2.2.0.25truefalse41608 - Disclosure - Pension and Other Postretirement Benefits (Fair Value of Benefit Plan Assets- U.S. Pension) (Details)truefalseIn Millionsfalse1falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - U.S. [Member]
12/31/2010
USD ($)
$As_Of_12_31_201083http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170Unit14Standardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$2falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - U.S. [Member]
12/31/2009
USD ($)
$As_Of_12_31_200922http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170Unit14Standardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$3falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - U.S. [Member]
12/31/2008
USD ($)
$As_Of_12_31_20088http://www.sec.gov/CIK0000034088instant2008-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosurepensionandotherpostretirementbenefitsfairvalueofbenefitplanassetsuspensiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse1falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - U.S. [Member]
12/31/2010
USD ($)
$As_Of_12_31_201083http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170Unit14Standardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$2falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - U.S. [Member]
12/31/2009
USD ($)
$As_Of_12_31_200922http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170Unit14Standardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$3falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - U.S. [Member]
12/31/2008
USD ($)
$As_Of_12_31_20088http://www.sec.gov/CIK0000034088instant2008-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse2false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse1083500000010835falsetruefalsefalsefalse2truefalsefalse1027700000010277falsetruefalsefalsefalse3truefalsefalse66340000006634falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49
falsefalse3false0xom_DefinedBenefitPlanInsuranceContractsAtContractValuexomfalsedebitinstantInsurance contracts at contract value.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse2300000023falsefalsefalsefalsefalse2truefalsefalse2400000024falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryInsurance contracts at contract value.No authoritative reference available.falsefalse4false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosurepensionandotherpostretirementbenefitsfairvalueofbenefitplanassetsuspensiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Cash [Member]
12/31/2010
USD ($)
$As_Of_12_31_20103133327http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseQuoted Prices in Active Markets for Identical Assets (Level 1) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel1Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalseCash [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CashMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$5falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Cash [Member]
12/31/2009
USD ($)
$As_Of_12_31_200961http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseQuoted Prices in Active Markets for Identical Assets (Level 1) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel1Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalseCash [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CashMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse5false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse6800000068falsefalsefalsefalsefalse2truefalsefalse140000000140falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49
falsefalse6false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosurepensionandotherpostretirementbenefitsfairvalueofbenefitplanassetsuspensiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse6falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Total at Fair Value [Member]
12/31/2010
USD ($)
$As_Of_12_31_20108515http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseQuoted Prices in Active Markets for Identical Assets (Level 1) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel1Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalseTotal at Fair Value [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_TotalAtFairValueMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$7falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Total at Fair Value [Member]
12/31/2009
USD ($)
$As_Of_12_31_200983http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseQuoted Prices in Active Markets for Identical Assets (Level 1) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel1Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalseTotal at Fair Value [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_TotalAtFairValueMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse7false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse6800000068falsefalsefalsefalsefalse2truefalsefalse140000000140falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49
falsefalse8false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosurepensionandotherpostretirementbenefitsfairvalueofbenefitplanassetsuspensiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse8falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Significant Other Observable Inputs (Level 2) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : U.S. Equity Securities [Member]
12/31/2010
USD ($)
$As_Of_12_31_2010831http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseSignificant Other Observable Inputs (Level 2) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel2Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalseU.S. Equity Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_USEquitySecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$9falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Significant Other Observable Inputs (Level 2) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : U.S. Equity Securities [Member]
12/31/2009
USD ($)
$As_Of_12_31_200990http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseSignificant Other Observable Inputs (Level 2) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel2Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalseU.S. Equity Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_USEquitySecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse9false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse26480000002648[1]falsefalsefalsefalsefalse2truefalsefalse25030000002503[1]falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49
falsefalse10false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosurepensionandotherpostretirementbenefitsfairvalueofbenefitplanassetsuspensiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse10falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Significant Other Observable Inputs (Level 2) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Non-U.S. Equity Securities [Member]
12/31/2010
USD ($)
$As_Of_12_31_2010822http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseSignificant Other Observable Inputs (Level 2) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel2Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalseNon-U.S. Equity Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_NonUsEquitySecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$11falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Significant Other Observable Inputs (Level 2) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Non-U.S. Equity Securities [Member]
12/31/2009
USD ($)
$As_Of_12_31_200978http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseSignificant Other Observable Inputs (Level 2) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel2Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalseNon-U.S. Equity Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_NonUsEquitySecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse11false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse35300000003530[1]falsefalsefalsefalsefalse2truefalsefalse33410000003341[1]falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49
falsefalse12false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosurepensionandotherpostretirementbenefitsfairvalueofbenefitplanassetsuspensiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse12falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Significant Other Observable Inputs (Level 2) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Corporate Debt Securities [Member]
12/31/2010
USD ($)
$As_Of_12_31_2010813http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseSignificant Other Observable Inputs (Level 2) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel2Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalseCorporate Debt Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CorporateDebtSecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$13falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Significant Other Observable Inputs (Level 2) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Corporate Debt Securities [Member]
12/31/2009
USD ($)
$As_Of_12_31_200966http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseSignificant Other Observable Inputs (Level 2) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel2Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalseCorporate Debt Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CorporateDebtSecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse13false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse11520000001152[2]falsefalsefalsefalsefalse2truefalsefalse10400000001040[2]falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49
falsefalse14false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosurepensionandotherpostretirementbenefitsfairvalueofbenefitplanassetsuspensiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse14falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Significant Other Observable Inputs (Level 2) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Government Debt Securities [Member]
12/31/2010
USD ($)
$As_Of_12_31_2010819http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseSignificant Other Observable Inputs (Level 2) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel2Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalseGovernment Debt Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_GovernmentDebtSecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$15falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Significant Other Observable Inputs (Level 2) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Government Debt Securities [Member]
12/31/2009
USD ($)
$As_Of_12_31_200974http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseSignificant Other Observable Inputs (Level 2) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel2Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalseGovernment Debt Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_GovernmentDebtSecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse15false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse28470000002847[2]falsefalsefalsefalsefalse2truefalsefalse25700000002570[2]falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49
falsefalse16false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosurepensionandotherpostretirementbenefitsfairvalueofbenefitplanassetsuspensiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse16falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Significant Other Observable Inputs (Level 2) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Asset-backed Debt Securities [Member]
12/31/2010
USD ($)
$As_Of_12_31_20103133325http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseSignificant Other Observable Inputs (Level 2) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel2Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalseAsset-backed Debt Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_AssetBackedSecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$17falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Significant Other Observable Inputs (Level 2) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Asset-backed Debt Securities [Member]
12/31/2009
USD ($)
$As_Of_12_31_200958http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseSignificant Other Observable Inputs (Level 2) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel2Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalseAsset-backed Debt Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_AssetBackedSecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse17false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse3100000031[2]falsefalsefalsefalsefalse2truefalsefalse3000000030[2]falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49
falsefalse18false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosurepensionandotherpostretirementbenefitsfairvalueofbenefitplanassetsuspensiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse18falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Significant Other Observable Inputs (Level 2) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Total at Fair Value [Member]
12/31/2010
USD ($)
$As_Of_12_31_2010827http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseSignificant Other Observable Inputs (Level 2) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel2Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalseTotal at Fair Value [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_TotalAtFairValueMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$19falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Significant Other Observable Inputs (Level 2) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Total at Fair Value [Member]
12/31/2009
USD ($)
$As_Of_12_31_200985http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseSignificant Other Observable Inputs (Level 2) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel2Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalseTotal at Fair Value [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_TotalAtFairValueMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse19false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse1020800000010208falsefalsefalsefalsefalse2truefalsefalse94840000009484falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49
falsefalse20false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosurepensionandotherpostretirementbenefitsfairvalueofbenefitplanassetsuspensiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse20falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Significant Unobservable Inputs (Level 3) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Private Equity [Member]
12/31/2010
USD ($)
$As_Of_12_31_2010815http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseSignificant Unobservable Inputs (Level 3) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel3Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalsePrivate Equity [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_PrivateEquityFundsMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$21falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Significant Unobservable Inputs (Level 3) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Private Equity [Member]
12/31/2009
USD ($)
$As_Of_12_31_200969http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseSignificant Unobservable Inputs (Level 3) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel3Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalsePrivate Equity [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_PrivateEquityFundsMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse21false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse408000000408[3]falsefalsefalsefalsefalse2truefalsefalse349000000349[3]falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49
falsefalse22false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosurepensionandotherpostretirementbenefitsfairvalueofbenefitplanassetsuspensiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse22falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Significant Unobservable Inputs (Level 3) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Private Mortgage Debt Securities [Member]
12/31/2010
USD ($)
$As_Of_12_31_2010824http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseSignificant Unobservable Inputs (Level 3) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel3Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalsePrivate Mortgage Debt Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_PrivateMortgageDebtSecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$23falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Significant Unobservable Inputs (Level 3) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Private Mortgage Debt Securities [Member]
12/31/2009
USD ($)
$As_Of_12_31_200981http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseSignificant Unobservable Inputs (Level 3) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel3Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalsePrivate Mortgage Debt Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_PrivateMortgageDebtSecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse23false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse128000000128[4]falsefalsefalsefalsefalse2truefalsefalse280000000280[4]falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49
falsefalse24false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosurepensionandotherpostretirementbenefitsfairvalueofbenefitplanassetsuspensiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse24falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Significant Unobservable Inputs (Level 3) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Total at Fair Value [Member]
12/31/2010
USD ($)
$As_Of_12_31_20108516http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseSignificant Unobservable Inputs (Level 3) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel3Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalseTotal at Fair Value [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_TotalAtFairValueMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$25falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Significant Unobservable Inputs (Level 3) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Total at Fair Value [Member]
12/31/2009
USD ($)
$As_Of_12_31_200987http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseSignificant Unobservable Inputs (Level 3) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel3Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalseTotal at Fair Value [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_TotalAtFairValueMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse25false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse536000000536falsefalsefalsefalsefalse2truefalsefalse629000000629falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49
falsefalse26false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosurepensionandotherpostretirementbenefitsfairvalueofbenefitplanassetsuspensiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse26falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - U.S. [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : U.S. Equity Securities [Member]
12/31/2010
USD ($)
$As_Of_12_31_2010857http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseU.S. Equity Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_USEquitySecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$27falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - U.S. [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : U.S. Equity Securities [Member]
12/31/2009
USD ($)
$As_Of_12_31_200955http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseU.S. Equity Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_USEquitySecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse27false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse26480000002648falsefalsefalsefalsefalse2truefalsefalse25030000002503falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49
falsefalse28false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosurepensionandotherpostretirementbenefitsfairvalueofbenefitplanassetsuspensiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse28falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - U.S. [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Non-U.S. Equity Securities [Member]
12/31/2010
USD ($)
$As_Of_12_31_20103133317http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseNon-U.S. Equity Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_NonUsEquitySecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$29falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - U.S. [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Non-U.S. Equity Securities [Member]
12/31/2009
USD ($)
$As_Of_12_31_200945http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseNon-U.S. Equity Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_NonUsEquitySecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse29false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse35300000003530falsefalsefalsefalsefalse2truefalsefalse33410000003341falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49
falsefalse30false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosurepensionandotherpostretirementbenefitsfairvalueofbenefitplanassetsuspensiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse30falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - U.S. [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Private Equity [Member]
12/31/2010
USD ($)
$As_Of_12_31_20103133310http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalsePrivate Equity [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_PrivateEquityFundsMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$31falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - U.S. [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Private Equity [Member]
12/31/2009
USD ($)
$As_Of_12_31_200938http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalsePrivate Equity [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_PrivateEquityFundsMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse31false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse408000000408falsefalsefalsefalsefalse2truefalsefalse349000000349falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49
falsefalse32false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosurepensionandotherpostretirementbenefitsfairvalueofbenefitplanassetsuspensiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse32falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - U.S. [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Corporate Debt Securities [Member]
12/31/2010
USD ($)
$As_Of_12_31_201088http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseCorporate Debt Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CorporateDebtSecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$33falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - U.S. [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Corporate Debt Securities [Member]
12/31/2009
USD ($)
$As_Of_12_31_200932http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseCorporate Debt Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CorporateDebtSecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse33false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse11520000001152falsefalsefalsefalsefalse2truefalsefalse10400000001040falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49
falsefalse34false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosurepensionandotherpostretirementbenefitsfairvalueofbenefitplanassetsuspensiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse34falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - U.S. [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Government Debt Securities [Member]
12/31/2010
USD ($)
$As_Of_12_31_20103133314http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseGovernment Debt Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_GovernmentDebtSecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$35falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - U.S. [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Government Debt Securities [Member]
12/31/2009
USD ($)
$As_Of_12_31_200942http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseGovernment Debt Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_GovernmentDebtSecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse35false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse28470000002847falsefalsefalsefalsefalse2truefalsefalse25700000002570falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49
falsefalse36false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosurepensionandotherpostretirementbenefitsfairvalueofbenefitplanassetsuspensiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse36falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - U.S. [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Asset-backed Debt Securities [Member]
12/31/2010
USD ($)
$As_Of_12_31_2010854http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseAsset-backed Debt Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_AssetBackedSecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$37falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - U.S. [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Asset-backed Debt Securities [Member]
12/31/2009
USD ($)
$As_Of_12_31_200926http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseAsset-backed Debt Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_AssetBackedSecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse37false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse3100000031falsefalsefalsefalsefalse2truefalsefalse3000000030falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49
falsefalse38false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosurepensionandotherpostretirementbenefitsfairvalueofbenefitplanassetsuspensiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse38falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - U.S. [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Private Mortgage Debt Securities [Member]
12/31/2010
USD ($)
$As_Of_12_31_20103133319http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalsePrivate Mortgage Debt Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_PrivateMortgageDebtSecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$39falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - U.S. [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Private Mortgage Debt Securities [Member]
12/31/2009
USD ($)
$As_Of_12_31_200948http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalsePrivate Mortgage Debt Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_PrivateMortgageDebtSecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse39false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse128000000128falsefalsefalsefalsefalse2truefalsefalse280000000280falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49
falsefalse40false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosurepensionandotherpostretirementbenefitsfairvalueofbenefitplanassetsuspensiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse40falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - U.S. [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Cash [Member]
12/31/2010
USD ($)
$As_Of_12_31_201087http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseCash [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CashMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$41falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - U.S. [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Cash [Member]
12/31/2009
USD ($)
$As_Of_12_31_200929http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseCash [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CashMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse41false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse6800000068falsefalsefalsefalsefalse2truefalsefalse140000000140falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49
falsefalse42false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosurepensionandotherpostretirementbenefitsfairvalueofbenefitplanassetsuspensiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse42falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - U.S. [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Total at Fair Value [Member]
12/31/2010
USD ($)
$As_Of_12_31_2010811http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseTotal at Fair Value [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_TotalAtFairValueMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$43falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - U.S. [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Total at Fair Value [Member]
12/31/2009
USD ($)
$As_Of_12_31_200950http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseTotal at Fair Value [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_TotalAtFairValueMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse43false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse1081200000010812falsefalsefalsefalsefalse2truefalsefalse1025300000010253falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49
falsefalse44false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosurepensionandotherpostretirementbenefitsfairvalueofbenefitplanassetsuspensiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse44falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - U.S. [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Total Plan Assets [Member]
12/31/2010
USD ($)
$As_Of_12_31_20103133321http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseTotal Plan Assets [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_TotalPlanAssetsMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$45falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - U.S. [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Total Plan Assets [Member]
12/31/2009
USD ($)
$As_Of_12_31_200952http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseTotal Plan Assets [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_TotalPlanAssetsMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse45false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse1083500000010835falsefalsefalsefalsefalse2truefalsefalse1027700000010277falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49
falsefalse46false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosurepensionandotherpostretirementbenefitsfairvalueofbenefitplanassetsuspensiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse46falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
12/31/2010
USD ($)
$As_Of_12_31_201082http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170Unit14Standardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$47falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
12/31/2009
USD ($)
$As_Of_12_31_200921http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170Unit14Standardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$48falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
12/31/2008
USD ($)
$As_Of_12_31_20086http://www.sec.gov/CIK0000034088instant2008-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse47false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse1676500000016765falsefalsefalsefalsefalse2truefalsefalse1540100000015401falsefalsefalsefalsefalse3truefalsefalse1126000000011260falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49
falsefalse48false0xom_DefinedBenefitPlanInsuranceContractsAtContractValuexomfalsedebitinstantInsurance contracts at contract value.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse158000000158falsefalsefalsefalsefalse2truefalsefalse148000000148falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryInsurance contracts at contract value.No authoritative reference available.falsefalse49false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosurepensionandotherpostretirementbenefitsfairvalueofbenefitplanassetsuspensiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse49falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Non-U.S. Equity Securities [Member]
12/31/2010
USD ($)
$As_Of_12_31_20108513http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseQuoted Prices in Active Markets for Identical Assets (Level 1) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel1Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalseNon-U.S. Equity Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_NonUsEquitySecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$50falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Non-U.S. Equity Securities [Member]
12/31/2009
USD ($)
$As_Of_12_31_200975http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseQuoted Prices in Active Markets for Identical Assets (Level 1) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel1Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalseNon-U.S. Equity Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_NonUsEquitySecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse50false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse228000000228[5]falsefalsefalsefalsefalse2truefalsefalse227000000227[5]falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49
falsefalse51false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosurepensionandotherpostretirementbenefitsfairvalueofbenefitplanassetsuspensiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse51falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Corporate Debt Securities [Member]
12/31/2010
USD ($)
$As_Of_12_31_20108510http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseQuoted Prices in Active Markets for Identical Assets (Level 1) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel1Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalseCorporate Debt Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CorporateDebtSecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$52falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Corporate Debt Securities [Member]
12/31/2009
USD ($)
$As_Of_12_31_200963http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseQuoted Prices in Active Markets for Identical Assets (Level 1) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel1Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalseCorporate Debt Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CorporateDebtSecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse52false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse20000002[6]falsefalsefalsefalsefalse2truefalsefalse20000002[6]falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49
falsefalse53false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosurepensionandotherpostretirementbenefitsfairvalueofbenefitplanassetsuspensiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse53falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Government Debt Securities [Member]
12/31/2010
USD ($)
$As_Of_12_31_20108512http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseQuoted Prices in Active Markets for Identical Assets (Level 1) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel1Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalseGovernment Debt Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_GovernmentDebtSecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$54falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Government Debt Securities [Member]
12/31/2009
USD ($)
$As_Of_12_31_200971http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseQuoted Prices in Active Markets for Identical Assets (Level 1) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel1Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalseGovernment Debt Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_GovernmentDebtSecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse54false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse146000000146[6]falsefalsefalsefalsefalse2truefalsefalse7000000070[6]falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49
falsefalse55false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosurepensionandotherpostretirementbenefitsfairvalueofbenefitplanassetsuspensiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse55falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Cash [Member]
12/31/2010
USD ($)
$As_Of_12_31_2010859http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseQuoted Prices in Active Markets for Identical Assets (Level 1) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel1Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalseCash [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CashMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$56falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Cash [Member]
12/31/2009
USD ($)
$As_Of_12_31_200959http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseQuoted Prices in Active Markets for Identical Assets (Level 1) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel1Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalseCash [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CashMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse56false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse6300000063falsefalsefalsefalsefalse2truefalsefalse7900000079falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49
falsefalse57false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosurepensionandotherpostretirementbenefitsfairvalueofbenefitplanassetsuspensiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse57falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Total at Fair Value [Member]
12/31/2010
USD ($)
$As_Of_12_31_2010825http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseQuoted Prices in Active Markets for Identical Assets (Level 1) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel1Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalseTotal at Fair Value [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_TotalAtFairValueMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$58falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Total at Fair Value [Member]
12/31/2009
USD ($)
$As_Of_12_31_200982http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseQuoted Prices in Active Markets for Identical Assets (Level 1) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel1Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalseTotal at Fair Value [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_TotalAtFairValueMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse58false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse439000000439falsefalsefalsefalsefalse2truefalsefalse378000000378falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49
falsefalse59false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosurepensionandotherpostretirementbenefitsfairvalueofbenefitplanassetsuspensiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse59falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Significant Other Observable Inputs (Level 2) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : U.S. Equity Securities [Member]
12/31/2010
USD ($)
$As_Of_12_31_2010829http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseSignificant Other Observable Inputs (Level 2) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel2Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalseU.S. Equity Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_USEquitySecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$60falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Significant Other Observable Inputs (Level 2) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : U.S. Equity Securities [Member]
12/31/2009
USD ($)
$As_Of_12_31_200988http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseSignificant Other Observable Inputs (Level 2) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel2Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalseU.S. Equity Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_USEquitySecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse60false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse24430000002443[1]falsefalsefalsefalsefalse2truefalsefalse22440000002244[1]falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49
falsefalse61false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosurepensionandotherpostretirementbenefitsfairvalueofbenefitplanassetsuspensiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse61falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Significant Other Observable Inputs (Level 2) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Non-U.S. Equity Securities [Member]
12/31/2010
USD ($)
$As_Of_12_31_2010820http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseSignificant Other Observable Inputs (Level 2) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel2Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalseNon-U.S. Equity Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_NonUsEquitySecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$62falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Significant Other Observable Inputs (Level 2) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Non-U.S. Equity Securities [Member]
12/31/2009
USD ($)
$As_Of_12_31_200976http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseSignificant Other Observable Inputs (Level 2) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel2Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalseNon-U.S. Equity Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_NonUsEquitySecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse62false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse65020000006502[1]falsefalsefalsefalsefalse2truefalsefalse59460000005946[1]falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49
falsefalse63false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosurepensionandotherpostretirementbenefitsfairvalueofbenefitplanassetsuspensiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse63falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Significant Other Observable Inputs (Level 2) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Corporate Debt Securities [Member]
12/31/2010
USD ($)
$As_Of_12_31_20103133329http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseSignificant Other Observable Inputs (Level 2) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel2Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalseCorporate Debt Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CorporateDebtSecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$64falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Significant Other Observable Inputs (Level 2) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Corporate Debt Securities [Member]
12/31/2009
USD ($)
$As_Of_12_31_200964http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseSignificant Other Observable Inputs (Level 2) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel2Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalseCorporate Debt Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CorporateDebtSecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse64false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse16290000001629[2]falsefalsefalsefalsefalse2truefalsefalse16370000001637[2]falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49
falsefalse65false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosurepensionandotherpostretirementbenefitsfairvalueofbenefitplanassetsuspensiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse65falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Significant Other Observable Inputs (Level 2) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Government Debt Securities [Member]
12/31/2010
USD ($)
$As_Of_12_31_2010817http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseSignificant Other Observable Inputs (Level 2) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel2Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalseGovernment Debt Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_GovernmentDebtSecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$66falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Significant Other Observable Inputs (Level 2) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Government Debt Securities [Member]
12/31/2009
USD ($)
$As_Of_12_31_200972http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseSignificant Other Observable Inputs (Level 2) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel2Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalseGovernment Debt Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_GovernmentDebtSecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse66false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse47090000004709[2]falsefalsefalsefalsefalse2truefalsefalse42170000004217[2]falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49
falsefalse67false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosurepensionandotherpostretirementbenefitsfairvalueofbenefitplanassetsuspensiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse67falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Significant Other Observable Inputs (Level 2) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Asset-backed Debt Securities [Member]
12/31/2010
USD ($)
$As_Of_12_31_20103133324http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseSignificant Other Observable Inputs (Level 2) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel2Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalseAsset-backed Debt Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_AssetBackedSecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$68falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Significant Other Observable Inputs (Level 2) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Asset-backed Debt Securities [Member]
12/31/2009
USD ($)
$As_Of_12_31_200956http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseSignificant Other Observable Inputs (Level 2) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel2Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalseAsset-backed Debt Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_AssetBackedSecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse68false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse9800000098[2]falsefalsefalsefalsefalse2truefalsefalse119000000119[2]falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49
falsefalse69false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosurepensionandotherpostretirementbenefitsfairvalueofbenefitplanassetsuspensiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse69falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Significant Other Observable Inputs (Level 2) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Cash [Member]
12/31/2010
USD ($)
$As_Of_12_31_20103133328http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseSignificant Other Observable Inputs (Level 2) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel2Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalseCash [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CashMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$70falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Significant Other Observable Inputs (Level 2) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Cash [Member]
12/31/2009
USD ($)
$As_Of_12_31_200962http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseSignificant Other Observable Inputs (Level 2) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel2Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalseCash [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CashMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse70false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse5100000051[7]falsefalsefalsefalsefalse2truefalsefalse5500000055[7]falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49
falsefalse71false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosurepensionandotherpostretirementbenefitsfairvalueofbenefitplanassetsuspensiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse71falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Significant Other Observable Inputs (Level 2) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Total at Fair Value [Member]
12/31/2010
USD ($)
$As_Of_12_31_2010826http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseSignificant Other Observable Inputs (Level 2) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel2Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalseTotal at Fair Value [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_TotalAtFairValueMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$72falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Significant Other Observable Inputs (Level 2) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Total at Fair Value [Member]
12/31/2009
USD ($)
$As_Of_12_31_200984http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseSignificant Other Observable Inputs (Level 2) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel2Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalseTotal at Fair Value [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_TotalAtFairValueMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse72false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse1543200000015432falsefalsefalsefalsefalse2truefalsefalse1421800000014218falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49
falsefalse73false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosurepensionandotherpostretirementbenefitsfairvalueofbenefitplanassetsuspensiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse73falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Significant Unobservable Inputs (Level 3) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Private Equity [Member]
12/31/2010
USD ($)
$As_Of_12_31_20108511http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseSignificant Unobservable Inputs (Level 3) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel3Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalsePrivate Equity [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_PrivateEquityFundsMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$74falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Significant Unobservable Inputs (Level 3) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Private Equity [Member]
12/31/2009
USD ($)
$As_Of_12_31_200967http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseSignificant Unobservable Inputs (Level 3) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel3Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalsePrivate Equity [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_PrivateEquityFundsMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse74false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse315000000315[3]falsefalsefalsefalsefalse2truefalsefalse239000000239[3]falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49
falsefalse75false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosurepensionandotherpostretirementbenefitsfairvalueofbenefitplanassetsuspensiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse75falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Significant Unobservable Inputs (Level 3) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Private Mortgage Debt Securities [Member]
12/31/2010
USD ($)
$As_Of_12_31_20108514http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseSignificant Unobservable Inputs (Level 3) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel3Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalsePrivate Mortgage Debt Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_PrivateMortgageDebtSecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$76falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Significant Unobservable Inputs (Level 3) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Private Mortgage Debt Securities [Member]
12/31/2009
USD ($)
$As_Of_12_31_200979http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseSignificant Unobservable Inputs (Level 3) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel3Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalsePrivate Mortgage Debt Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_PrivateMortgageDebtSecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse76false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse40000004[4]falsefalsefalsefalsefalse2truefalsefalse50000005[4]falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49
falsefalse77false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosurepensionandotherpostretirementbenefitsfairvalueofbenefitplanassetsuspensiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse77falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Significant Unobservable Inputs (Level 3) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Real Estate Funds [Member]
12/31/2010
USD ($)
$As_Of_12_31_2010816http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseSignificant Unobservable Inputs (Level 3) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel3Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalseReal Estate Funds [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_RealEstateMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$78falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Significant Unobservable Inputs (Level 3) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Real Estate Funds [Member]
12/31/2009
USD ($)
$As_Of_12_31_200970http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseSignificant Unobservable Inputs (Level 3) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel3Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalseReal Estate Funds [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_RealEstateMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse78false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse417000000417[8]falsefalsefalsefalsefalse2truefalsefalse413000000413[8]falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49
falsefalse79false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosurepensionandotherpostretirementbenefitsfairvalueofbenefitplanassetsuspensiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse79falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Significant Unobservable Inputs (Level 3) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Total at Fair Value [Member]
12/31/2010
USD ($)
$As_Of_12_31_2010828http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseSignificant Unobservable Inputs (Level 3) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel3Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalseTotal at Fair Value [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_TotalAtFairValueMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$80falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxis} : Significant Unobservable Inputs (Level 3) [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Total at Fair Value [Member]
12/31/2009
USD ($)
$As_Of_12_31_200986http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseSignificant Unobservable Inputs (Level 3) [Member]us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel3Memberus-gaap_DefinedBenefitPlanFairValueOfPlanAssetsByMeasurementAxisexplicitMemberfalsefalseTotal at Fair Value [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_TotalAtFairValueMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse80false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse736000000736falsefalsefalsefalsefalse2truefalsefalse657000000657falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49
falsefalse81false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosurepensionandotherpostretirementbenefitsfairvalueofbenefitplanassetsuspensiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse81falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : U.S. Equity Securities [Member]
12/31/2010
USD ($)
$As_Of_12_31_20103133322http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseU.S. Equity Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_USEquitySecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$82falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : U.S. Equity Securities [Member]
12/31/2009
USD ($)
$As_Of_12_31_200953http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseU.S. Equity Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_USEquitySecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse82false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse24430000002443falsefalsefalsefalsefalse2truefalsefalse22440000002244falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49
falsefalse83false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosurepensionandotherpostretirementbenefitsfairvalueofbenefitplanassetsuspensiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse83falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Non-U.S. Equity Securities [Member]
12/31/2010
USD ($)
$As_Of_12_31_20103133315http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseNon-U.S. Equity Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_NonUsEquitySecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$84falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Non-U.S. Equity Securities [Member]
12/31/2009
USD ($)
$As_Of_12_31_200943http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseNon-U.S. Equity Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_NonUsEquitySecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse84false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse67300000006730falsefalsefalsefalsefalse2truefalsefalse61730000006173falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49
falsefalse85false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosurepensionandotherpostretirementbenefitsfairvalueofbenefitplanassetsuspensiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse85falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Private Equity [Member]
12/31/2010
USD ($)
$As_Of_12_31_2010313338http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalsePrivate Equity [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_PrivateEquityFundsMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$86falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Private Equity [Member]
12/31/2009
USD ($)
$As_Of_12_31_200936http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalsePrivate Equity [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_PrivateEquityFundsMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse86false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse315000000315falsefalsefalsefalsefalse2truefalsefalse239000000239falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49
falsefalse87false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosurepensionandotherpostretirementbenefitsfairvalueofbenefitplanassetsuspensiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse87falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Corporate Debt Securities [Member]
12/31/2010
USD ($)
$As_Of_12_31_2010313334http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseCorporate Debt Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CorporateDebtSecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$88falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Corporate Debt Securities [Member]
12/31/2009
USD ($)
$As_Of_12_31_200930http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseCorporate Debt Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CorporateDebtSecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse88false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse16310000001631falsefalsefalsefalsefalse2truefalsefalse16390000001639falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49
falsefalse89false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosurepensionandotherpostretirementbenefitsfairvalueofbenefitplanassetsuspensiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse89falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Government Debt Securities [Member]
12/31/2010
USD ($)
$As_Of_12_31_20103133312http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseGovernment Debt Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_GovernmentDebtSecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$90falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Government Debt Securities [Member]
12/31/2009
USD ($)
$As_Of_12_31_200940http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseGovernment Debt Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_GovernmentDebtSecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse90false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse48550000004855falsefalsefalsefalsefalse2truefalsefalse42870000004287falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49
falsefalse91false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosurepensionandotherpostretirementbenefitsfairvalueofbenefitplanassetsuspensiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse91falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Asset-backed Debt Securities [Member]
12/31/2010
USD ($)
$As_Of_12_31_2010852http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseAsset-backed Debt Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_AssetBackedSecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$92falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Asset-backed Debt Securities [Member]
12/31/2009
USD ($)
$As_Of_12_31_200924http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseAsset-backed Debt Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_AssetBackedSecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse92false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse9800000098falsefalsefalsefalsefalse2truefalsefalse119000000119falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49
falsefalse93false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosurepensionandotherpostretirementbenefitsfairvalueofbenefitplanassetsuspensiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse93falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Private Mortgage Debt Securities [Member]
12/31/2010
USD ($)
$As_Of_12_31_20103133318http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalsePrivate Mortgage Debt Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_PrivateMortgageDebtSecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$94falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Private Mortgage Debt Securities [Member]
12/31/2009
USD ($)
$As_Of_12_31_200946http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalsePrivate Mortgage Debt Securities [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_PrivateMortgageDebtSecuritiesMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse94false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse40000004falsefalsefalsefalsefalse2truefalsefalse50000005falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49
falsefalse95false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosurepensionandotherpostretirementbenefitsfairvalueofbenefitplanassetsuspensiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse95falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Real Estate Funds [Member]
12/31/2010
USD ($)
$As_Of_12_31_20103133311http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseReal Estate Funds [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_RealEstateMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$96falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Real Estate Funds [Member]
12/31/2009
USD ($)
$As_Of_12_31_200939http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseReal Estate Funds [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_RealEstateMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse96false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse417000000417falsefalsefalsefalsefalse2truefalsefalse413000000413falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49
falsefalse97false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosurepensionandotherpostretirementbenefitsfairvalueofbenefitplanassetsuspensiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse97falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Cash [Member]
12/31/2010
USD ($)
$As_Of_12_31_2010855http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseCash [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CashMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$98falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Cash [Member]
12/31/2009
USD ($)
$As_Of_12_31_200927http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseCash [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CashMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse98false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse114000000114falsefalsefalsefalsefalse2truefalsefalse134000000134falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49
falsefalse99false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosurepensionandotherpostretirementbenefitsfairvalueofbenefitplanassetsuspensiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse99falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Total at Fair Value [Member]
12/31/2010
USD ($)
$As_Of_12_31_2010810http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseTotal at Fair Value [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_TotalAtFairValueMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$100falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Total at Fair Value [Member]
12/31/2009
USD ($)
$As_Of_12_31_200949http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseTotal at Fair Value [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_TotalAtFairValueMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse100false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse1660700000016607falsefalsefalsefalsefalse2truefalsefalse1525300000015253falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49
falsefalse101false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.exxonmobil.com/taxonomy/role/disclosurepensionandotherpostretirementbenefitsfairvalueofbenefitplanassetsuspensiondetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse101falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Total Plan Assets [Member]
12/31/2010
USD ($)
$As_Of_12_31_20103133320http://www.sec.gov/CIK0000034088instant2010-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseTotal Plan Assets [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_TotalPlanAssetsMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$102falsefalseUSDtruefalse{us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis} : Pension Benefits - Non-U.S. [Member]
{us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis} : Total Plan Assets [Member]
12/31/2009
USD ($)
$As_Of_12_31_200951http://www.sec.gov/CIK0000034088instant2009-12-31T00:00:000001-01-01T00:00:00falsefalsePension Benefits - Non-U.S. [Member]us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignPensionPlansDefinedBenefitMemberus-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxisexplicitMemberfalsefalseTotal Plan Assets [Member]us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisxbrldihttp://xbrl.org/2006/xbrldixom_TotalPlanAssetsMemberus-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse102false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse1676500000016765falsetruefalsefalsefalse2truefalsefalse1540100000015401falsetruefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(iv)(b)(i)
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 49
falsefalse1For U.S. and non-U.S. equity securities held in the form of fund units that are redeemable at the measurement date, the unit value is treated as a Level 2 input. The fair value of the securities owned by the funds is based on observable quoted prices on active exchanges, which are Level 1 inputs. 2For corporate, government and asset-backed debt securities, fair value is based on observable inputs of comparable market transactions. 3For private equity, fair value is generally established by using revenue or earnings multiples or other relevant market data including Initial Public Offerings. 4For private mortgages, fair value is based on proprietary credit spread matrices developed using market data and monthly surveys of active mortgage bankers. 5For non-U.S. equity securities held in separate accounts, fair value is based on observable quoted prices on active exchanges. 6For corporate and government debt securities that are traded on active exchanges, fair value is based on observable quoted prices. 7For cash balances that are subject to withdrawal penalties or other adjustments, the fair value is treated as a Level 2 input. 8For real estate funds, fair value is based on appraised values developed using comparable market transactions. 3102Pension and Other Postretirement Benefits (Fair Value of Benefit Plan Assets- U.S. Pension) (Details) (USD $)MillionsUnKnownUnKnownUnKnownfalsetrue