0000034088-21-000051 | 10-Q | XBRL Viewer

Document And Entity Information	6 Months Ended
Document And Entity Information	Jun. 30, 2021 shares
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2021
Document Transition Report	false
Entity File Number	1-2256
Entity Registrant Name	Exxon Mobil Corporation
Entity Incorporation, State or Country Code	NJ
Entity Tax Identification Number	13-5409005
Entity Address, Address Line One	5959 Las Colinas Boulevard
Entity Address, City or Town	Irving
Entity Address State or Province	TX
Entity Address, Postal Zip Code	75039-2298
City Area Code	972
Local Phone Number	940-6000
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding	4,233,562,917
Amendment Flag	false
Entity Central Index Key	0000034088
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q2
Current Fiscal Year End Date	--12-31

Label	Element	Value
Dividends Common Stock Inc Noncontrolling Int	xom_DividendsCommonStockIncNoncontrollingInt	$ 3,763,000,000
Dividends Common Stock Inc Noncontrolling Int	xom_DividendsCommonStockIncNoncontrollingInt	3,781,000,000
Dividends Common Stock Inc Noncontrolling Int	xom_DividendsCommonStockIncNoncontrollingInt	7,527,000,000
Dividends Common Stock Inc Noncontrolling Int	xom_DividendsCommonStockIncNoncontrollingInt	$ 7,553,000,000
Trading Symbol	dei_TradingSymbol	XOM
Trading Symbol	dei_TradingSymbol	XOM24B
Trading Symbol	dei_TradingSymbol	XOM28
Trading Symbol	dei_TradingSymbol	XOM32
Trading Symbol	dei_TradingSymbol	XOM39A
Other Comprehensive Income Postretirement Benefits Recognized In Net Periodic Pension Cost Net Of Tax	xom_OtherComprehensiveIncomePostretirementBenefitsRecognizedInNetPeriodicPensionCostNetOfTax	$ 215,000,000
Other Comprehensive Income Postretirement Benefits Recognized In Net Periodic Pension Cost Net Of Tax	xom_OtherComprehensiveIncomePostretirementBenefitsRecognizedInNetPeriodicPensionCostNetOfTax	203,000,000
Other Comprehensive Income Postretirement Benefits Recognized In Net Periodic Pension Cost Net Of Tax	xom_OtherComprehensiveIncomePostretirementBenefitsRecognizedInNetPeriodicPensionCostNetOfTax	593,000,000
Other Comprehensive Income Postretirement Benefits Recognized In Net Periodic Pension Cost Net Of Tax	xom_OtherComprehensiveIncomePostretirementBenefitsRecognizedInNetPeriodicPensionCostNetOfTax	407,000,000
Other Comprehensive Income Postretirement Benefits Recognized In Net Periodic Pension Cost Net Of Tax	xom_OtherComprehensiveIncomePostretirementBenefitsRecognizedInNetPeriodicPensionCostNetOfTax	390,000,000
Other Comprehensive Income Postretirement Benefits Recognized In Net Periodic Pension Cost Net Of Tax	xom_OtherComprehensiveIncomePostretirementBenefitsRecognizedInNetPeriodicPensionCostNetOfTax	575,000,000
Intersegment Revenue	xom_IntersegmentRevenue	3,827,000,000
Intersegment Revenue	xom_IntersegmentRevenue	1,378,000,000
Intersegment Revenue	xom_IntersegmentRevenue	7,150,000,000
Intersegment Revenue	xom_IntersegmentRevenue	3,651,000,000
Intersegment Revenue	xom_IntersegmentRevenue	7,747,000,000
Intersegment Revenue	xom_IntersegmentRevenue	2,852,000,000
Intersegment Revenue	xom_IntersegmentRevenue	14,564,000,000
Intersegment Revenue	xom_IntersegmentRevenue	9,239,000,000
Intersegment Revenue	xom_IntersegmentRevenue	5,438,000,000
Intersegment Revenue	xom_IntersegmentRevenue	2,056,000,000
Intersegment Revenue	xom_IntersegmentRevenue	9,391,000,000
Intersegment Revenue	xom_IntersegmentRevenue	6,008,000,000
Intersegment Revenue	xom_IntersegmentRevenue	5,505,000,000
Intersegment Revenue	xom_IntersegmentRevenue	2,752,000,000
Intersegment Revenue	xom_IntersegmentRevenue	10,886,000,000
Intersegment Revenue	xom_IntersegmentRevenue	7,876,000,000
Intersegment Revenue	xom_IntersegmentRevenue	2,488,000,000
Intersegment Revenue	xom_IntersegmentRevenue	1,220,000,000
Intersegment Revenue	xom_IntersegmentRevenue	4,438,000,000
Intersegment Revenue	xom_IntersegmentRevenue	2,986,000,000
Intersegment Revenue	xom_IntersegmentRevenue	1,342,000,000
Intersegment Revenue	xom_IntersegmentRevenue	708,000,000
Intersegment Revenue	xom_IntersegmentRevenue	2,573,000,000
Intersegment Revenue	xom_IntersegmentRevenue	1,971,000,000
Intersegment Revenue	xom_IntersegmentRevenue	52,000,000
Intersegment Revenue	xom_IntersegmentRevenue	56,000,000
Intersegment Revenue	xom_IntersegmentRevenue	109,000,000
Intersegment Revenue	xom_IntersegmentRevenue	111,000,000
Production and manufacturing expenses	xom_ProductionAndManufacturingExpenses	8,471,000,000
Production and manufacturing expenses	xom_ProductionAndManufacturingExpenses	6,895,000,000
Production and manufacturing expenses	xom_ProductionAndManufacturingExpenses	16,533,000,000
Production and manufacturing expenses	xom_ProductionAndManufacturingExpenses	15,192,000,000
Treasury Stock Including Non controlling interests	xom_TreasuryStockIncludingNonControllingInterests	293,000,000
Treasury Stock Including Non controlling interests	xom_TreasuryStockIncludingNonControllingInterests	368,000,000
Treasury Stock Including Non controlling interests	xom_TreasuryStockIncludingNonControllingInterests	294,000,000
Defined Benefit Plan Amortization of Actuarial Loss Gain and Prior Service Cost Credit	xom_DefinedBenefitPlanAmortizationOfActuarialLossGainAndPriorServiceCostCredit	55,000,000
Defined Benefit Plan Amortization of Actuarial Loss Gain and Prior Service Cost Credit	xom_DefinedBenefitPlanAmortizationOfActuarialLossGainAndPriorServiceCostCredit	79,000,000
Defined Benefit Plan Amortization of Actuarial Loss Gain and Prior Service Cost Credit	xom_DefinedBenefitPlanAmortizationOfActuarialLossGainAndPriorServiceCostCredit	110,000,000
Defined Benefit Plan Amortization of Actuarial Loss Gain and Prior Service Cost Credit	xom_DefinedBenefitPlanAmortizationOfActuarialLossGainAndPriorServiceCostCredit	158,000,000
Defined Benefit Plan Amortization of Actuarial Loss Gain and Prior Service Cost Credit	xom_DefinedBenefitPlanAmortizationOfActuarialLossGainAndPriorServiceCostCredit	121,000,000
Defined Benefit Plan Amortization of Actuarial Loss Gain and Prior Service Cost Credit	xom_DefinedBenefitPlanAmortizationOfActuarialLossGainAndPriorServiceCostCredit	115,000,000
Defined Benefit Plan Amortization of Actuarial Loss Gain and Prior Service Cost Credit	xom_DefinedBenefitPlanAmortizationOfActuarialLossGainAndPriorServiceCostCredit	244,000,000
Defined Benefit Plan Amortization of Actuarial Loss Gain and Prior Service Cost Credit	xom_DefinedBenefitPlanAmortizationOfActuarialLossGainAndPriorServiceCostCredit	234,000,000
Defined Benefit Plan Amortization of Actuarial Loss Gain and Prior Service Cost Credit	xom_DefinedBenefitPlanAmortizationOfActuarialLossGainAndPriorServiceCostCredit	9,000,000
Defined Benefit Plan Amortization of Actuarial Loss Gain and Prior Service Cost Credit	xom_DefinedBenefitPlanAmortizationOfActuarialLossGainAndPriorServiceCostCredit	14,000,000
Defined Benefit Plan Amortization of Actuarial Loss Gain and Prior Service Cost Credit	xom_DefinedBenefitPlanAmortizationOfActuarialLossGainAndPriorServiceCostCredit	17,000,000
Defined Benefit Plan Amortization of Actuarial Loss Gain and Prior Service Cost Credit	xom_DefinedBenefitPlanAmortizationOfActuarialLossGainAndPriorServiceCostCredit	26,000,000
Long Term Obligations To Equity Companies	xom_LongTermObligationsToEquityCompanies	3,337,000,000
Long Term Obligations To Equity Companies	xom_LongTermObligationsToEquityCompanies	3,337,000,000
Long Term Obligations To Equity Companies	xom_LongTermObligationsToEquityCompanies	(299,000,000)
Long Term Obligations To Equity Companies	xom_LongTermObligationsToEquityCompanies	3,038,000,000
Long Term Obligations To Equity Companies	xom_LongTermObligationsToEquityCompanies	3,530,000,000
Long Term Obligations To Equity Companies	xom_LongTermObligationsToEquityCompanies	3,530,000,000
Long Term Obligations To Equity Companies	xom_LongTermObligationsToEquityCompanies	(277,000,000)
Long Term Obligations To Equity Companies	xom_LongTermObligationsToEquityCompanies	3,253,000,000
Other Long Term Financial Liabilities	xom_OtherLongTermFinancialLiabilities	972,000,000
Other Long Term Financial Liabilities	xom_OtherLongTermFinancialLiabilities	972,000,000
Other Long Term Financial Liabilities	xom_OtherLongTermFinancialLiabilities	57,000,000
Other Long Term Financial Liabilities	xom_OtherLongTermFinancialLiabilities	1,029,000,000
Other Long Term Financial Liabilities	xom_OtherLongTermFinancialLiabilities	964,000,000
Other Long Term Financial Liabilities	xom_OtherLongTermFinancialLiabilities	964,000,000
Other Long Term Financial Liabilities	xom_OtherLongTermFinancialLiabilities	44,000,000
Other Long Term Financial Liabilities	xom_OtherLongTermFinancialLiabilities	$ 1,008,000,000
Security Exchange Name	dei_SecurityExchangeName	NYSE
Security Exchange Name	dei_SecurityExchangeName	NYSE
Security Exchange Name	dei_SecurityExchangeName	NYSE
Security Exchange Name	dei_SecurityExchangeName	NYSE
Security Exchange Name	dei_SecurityExchangeName	NYSE
Amortization Of Stock Based Awards	xom_AmortizationOfStockBasedAwards	$ 177,000,000
Amortization Of Stock Based Awards	xom_AmortizationOfStockBasedAwards	177,000,000
Amortization Of Stock Based Awards	xom_AmortizationOfStockBasedAwards	177,000,000
Amortization Of Stock Based Awards	xom_AmortizationOfStockBasedAwards	126,000,000
Amortization Of Stock Based Awards	xom_AmortizationOfStockBasedAwards	126,000,000
Amortization Of Stock Based Awards	xom_AmortizationOfStockBasedAwards	126,000,000
Amortization Of Stock Based Awards	xom_AmortizationOfStockBasedAwards	358,000,000
Amortization Of Stock Based Awards	xom_AmortizationOfStockBasedAwards	358,000,000
Amortization Of Stock Based Awards	xom_AmortizationOfStockBasedAwards	358,000,000
Amortization Of Stock Based Awards	xom_AmortizationOfStockBasedAwards	328,000,000
Amortization Of Stock Based Awards	xom_AmortizationOfStockBasedAwards	328,000,000
Amortization Of Stock Based Awards	xom_AmortizationOfStockBasedAwards	$ 328,000,000
Title of 12(b) Security	dei_Security12bTitle	Common Stock, without par value
Title of 12(b) Security	dei_Security12bTitle	0.142% Notes due 2024
Title of 12(b) Security	dei_Security12bTitle	0.524% Notes due 2028
Title of 12(b) Security	dei_Security12bTitle	0.835% Notes due 2032
Title of 12(b) Security	dei_Security12bTitle	1.408% Notes due 2039
Crude oil and product purchases	xom_CrudeOilAndProductPurchases	$ 37,329,000,000
Crude oil and product purchases	xom_CrudeOilAndProductPurchases	14,069,000,000
Crude oil and product purchases	xom_CrudeOilAndProductPurchases	69,930,000,000
Crude oil and product purchases	xom_CrudeOilAndProductPurchases	46,152,000,000
Crude oil and product purchases	xom_CrudeOilAndProductPurchases	(20,000,000)
Crude oil and product purchases	xom_CrudeOilAndProductPurchases	(178,000,000)
Crude oil and product purchases	xom_CrudeOilAndProductPurchases	(19,000,000)
Crude oil and product purchases	xom_CrudeOilAndProductPurchases	(530,000,000)
Advances To Receivables From Equity Companies	xom_AdvancesToReceivablesFromEquityCompanies	3,167,000,000
Advances To Receivables From Equity Companies	xom_AdvancesToReceivablesFromEquityCompanies	5,727,000,000
Advances To Receivables From Equity Companies	xom_AdvancesToReceivablesFromEquityCompanies	8,894,000,000
Advances To Receivables From Equity Companies	xom_AdvancesToReceivablesFromEquityCompanies	(291,000,000)
Advances To Receivables From Equity Companies	xom_AdvancesToReceivablesFromEquityCompanies	8,603,000,000
Advances To Receivables From Equity Companies	xom_AdvancesToReceivablesFromEquityCompanies	3,275,000,000
Advances To Receivables From Equity Companies	xom_AdvancesToReceivablesFromEquityCompanies	5,904,000,000
Advances To Receivables From Equity Companies	xom_AdvancesToReceivablesFromEquityCompanies	9,179,000,000
Advances To Receivables From Equity Companies	xom_AdvancesToReceivablesFromEquityCompanies	(367,000,000)
Advances To Receivables From Equity Companies	xom_AdvancesToReceivablesFromEquityCompanies	8,812,000,000
Inventory Write Down After Tax Parent Only Effect	xom_InventoryWriteDownAfterTaxParentOnlyEffect	(1,922,000,000)
Additional Investments And Advances	xom_AdditionalInvestmentsAndAdvances	613,000,000
Additional Investments And Advances	xom_AdditionalInvestmentsAndAdvances	1,524,000,000
Cumulative Effect Of Accounting Change	xom_CumulativeEffectOfAccountingChange	(93,000,000)
Cumulative Effect Of Accounting Change	xom_CumulativeEffectOfAccountingChange	(93,000,000)
Cumulative Effect Of Accounting Change	xom_CumulativeEffectOfAccountingChange	(1,000,000)
Cumulative Effect Of Accounting Change	xom_CumulativeEffectOfAccountingChange	$ (94,000,000)
Treasury Shares Acquired And Restricted Stock Forfeitures	xom_TreasurySharesAcquiredAndRestrictedStockForfeitures	6,000,000
Treasury Shares Acquired And Restricted Stock Forfeitures	xom_TreasurySharesAcquiredAndRestrictedStockForfeitures	6,000,000
Defined Benefit Plan Amortization Of Actuarial Loss Gain And Prior Service Cost Credit And Recognized Net Gain Loss Due To Settlements And Curtailments	xom_DefinedBenefitPlanAmortizationOfActuarialLossGainAndPriorServiceCostCreditAndRecognizedNetGainLossDueToSettlementsAndCurtailments	$ (280,000,000)
Defined Benefit Plan Amortization Of Actuarial Loss Gain And Prior Service Cost Credit And Recognized Net Gain Loss Due To Settlements And Curtailments	xom_DefinedBenefitPlanAmortizationOfActuarialLossGainAndPriorServiceCostCreditAndRecognizedNetGainLossDueToSettlementsAndCurtailments	(260,000,000)
Defined Benefit Plan Amortization Of Actuarial Loss Gain And Prior Service Cost Credit And Recognized Net Gain Loss Due To Settlements And Curtailments	xom_DefinedBenefitPlanAmortizationOfActuarialLossGainAndPriorServiceCostCreditAndRecognizedNetGainLossDueToSettlementsAndCurtailments	(764,000,000)
Defined Benefit Plan Amortization Of Actuarial Loss Gain And Prior Service Cost Credit And Recognized Net Gain Loss Due To Settlements And Curtailments	xom_DefinedBenefitPlanAmortizationOfActuarialLossGainAndPriorServiceCostCreditAndRecognizedNetGainLossDueToSettlementsAndCurtailments	(522,000,000)
Other Comprehensive Income Loss Net Investment Hedge Gain Loss Net Of Tax	xom_OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossNetOfTax	135,000,000
Other Comprehensive Income Loss Net Investment Hedge Gain Loss Net Of Tax	xom_OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossNetOfTax	5,000,000
Long Term Fair Value Debt	xom_LongTermFairValueDebt	46,787,000,000
Long Term Fair Value Debt	xom_LongTermFairValueDebt	100,000,000
Long Term Fair Value Debt	xom_LongTermFairValueDebt	4,000,000
Long Term Fair Value Debt	xom_LongTermFairValueDebt	46,891,000,000
Long Term Fair Value Debt	xom_LongTermFairValueDebt	(3,376,000,000)
Long Term Fair Value Debt	xom_LongTermFairValueDebt	43,515,000,000
Long Term Fair Value Debt	xom_LongTermFairValueDebt	50,263,000,000
Long Term Fair Value Debt	xom_LongTermFairValueDebt	125,000,000
Long Term Fair Value Debt	xom_LongTermFairValueDebt	4,000,000
Long Term Fair Value Debt	xom_LongTermFairValueDebt	50,392,000,000
Long Term Fair Value Debt	xom_LongTermFairValueDebt	(4,890,000,000)
Long Term Fair Value Debt	xom_LongTermFairValueDebt	45,502,000,000
Earlier Cerro Negro Award For Breach Of Contractual Obligations	xom_EarlierCerroNegroAwardForBreachOfContractualObligations	908,000,000
Retained Portion Of Award For Cerro Negro Project	xom_RetainedPortionOfAwardForCerroNegroProject	260,000,000
Annulled Portion Of Award For Cerro Negro Project	xom_AnnulledPortionOfAwardForCerroNegroProject	1,400,000,000
Award Of Damage Relating To Lifting Of Crude In Excess Of Entitlement	xom_AwardOfDamageRelatingToLiftingOfCrudeInExcessOfEntitlement	1,800,000,000
Interest Relating To Award Of Damages For Excess Use Of Natural Resources	xom_InterestRelatingToAwardOfDamagesForExcessUseOfNaturalResources	234,000,000
DisposalGroupIncludingDiscontinuedOperationContingentConsideration	xom_DisposalGroupIncludingDiscontinuedOperationContingentConsideration	300,000,000
ExpectedRangeOfProceedsFromDivestitureOfBusiness	xom_ExpectedRangeOfProceedsFromDivestitureOfBusiness	700,000,000
ExpectedRangeOfProceedsFromDivestitureOfBusiness	xom_ExpectedRangeOfProceedsFromDivestitureOfBusiness	1,200,000,000
ExpectedRangeOfProceedsFromDivestitureOfBusiness	xom_ExpectedRangeOfProceedsFromDivestitureOfBusiness	$ 900,000,000
SitesToBeDivested	xom_SitesToBeDivested	2

Financial Instruments and Derivatives (Narrative) (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Financial Instruments And Derivatives [Abstract]
Initial margin collateral receivable	$ 495	$ 504

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