2.2.0.25truefalse41808 - Disclosure - Income, Sales-Based and Other Taxes (Remaining Tax Years Subject to Examination by Major Tax Jurisdiction) (Details)truefalsefalse1falsefalsetruefalse{us-gaap_StatementGeographicalAxis} : Abu Dhabi [Member]
1/1/2010 - 12/31/2010
Duration_1_1_2010_To_12_31_201033732http://www.sec.gov/CIK0000034088duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseAbu Dhabi [Member]us-gaap_StatementGeographicalAxisxbrldihttp://xbrl.org/2006/xbrldixom_AbuDhabiMemberus-gaap_StatementGeographicalAxisexplicitMember1false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosureincomesalesbasedandothertaxesremainingtaxyearssubjecttoexaminationbymajortaxjurisdictiondetails1falsefalsefalse00falsefalsefalsefalsefalse1falsefalsetruefalse{us-gaap_StatementGeographicalAxis} : Abu Dhabi [Member]
1/1/2010 - 12/31/2010
Duration_1_1_2010_To_12_31_201033732http://www.sec.gov/CIK0000034088duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseAbu Dhabi [Member]us-gaap_StatementGeographicalAxisxbrldihttp://xbrl.org/2006/xbrldixom_AbuDhabiMemberus-gaap_StatementGeographicalAxisexplicitMemberOthernaNo definition available.No authoritative reference available.falsefalse2false0us-gaap_OpenTaxYearsByMajorTaxJurisdictionus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse002000 - 2010falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringIdentification, by major jurisdiction, of tax years that remain open to examination under enacted tax laws.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 48
-Paragraph 21
-Subparagraph e
falsefalse3false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosureincomesalesbasedandothertaxesremainingtaxyearssubjecttoexaminationbymajortaxjurisdictiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsetruefalse{us-gaap_StatementGeographicalAxis} : Angola [Member]
1/1/2010 - 12/31/2010
Duration_1_1_2010_To_12_31_201033742http://www.sec.gov/CIK0000034088duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseAngola [Member]us-gaap_StatementGeographicalAxisxbrldihttp://xbrl.org/2006/xbrldixom_AngolaMemberus-gaap_StatementGeographicalAxisexplicitMemberOthernaNo definition available.No authoritative reference available.falsefalse4false0us-gaap_OpenTaxYearsByMajorTaxJurisdictionus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse002007 - 2010falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringIdentification, by major jurisdiction, of tax years that remain open to examination under enacted tax laws.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 48
-Paragraph 21
-Subparagraph e
falsefalse5false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosureincomesalesbasedandothertaxesremainingtaxyearssubjecttoexaminationbymajortaxjurisdictiondetails1falsefalsefalse00falsefalsefalsefalsefalse3falsefalsetruefalse{us-gaap_StatementGeographicalAxis} : Australia [Member]
1/1/2010 - 12/31/2010
Duration_1_1_2010_To_12_31_2010337422http://www.sec.gov/CIK0000034088duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseAustralia [Member]us-gaap_StatementGeographicalAxisxbrldihttp://xbrl.org/2006/xbrldixom_AustraliaMemberus-gaap_StatementGeographicalAxisexplicitMemberOthernaNo definition available.No authoritative reference available.falsefalse6false0us-gaap_OpenTaxYearsByMajorTaxJurisdictionus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse002000 - 2010falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringIdentification, by major jurisdiction, of tax years that remain open to examination under enacted tax laws.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 48
-Paragraph 21
-Subparagraph e
falsefalse7false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosureincomesalesbasedandothertaxesremainingtaxyearssubjecttoexaminationbymajortaxjurisdictiondetails1falsefalsefalse00falsefalsefalsefalsefalse4falsefalsetruefalse{us-gaap_StatementGeographicalAxis} : Canada [Member]
1/1/2010 - 12/31/2010
Duration_1_1_2010_To_12_31_2010337423http://www.sec.gov/CIK0000034088duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseCanada [Member]us-gaap_StatementGeographicalAxisxbrldihttp://xbrl.org/2006/xbrldixom_CanadaMemberus-gaap_StatementGeographicalAxisexplicitMemberOthernaNo definition available.No authoritative reference available.falsefalse8false0us-gaap_OpenTaxYearsByMajorTaxJurisdictionus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse001994 - 2010falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringIdentification, by major jurisdiction, of tax years that remain open to examination under enacted tax laws.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 48
-Paragraph 21
-Subparagraph e
falsefalse9false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosureincomesalesbasedandothertaxesremainingtaxyearssubjecttoexaminationbymajortaxjurisdictiondetails1falsefalsefalse00falsefalsefalsefalsefalse5falsefalsetruefalse{us-gaap_StatementGeographicalAxis} : Equatorial Guinea [Member]
1/1/2010 - 12/31/2010
Duration_1_1_2010_To_12_31_201052http://www.sec.gov/CIK0000034088duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseEquatorial Guinea [Member]us-gaap_StatementGeographicalAxisxbrldihttp://xbrl.org/2006/xbrldixom_EquatorialGuineaMemberus-gaap_StatementGeographicalAxisexplicitMemberOthernaNo definition available.No authoritative reference available.falsefalse10false0us-gaap_OpenTaxYearsByMajorTaxJurisdictionus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse002005 - 2010falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringIdentification, by major jurisdiction, of tax years that remain open to examination under enacted tax laws.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 48
-Paragraph 21
-Subparagraph e
falsefalse11false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosureincomesalesbasedandothertaxesremainingtaxyearssubjecttoexaminationbymajortaxjurisdictiondetails1falsefalsefalse00falsefalsefalsefalsefalse6falsefalsetruefalse{us-gaap_StatementGeographicalAxis} : Germany [Member]
1/1/2010 - 12/31/2010
Duration_1_1_2010_To_12_31_201053http://www.sec.gov/CIK0000034088duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseGermany [Member]us-gaap_StatementGeographicalAxisxbrldihttp://xbrl.org/2006/xbrldixom_GermanyMemberus-gaap_StatementGeographicalAxisexplicitMemberOthernaNo definition available.No authoritative reference available.falsefalse12false0us-gaap_OpenTaxYearsByMajorTaxJurisdictionus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse001999 - 2010falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringIdentification, by major jurisdiction, of tax years that remain open to examination under enacted tax laws.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 48
-Paragraph 21
-Subparagraph e
falsefalse13false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosureincomesalesbasedandothertaxesremainingtaxyearssubjecttoexaminationbymajortaxjurisdictiondetails1falsefalsefalse00falsefalsefalsefalsefalse7falsefalsetruefalse{us-gaap_StatementGeographicalAxis} : Japan [Member]
1/1/2010 - 12/31/2010
Duration_1_1_2010_To_12_31_2010322222http://www.sec.gov/CIK0000034088duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseJapan [Member]us-gaap_StatementGeographicalAxisxbrldihttp://xbrl.org/2006/xbrldixom_JapanMemberus-gaap_StatementGeographicalAxisexplicitMemberOthernaNo definition available.No authoritative reference available.falsefalse14false0us-gaap_OpenTaxYearsByMajorTaxJurisdictionus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse002003 - 2010falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringIdentification, by major jurisdiction, of tax years that remain open to examination under enacted tax laws.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 48
-Paragraph 21
-Subparagraph e
falsefalse15false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosureincomesalesbasedandothertaxesremainingtaxyearssubjecttoexaminationbymajortaxjurisdictiondetails1falsefalsefalse00falsefalsefalsefalsefalse8falsefalsetruefalse{us-gaap_StatementGeographicalAxis} : Malaysia [Member]
1/1/2010 - 12/31/2010
Duration_1_1_2010_To_12_31_201022222http://www.sec.gov/CIK0000034088duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseMalaysia [Member]us-gaap_StatementGeographicalAxisxbrldihttp://xbrl.org/2006/xbrldixom_MalaysiaMemberus-gaap_StatementGeographicalAxisexplicitMemberOthernaNo definition available.No authoritative reference available.falsefalse16false0us-gaap_OpenTaxYearsByMajorTaxJurisdictionus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse002004 - 2010falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringIdentification, by major jurisdiction, of tax years that remain open to examination under enacted tax laws.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 48
-Paragraph 21
-Subparagraph e
falsefalse17false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosureincomesalesbasedandothertaxesremainingtaxyearssubjecttoexaminationbymajortaxjurisdictiondetails1falsefalsefalse00falsefalsefalsefalsefalse9falsefalsetruefalse{us-gaap_StatementGeographicalAxis} : Nigeria [Member]
1/1/2010 - 12/31/2010
Duration_1_1_2010_To_12_31_2010222222http://www.sec.gov/CIK0000034088duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseNigeria [Member]us-gaap_StatementGeographicalAxisxbrldihttp://xbrl.org/2006/xbrldixom_NigeriaMemberus-gaap_StatementGeographicalAxisexplicitMemberOthernaNo definition available.No authoritative reference available.falsefalse18false0us-gaap_OpenTaxYearsByMajorTaxJurisdictionus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse001998 - 2010falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringIdentification, by major jurisdiction, of tax years that remain open to examination under enacted tax laws.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 48
-Paragraph 21
-Subparagraph e
falsefalse19false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosureincomesalesbasedandothertaxesremainingtaxyearssubjecttoexaminationbymajortaxjurisdictiondetails1falsefalsefalse00falsefalsefalsefalsefalse10falsefalsetruefalse{us-gaap_StatementGeographicalAxis} : Norway [Member]
1/1/2010 - 12/31/2010
Duration_1_1_2010_To_12_31_2010222223http://www.sec.gov/CIK0000034088duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseNorway [Member]us-gaap_StatementGeographicalAxisxbrldihttp://xbrl.org/2006/xbrldixom_NorwayMemberus-gaap_StatementGeographicalAxisexplicitMemberOthernaNo definition available.No authoritative reference available.falsefalse20false0us-gaap_OpenTaxYearsByMajorTaxJurisdictionus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse002000 - 2010falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringIdentification, by major jurisdiction, of tax years that remain open to examination under enacted tax laws.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 48
-Paragraph 21
-Subparagraph e
falsefalse21false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosureincomesalesbasedandothertaxesremainingtaxyearssubjecttoexaminationbymajortaxjurisdictiondetails1falsefalsefalse00falsefalsefalsefalsefalse11falsefalsetruefalse{us-gaap_StatementGeographicalAxis} : United Kingdom [Member]
1/1/2010 - 12/31/2010
Duration_1_1_2010_To_12_31_201022223http://www.sec.gov/CIK0000034088duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseUnited Kingdom [Member]us-gaap_StatementGeographicalAxisxbrldihttp://xbrl.org/2006/xbrldixom_UnitedKingdomMemberus-gaap_StatementGeographicalAxisexplicitMemberOthernaNo definition available.No authoritative reference available.falsefalse22false0us-gaap_OpenTaxYearsByMajorTaxJurisdictionus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse002004 - 2010falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringIdentification, by major jurisdiction, of tax years that remain open to examination under enacted tax laws.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 48
-Paragraph 21
-Subparagraph e
falsefalse23false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosureincomesalesbasedandothertaxesremainingtaxyearssubjecttoexaminationbymajortaxjurisdictiondetails1falsefalsefalse00falsefalsefalsefalsefalse12falsefalsetruefalse{us-gaap_StatementGeographicalAxis} : United States [Member]
1/1/2010 - 12/31/2010
Duration_1_1_2010_To_12_31_20102222222http://www.sec.gov/CIK0000034088duration2010-01-01T00:00:002010-12-31T00:00:00falsefalseUnited States [Member]us-gaap_StatementGeographicalAxisxbrldihttp://xbrl.org/2006/xbrldixom_UnitedStatesMemberus-gaap_StatementGeographicalAxisexplicitMemberOthernaNo definition available.No authoritative reference available.falsefalse24false0us-gaap_OpenTaxYearsByMajorTaxJurisdictionus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse001991 - 1996falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringIdentification, by major jurisdiction, of tax years that remain open to examination under enacted tax laws.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 48
-Paragraph 21
-Subparagraph e
falsefalse25false0xom_SecondOpenTaxYearsByMajorTaxJurisdictionxomfalsenadurationSecond Open Tax Years By Major Tax Jurisdictionfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse001998 - 2000falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringSecond Open Tax Years By Major Tax JurisdictionNo authoritative reference available.falsefalse26false0xom_ThirdOpenTaxYearsByMajorTaxJurisdictionxomfalsenadurationThird open tax years by major tax jurisdictionfalsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse002004 - 2010falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringThird open tax years by major tax jurisdictionNo authoritative reference available.falsefalse126Income, Sales-Based and Other Taxes (Remaining Tax Years Subject to Examination by Major Tax Jurisdiction) (Details)UnKnownUnKnownUnKnownUnKnownfalsetrue
