2.2.0.25truefalse40905 - Disclosure - Accounting for Suspended Exploratory Well Costs (Schedule of Additional Detail for the Projects) (Details)truefalseIn Millionsfalse1falsefalseUSDfalsefalse12/31/2010
USD ($)
USD ($) / shares
$As_Of_12_31_2010http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170Unit1Standardhttp://www.xbrl.org/2003/instancesharesxbrli0Unit13Dividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0Unit14Standardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$2falsefalseUSDfalsefalse12/31/2009
USD ($)
USD ($) / shares
$As_Of_12_31_2009http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170Unit14Standardhttp://www.xbrl.org/2003/instancepurexbrli0Unit1Standardhttp://www.xbrl.org/2003/instancesharesxbrli0Unit13Dividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0USDUSD$3falsefalseUSDfalsefalse12/31/2008
USD ($)
$As_Of_12_31_2008http://www.sec.gov/CIK0000034088instant2008-12-31T00:00:000001-01-01T00:00:00Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$4falsefalseUSDfalsefalse12/31/2007
USD ($)
$As_Of_12_31_2007http://www.sec.gov/CIK0000034088instant2007-12-31T00:00:000001-01-01T00:00:00Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2false0us-gaap_CapitalizedExploratoryWellCostsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsefalse28930000002893falsetruefalsefalsefalse2truefalsefalse20050000002005falsetruefalsefalsefalse3truefalsefalse15850000001585falsetruefalsefalsefalse4truefalsefalse12910000001291falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of capitalized exploratory well costs that is pending the determination of proved reserves. This should not include amounts that were capitalized and subsequently expensed in the same annual period.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS19-1
-Paragraph 10
-Subparagraph a
falsefalse3false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosureaccountingforsuspendedexploratorywellcostsscheduleofadditionaldetailforprojectsdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse5falsefalseUSDtruefalse{us-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxis} : Angola [Member]
{us-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxis} : Project in Angola - Perpetua-Zina- Acacia [Member]
12/31/2010
USD ($)
$As_Of_12_31_20109http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseAngola [Member]us-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxisxbrldihttp://xbrl.org/2006/xbrldixom_AngolaMemberus-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxisexplicitMemberfalsefalseProject in Angola - Perpetua-Zina- Acacia [Member]us-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxisxbrldihttp://xbrl.org/2006/xbrldixom_CostOfProjectInPerpetuaZinaAcaciaMemberus-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse4false0us-gaap_CapitalizedExploratoryWellCostsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsefalse1500000015falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of capitalized exploratory well costs that is pending the determination of proved reserves. This should not include amounts that were capitalized and subsequently expensed in the same annual period.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS19-1
-Paragraph 10
-Subparagraph a
falsefalse5false0xom_YearsWellsDrilledxomfalsenainstantYears Wells Drilledfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse002008 - 2009falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringYears Wells DrilledNo authoritative reference available.falsefalse6false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosureaccountingforsuspendedexploratorywellcostsscheduleofadditionaldetailforprojectsdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse6falsefalseUSDtruefalse{us-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxis} : Australia [Member]
{us-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxis} : Project in Australia - East Pilchard [Member]
12/31/2010
USD ($)
$As_Of_12_31_201010http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseAustralia [Member]us-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxisxbrldihttp://xbrl.org/2006/xbrldixom_AustraliaMemberus-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxisexplicitMemberfalsefalseProject in Australia - East Pilchard [Member]us-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxisxbrldihttp://xbrl.org/2006/xbrldixom_CostOfProjectInEastPilchardMemberus-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse7false0us-gaap_CapitalizedExploratoryWellCostsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsefalse1000000010falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of capitalized exploratory well costs that is pending the determination of proved reserves. This should not include amounts that were capitalized and subsequently expensed in the same annual period.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS19-1
-Paragraph 10
-Subparagraph a
falsefalse8false0xom_YearsWellsDrilledxomfalsenainstantYears Wells Drilledfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse002001falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringYears Wells DrilledNo authoritative reference available.falsefalse9false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosureaccountingforsuspendedexploratorywellcostsscheduleofadditionaldetailforprojectsdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse7falsefalseUSDtruefalse{us-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxis} : Indonesia [Member]
{us-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxis} : Project in Indonesia - Natuna [Member]
12/31/2010
USD ($)
$As_Of_12_31_201011http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseIndonesia [Member]us-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxisxbrldihttp://xbrl.org/2006/xbrldixom_IndonesiaMemberus-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxisexplicitMemberfalsefalseProject in Indonesia - Natuna [Member]us-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxisxbrldihttp://xbrl.org/2006/xbrldixom_CostOfProjectInNatunaMemberus-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse10false0us-gaap_CapitalizedExploratoryWellCostsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsefalse118000000118falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of capitalized exploratory well costs that is pending the determination of proved reserves. This should not include amounts that were capitalized and subsequently expensed in the same annual period.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS19-1
-Paragraph 10
-Subparagraph a
falsefalse11false0xom_YearsWellsDrilledxomfalsenainstantYears Wells Drilledfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse001981 - 1983falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringYears Wells DrilledNo authoritative reference available.falsefalse12false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosureaccountingforsuspendedexploratorywellcostsscheduleofadditionaldetailforprojectsdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse8falsefalseUSDtruefalse{us-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxis} : Kazakhstan [Member]
{us-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxis} : Project in Kazakhstan - Kairan [Member]
12/31/2010
USD ($)
$As_Of_12_31_201012http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseKazakhstan [Member]us-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxisxbrldihttp://xbrl.org/2006/xbrldixom_KazakhstanMemberus-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxisexplicitMemberfalsefalseProject in Kazakhstan - Kairan [Member]us-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxisxbrldihttp://xbrl.org/2006/xbrldixom_CostOfProjectInKairanMemberus-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse13false0us-gaap_CapitalizedExploratoryWellCostsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsefalse5300000053falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of capitalized exploratory well costs that is pending the determination of proved reserves. This should not include amounts that were capitalized and subsequently expensed in the same annual period.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS19-1
-Paragraph 10
-Subparagraph a
falsefalse14false0xom_YearsWellsDrilledxomfalsenainstantYears Wells Drilledfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse002004 - 2007falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringYears Wells DrilledNo authoritative reference available.falsefalse15false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosureaccountingforsuspendedexploratorywellcostsscheduleofadditionaldetailforprojectsdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse9falsefalseUSDtruefalse{us-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxis} : Nigeria [Member]
{us-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxis} : Project in Nigeria - Bolia [Member]
12/31/2010
USD ($)
$As_Of_12_31_201014http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseNigeria [Member]us-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxisxbrldihttp://xbrl.org/2006/xbrldixom_NigeriaMemberus-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxisexplicitMemberfalsefalseProject in Nigeria - Bolia [Member]us-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxisxbrldihttp://xbrl.org/2006/xbrldixom_CostOfProjectInBoliaMemberus-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse16false0us-gaap_CapitalizedExploratoryWellCostsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsefalse1500000015falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of capitalized exploratory well costs that is pending the determination of proved reserves. This should not include amounts that were capitalized and subsequently expensed in the same annual period.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS19-1
-Paragraph 10
-Subparagraph a
falsefalse17false0xom_YearsWellsDrilledxomfalsenainstantYears Wells Drilledfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse002002 - 2006falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringYears Wells DrilledNo authoritative reference available.falsefalse18false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosureaccountingforsuspendedexploratorywellcostsscheduleofadditionaldetailforprojectsdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse10falsefalseUSDtruefalse{us-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxis} : Nigeria [Member]
{us-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxis} : Project in Nigeria - Bonga North [Member]
12/31/2010
USD ($)
$As_Of_12_31_201015http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseNigeria [Member]us-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxisxbrldihttp://xbrl.org/2006/xbrldixom_NigeriaMemberus-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxisexplicitMemberfalsefalseProject in Nigeria - Bonga North [Member]us-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxisxbrldihttp://xbrl.org/2006/xbrldixom_CostOfProjectInBongaNorthMemberus-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse19false0us-gaap_CapitalizedExploratoryWellCostsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsefalse3400000034falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of capitalized exploratory well costs that is pending the determination of proved reserves. This should not include amounts that were capitalized and subsequently expensed in the same annual period.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS19-1
-Paragraph 10
-Subparagraph a
falsefalse20false0xom_YearsWellsDrilledxomfalsenainstantYears Wells Drilledfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse002004 - 2009falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringYears Wells DrilledNo authoritative reference available.falsefalse21false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosureaccountingforsuspendedexploratorywellcostsscheduleofadditionaldetailforprojectsdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse11falsefalseUSDtruefalse{us-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxis} : Nigeria [Member]
{us-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxis} : Project in Nigeria - Bosi [Member]
12/31/2010
USD ($)
$As_Of_12_31_201016http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseNigeria [Member]us-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxisxbrldihttp://xbrl.org/2006/xbrldixom_NigeriaMemberus-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxisexplicitMemberfalsefalseProject in Nigeria - Bosi [Member]us-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxisxbrldihttp://xbrl.org/2006/xbrldixom_CostOfProjectInBosiMemberus-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse22false0us-gaap_CapitalizedExploratoryWellCostsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsefalse7900000079falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of capitalized exploratory well costs that is pending the determination of proved reserves. This should not include amounts that were capitalized and subsequently expensed in the same annual period.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS19-1
-Paragraph 10
-Subparagraph a
falsefalse23false0xom_YearsWellsDrilledxomfalsenainstantYears Wells Drilledfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse002002 - 2006falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringYears Wells DrilledNo authoritative reference available.falsefalse24false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosureaccountingforsuspendedexploratorywellcostsscheduleofadditionaldetailforprojectsdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse12falsefalseUSDtruefalse{us-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxis} : Nigeria [Member]
{us-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxis} : Other 5 Projects in Nigeria [Member]
12/31/2010
USD ($)
$As_Of_12_31_201013http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseNigeria [Member]us-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxisxbrldihttp://xbrl.org/2006/xbrldixom_NigeriaMemberus-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxisexplicitMemberfalsefalseOther 5 Projects in Nigeria [Member]us-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxisxbrldihttp://xbrl.org/2006/xbrldixom_CostOfOtherFiveProjectsInNigeriaMemberus-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse25false0us-gaap_CapitalizedExploratoryWellCostsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsefalse1600000016falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of capitalized exploratory well costs that is pending the determination of proved reserves. This should not include amounts that were capitalized and subsequently expensed in the same annual period.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS19-1
-Paragraph 10
-Subparagraph a
falsefalse26false0xom_YearsWellsDrilledxomfalsenainstantYears Wells Drilledfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse002001 - 2002falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringYears Wells DrilledNo authoritative reference available.falsefalse27false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosureaccountingforsuspendedexploratorywellcostsscheduleofadditionaldetailforprojectsdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse13falsefalseUSDtruefalse{us-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxis} : Norway [Member]
{us-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxis} : Project in Norway - Gamma [Member]
12/31/2010
USD ($)
$As_Of_12_31_201018http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseNorway [Member]us-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxisxbrldihttp://xbrl.org/2006/xbrldixom_NorwayMemberus-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxisexplicitMemberfalsefalseProject in Norway - Gamma [Member]us-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxisxbrldihttp://xbrl.org/2006/xbrldixom_CostOfProjectInGammaMemberus-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse28false0us-gaap_CapitalizedExploratoryWellCostsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsefalse2000000020falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of capitalized exploratory well costs that is pending the determination of proved reserves. This should not include amounts that were capitalized and subsequently expensed in the same annual period.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS19-1
-Paragraph 10
-Subparagraph a
falsefalse29false0xom_YearsWellsDrilledxomfalsenainstantYears Wells Drilledfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse002008 - 2009falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringYears Wells DrilledNo authoritative reference available.falsefalse30false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosureaccountingforsuspendedexploratorywellcostsscheduleofadditionaldetailforprojectsdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse14falsefalseUSDtruefalse{us-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxis} : Norway [Member]
{us-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxis} : Project in Norway - H-North [Member]
12/31/2010
USD ($)
$As_Of_12_31_201019http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseNorway [Member]us-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxisxbrldihttp://xbrl.org/2006/xbrldixom_NorwayMemberus-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxisexplicitMemberfalsefalseProject in Norway - H-North [Member]us-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxisxbrldihttp://xbrl.org/2006/xbrldixom_CostOfProjectInHNorthMemberus-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse31false0us-gaap_CapitalizedExploratoryWellCostsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsefalse1500000015falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of capitalized exploratory well costs that is pending the determination of proved reserves. This should not include amounts that were capitalized and subsequently expensed in the same annual period.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS19-1
-Paragraph 10
-Subparagraph a
falsefalse32false0xom_YearsWellsDrilledxomfalsenainstantYears Wells Drilledfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse002007falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringYears Wells DrilledNo authoritative reference available.falsefalse33false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosureaccountingforsuspendedexploratorywellcostsscheduleofadditionaldetailforprojectsdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse15falsefalseUSDtruefalse{us-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxis} : Norway [Member]
{us-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxis} : Project in Norway - Lavrans [Member]
12/31/2010
USD ($)
$As_Of_12_31_201020http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseNorway [Member]us-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxisxbrldihttp://xbrl.org/2006/xbrldixom_NorwayMemberus-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxisexplicitMemberfalsefalseProject in Norway - Lavrans [Member]us-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxisxbrldihttp://xbrl.org/2006/xbrldixom_CostOfProjectInLavransMemberus-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse34false0us-gaap_CapitalizedExploratoryWellCostsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsefalse2300000023falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of capitalized exploratory well costs that is pending the determination of proved reserves. This should not include amounts that were capitalized and subsequently expensed in the same annual period.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS19-1
-Paragraph 10
-Subparagraph a
falsefalse35false0xom_YearsWellsDrilledxomfalsenainstantYears Wells Drilledfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse001995 - 1999falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringYears Wells DrilledNo authoritative reference available.falsefalse36false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosureaccountingforsuspendedexploratorywellcostsscheduleofadditionaldetailforprojectsdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse16falsefalseUSDtruefalse{us-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxis} : Norway [Member]
{us-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxis} : Project in Norway - Noatun [Member]
12/31/2010
USD ($)
$As_Of_12_31_201021http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseNorway [Member]us-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxisxbrldihttp://xbrl.org/2006/xbrldixom_NorwayMemberus-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxisexplicitMemberfalsefalseProject in Norway - Noatun [Member]us-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxisxbrldihttp://xbrl.org/2006/xbrldixom_CostOfProjectInNoatunMemberus-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse37false0us-gaap_CapitalizedExploratoryWellCostsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsefalse1900000019falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of capitalized exploratory well costs that is pending the determination of proved reserves. This should not include amounts that were capitalized and subsequently expensed in the same annual period.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS19-1
-Paragraph 10
-Subparagraph a
falsefalse38false0xom_YearsWellsDrilledxomfalsenainstantYears Wells Drilledfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse002008falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringYears Wells DrilledNo authoritative reference available.falsefalse39false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosureaccountingforsuspendedexploratorywellcostsscheduleofadditionaldetailforprojectsdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse17falsefalseUSDtruefalse{us-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxis} : Norway [Member]
{us-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxis} : Project in Norway - Nyk High [Member]
12/31/2010
USD ($)
$As_Of_12_31_201022http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseNorway [Member]us-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxisxbrldihttp://xbrl.org/2006/xbrldixom_NorwayMemberus-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxisexplicitMemberfalsefalseProject in Norway - Nyk High [Member]us-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxisxbrldihttp://xbrl.org/2006/xbrldixom_CostOfProjectInNykHighMemberus-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse40false0us-gaap_CapitalizedExploratoryWellCostsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsefalse2000000020falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of capitalized exploratory well costs that is pending the determination of proved reserves. This should not include amounts that were capitalized and subsequently expensed in the same annual period.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS19-1
-Paragraph 10
-Subparagraph a
falsefalse41false0xom_YearsWellsDrilledxomfalsenainstantYears Wells Drilledfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse002008falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringYears Wells DrilledNo authoritative reference available.falsefalse42false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosureaccountingforsuspendedexploratorywellcostsscheduleofadditionaldetailforprojectsdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse18falsefalseUSDtruefalse{us-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxis} : Norway [Member]
{us-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxis} : Other 8 Projects in Norway [Member]
12/31/2010
USD ($)
$As_Of_12_31_201017http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseNorway [Member]us-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxisxbrldihttp://xbrl.org/2006/xbrldixom_NorwayMemberus-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxisexplicitMemberfalsefalseOther 8 Projects in Norway [Member]us-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxisxbrldihttp://xbrl.org/2006/xbrldixom_CostOfOtherEightProjectsInNorwayMemberus-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse43false0us-gaap_CapitalizedExploratoryWellCostsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsefalse3400000034falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of capitalized exploratory well costs that is pending the determination of proved reserves. This should not include amounts that were capitalized and subsequently expensed in the same annual period.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS19-1
-Paragraph 10
-Subparagraph a
falsefalse44false0xom_YearsWellsDrilledxomfalsenainstantYears Wells Drilledfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse001992 - 2009falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringYears Wells DrilledNo authoritative reference available.falsefalse45false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosureaccountingforsuspendedexploratorywellcostsscheduleofadditionaldetailforprojectsdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse19falsefalseUSDtruefalse{us-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxis} : Papua New Guinea [Member]
{us-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxis} : Project in Papua New Guinea - Juha [Member]
12/31/2010
USD ($)
$As_Of_12_31_201024http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePapua New Guinea [Member]us-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxisxbrldihttp://xbrl.org/2006/xbrldixom_PapuaNewGuineaMemberus-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxisexplicitMemberfalsefalseProject in Papua New Guinea - Juha [Member]us-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxisxbrldihttp://xbrl.org/2006/xbrldixom_CostOfProjectInJuhaMemberus-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse46false0us-gaap_CapitalizedExploratoryWellCostsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsefalse2800000028falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of capitalized exploratory well costs that is pending the determination of proved reserves. This should not include amounts that were capitalized and subsequently expensed in the same annual period.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS19-1
-Paragraph 10
-Subparagraph a
falsefalse47false0xom_YearsWellsDrilledxomfalsenainstantYears Wells Drilledfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse002007falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringYears Wells DrilledNo authoritative reference available.falsefalse48false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosureaccountingforsuspendedexploratorywellcostsscheduleofadditionaldetailforprojectsdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse20falsefalseUSDtruefalse{us-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxis} : United Kingdom [Member]
{us-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxis} : Project in United Kingdom - Fram [Member]
12/31/2010
USD ($)
$As_Of_12_31_201026http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseUnited Kingdom [Member]us-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxisxbrldihttp://xbrl.org/2006/xbrldixom_UnitedKingdomMemberus-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxisexplicitMemberfalsefalseProject in United Kingdom - Fram [Member]us-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxisxbrldihttp://xbrl.org/2006/xbrldixom_CostOfProjectInFramMemberus-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse49false0us-gaap_CapitalizedExploratoryWellCostsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsefalse5500000055falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of capitalized exploratory well costs that is pending the determination of proved reserves. This should not include amounts that were capitalized and subsequently expensed in the same annual period.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS19-1
-Paragraph 10
-Subparagraph a
falsefalse50false0xom_YearsWellsDrilledxomfalsenainstantYears Wells Drilledfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse002009falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringYears Wells DrilledNo authoritative reference available.falsefalse51false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosureaccountingforsuspendedexploratorywellcostsscheduleofadditionaldetailforprojectsdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse21falsefalseUSDtruefalse{us-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxis} : United Kingdom [Member]
{us-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxis} : Other 3 Projects in United Kingdom [Member]
12/31/2010
USD ($)
$As_Of_12_31_201025http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseUnited Kingdom [Member]us-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxisxbrldihttp://xbrl.org/2006/xbrldixom_UnitedKingdomMemberus-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxisexplicitMemberfalsefalseOther 3 Projects in United Kingdom [Member]us-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxisxbrldihttp://xbrl.org/2006/xbrldixom_CostOfOtherThreeProjectsInUnitedKingdomMemberus-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse52false0us-gaap_CapitalizedExploratoryWellCostsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsefalse2100000021falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of capitalized exploratory well costs that is pending the determination of proved reserves. This should not include amounts that were capitalized and subsequently expensed in the same annual period.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS19-1
-Paragraph 10
-Subparagraph a
falsefalse53false0xom_YearsWellsDrilledxomfalsenainstantYears Wells Drilledfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse002001 - 2008falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringYears Wells DrilledNo authoritative reference available.falsefalse54false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosureaccountingforsuspendedexploratorywellcostsscheduleofadditionaldetailforprojectsdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse22falsefalseUSDtruefalse{us-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxis} : United States [Member]
{us-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxis} : Project in United States - Julia Unit [Member]
12/31/2010
USD ($)
$As_Of_12_31_201027http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseUnited States [Member]us-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxisxbrldihttp://xbrl.org/2006/xbrldixom_UnitedStatesMemberus-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxisexplicitMemberfalsefalseProject in United States - Julia Unit [Member]us-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxisxbrldihttp://xbrl.org/2006/xbrldixom_CostOfProjectInJuliaMemberus-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse55false0us-gaap_CapitalizedExploratoryWellCostsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsefalse7800000078falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of capitalized exploratory well costs that is pending the determination of proved reserves. This should not include amounts that were capitalized and subsequently expensed in the same annual period.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS19-1
-Paragraph 10
-Subparagraph a
falsefalse56false0xom_YearsWellsDrilledxomfalsenainstantYears Wells Drilledfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse002007 - 2008falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringYears Wells DrilledNo authoritative reference available.falsefalse57false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosureaccountingforsuspendedexploratorywellcostsscheduleofadditionaldetailforprojectsdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse23falsefalseUSDtruefalse{us-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxis} : United States [Member]
{us-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxis} : Project in United States - Tip Top [Member]
12/31/2010
USD ($)
$As_Of_12_31_201028http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseUnited States [Member]us-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxisxbrldihttp://xbrl.org/2006/xbrldixom_UnitedStatesMemberus-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxisexplicitMemberfalsefalseProject in United States - Tip Top [Member]us-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxisxbrldihttp://xbrl.org/2006/xbrldixom_CostOfProjectInTipTopMemberus-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse58false0us-gaap_CapitalizedExploratoryWellCostsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsefalse3100000031falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of capitalized exploratory well costs that is pending the determination of proved reserves. This should not include amounts that were capitalized and subsequently expensed in the same annual period.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS19-1
-Paragraph 10
-Subparagraph a
falsefalse59false0xom_YearsWellsDrilledxomfalsenainstantYears Wells Drilledfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse002009falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringYears Wells DrilledNo authoritative reference available.falsefalse60false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosureaccountingforsuspendedexploratorywellcostsscheduleofadditionaldetailforprojectsdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse24falsefalseUSDtruefalse{us-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxis} : Other Countries [Member]
{us-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxis} : Other - Various 2 Projects [Member]
12/31/2010
USD ($)
$As_Of_12_31_201023http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseOther Countries [Member]us-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxisxbrldihttp://xbrl.org/2006/xbrldixom_OtherCountriesMemberus-gaap_CapitalizedCostsRelatingToOilAndGasProducingActivitiesByGeographicAreaAxisexplicitMemberfalsefalseOther - Various 2 Projects [Member]us-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxisxbrldihttp://xbrl.org/2006/xbrldixom_CostOfOtherProjectsMemberus-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse61false0us-gaap_CapitalizedExploratoryWellCostsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsefalse80000008falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of capitalized exploratory well costs that is pending the determination of proved reserves. This should not include amounts that were capitalized and subsequently expensed in the same annual period.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS19-1
-Paragraph 10
-Subparagraph a
falsefalse62false0xom_YearsWellsDrilledxomfalsenainstantYears Wells Drilledfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse001979 - 1995falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringYears Wells DrilledNo authoritative reference available.falsefalse63false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosureaccountingforsuspendedexploratorywellcostsscheduleofadditionaldetailforprojectsdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalse25falsefalseUSDtruefalse{us-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxis} : Total 34 Projects [Member]
12/31/2010
USD ($)
$As_Of_12_31_20108http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseTotal 34 Projects [Member]us-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxisxbrldihttp://xbrl.org/2006/xbrldixom_TotalThirtyFourProjectsMemberus-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearByProjectAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse64false0us-gaap_CapitalizedExploratoryWellCostsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsefalse692000000692falsetruefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of capitalized exploratory well costs that is pending the determination of proved reserves. This should not include amounts that were capitalized and subsequently expensed in the same annual period.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS19-1
-Paragraph 10
-Subparagraph a
falsefalse463Accounting for Suspended Exploratory Well Costs (Schedule of Additional Detail for the Projects) (Details) (USD $)MillionsUnKnownUnKnownUnKnownfalsetrue
