Items] Scenario [Axis] Scenario [Axis] Weighted average number of common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Property, plant and equipment Deferred Tax Liabilities, Property, Plant and Equipment Investments, advances and long-term receivables Total Long-Term Investments and Receivables, Net Revenues and other income Revenues [Abstract] Long [Member] Long [Member] Remaining shares available for award under 2003 incentive program Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized Remaining Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized Remaining Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets [Abstract] Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets [Abstract] Potential percentage decrease in unrecognized tax benefits Percentage Decrease In Unrecognized Tax Benefits Lower end of range for reasonably possible change in unrecognized tax benefits over next 12 months Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Revenue outside the scope of ASC 606 Revenue Not from Contract with Customer, Excluding Interest Income Statement [Line Items] Statement [Line Items] Crude oil, products and merchandise Total Energy Related Inventory Disposal Group Not Discontinued Operation Gain Loss On Disposal, After Tax Disposal Group Not Discontinued Operation Gain Loss On Disposal, After Tax Disposal Group Not Discontinued Operation Gain Loss On Disposal, After Tax Change in net provisions [Member] Change in net provisions [Member] Amortization of actuarial (loss)/gain Changes In Amounts Recorded In Accumulated Other Comprehensive Income Loss Reclassification Adjustment From AOCI Pension And Other Postretirement Benefit Plans For Actuarial Gain Loss Before Tax Amount, before tax, of reclassification adjustment from accumulated other comprehensive income (loss) for actuarial gain (loss) of defined benefit plan. Schedule of Impaired Long-Lived Assets Held and Used And Impact Of Expropriation Schedule Of Impaired Long-Lived Assets Held And Used And Impact Of Expropriation [Table] Schedule Of Impaired Long-Lived Assets Held And Used And Impact Of Expropriation Percent of the shares in each award vesting after seven years Percent of the shares in each award vesting after seven years Percent Of The Shares In Each Award Vesting After Seven Years U.S. Equity Securities [Member] U S Equity Securities [Member] U.S. equity securities Unfunded plans Unfunded Plans Defined Benefit Plan, Unfunded Plan Unrecognized Tax Benefits [Roll Forward] Unrecognized Tax Benefits [Roll Forward] Unrecognized Tax Benefits Noncontrolling Interest [Member] Noncontrolling Interest [Member]