2.2.0.25truefalse0609 - Disclosure - Asset Retirement Obligations (Details)truefalseIn Millionsfalse1falsefalseUSDtruefalse{dei_LegalEntityAxis} : Entergy Arkansas [Member] {us-gaap_RegulatoryLiabilityAxis} : Asset Retirement Obligation Costs [Member] 12/31/2010 USD ($) $BalanceAsOf_31Dec2010_Subsidiaries_Member_Asset_Retirement_Obligation_Costs_Memberhttp://www.sec.gov/CIK0000065984instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseEntergy Arkansas [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_SubsidiariesMemberdei_LegalEntityAxisexplicitMemberfalsefalseAsset Retirement Obligation Costs [Member]us-gaap_RegulatoryLiabilityAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_AssetRetirementObligationCostsMemberus-gaap_RegulatoryLiabilityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2falsefalseUSDtruefalse{dei_LegalEntityAxis} : Entergy Arkansas [Member] {us-gaap_RegulatoryLiabilityAxis} : Asset Retirement Obligation Costs [Member] 12/31/2009 USD ($) $BalanceAsOf_31Dec2009_Subsidiaries_Member_Asset_Retirement_Obligation_Costs_Memberhttp://www.sec.gov/CIK0000065984instant2009-12-31T00:00:000001-01-01T00:00:00falsefalseEntergy Arkansas [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_SubsidiariesMemberdei_LegalEntityAxisexplicitMemberfalsefalseAsset Retirement Obligation Costs [Member]us-gaap_RegulatoryLiabilityAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_AssetRetirementObligationCostsMemberus-gaap_RegulatoryLiabilityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://entergy.com/role/assetretirementobligationsdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse1falsefalseUSDtruefalse{dei_LegalEntityAxis} : Entergy Arkansas [Member] {us-gaap_RegulatoryLiabilityAxis} : Asset Retirement Obligation Costs [Member] 12/31/2010 USD ($) $BalanceAsOf_31Dec2010_Subsidiaries_Member_Asset_Retirement_Obligation_Costs_Memberhttp://www.sec.gov/CIK0000065984instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseEntergy Arkansas [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_SubsidiariesMemberdei_LegalEntityAxisexplicitMemberfalsefalseAsset Retirement Obligation Costs [Member]us-gaap_RegulatoryLiabilityAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_AssetRetirementObligationCostsMemberus-gaap_RegulatoryLiabilityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2falsefalseUSDtruefalse{dei_LegalEntityAxis} : Entergy Arkansas [Member] {us-gaap_RegulatoryLiabilityAxis} : Asset Retirement Obligation Costs [Member] 12/31/2009 USD ($) $BalanceAsOf_31Dec2009_Subsidiaries_Member_Asset_Retirement_Obligation_Costs_Memberhttp://www.sec.gov/CIK0000065984instant2009-12-31T00:00:000001-01-01T00:00:00falsefalseEntergy Arkansas [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_SubsidiariesMemberdei_LegalEntityAxisexplicitMemberfalsefalseAsset Retirement Obligation Costs [Member]us-gaap_RegulatoryLiabilityAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_AssetRetirementObligationCostsMemberus-gaap_RegulatoryLiabilityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseEntergy Arkansas [Member] | Asset Retirement Obligation Costs [Member]2true0us-gaap_RegulatoryLiabilitiesLineItemsus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringLine items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.falsefalseRegulatory Liabilities [Line Items]3false0us-gaap_RegulatoryLiabilitiesus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse-24000000-24.0falsetruefalsefalsefalse2truefalsefalse-7300000-7.3falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount for the individual regulatory liability as itemized in a table of regulatory liabilities as of the end of the periodReference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 71 -Paragraph 11 falsefalseRegulatory Liabilities5false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://entergy.com/role/assetretirementobligationsdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalseUSDtruefalse{dei_LegalEntityAxis} : Entergy Louisiana [Member] {us-gaap_RegulatoryLiabilityAxis} : Asset Retirement Obligation Costs [Member] 12/31/2010 USD ($) $BalanceAsOf_31Dec2010_Registrant_Subsidiary_Two_Member_Asset_Retirement_Obligation_Costs_Memberhttp://www.sec.gov/CIK0000065984instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseEntergy Louisiana [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldietr_RegistrantSubsidiaryTwoMemberdei_LegalEntityAxisexplicitMemberfalsefalseAsset Retirement Obligation Costs [Member]us-gaap_RegulatoryLiabilityAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_AssetRetirementObligationCostsMemberus-gaap_RegulatoryLiabilityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$4falsefalseUSDtruefalse{dei_LegalEntityAxis} : Entergy Louisiana [Member] {us-gaap_RegulatoryLiabilityAxis} : Asset Retirement Obligation Costs [Member] 12/31/2009 USD ($) $BalanceAsOf_31Dec2009_Registrant_Subsidiary_Two_Member_Asset_Retirement_Obligation_Costs_Memberhttp://www.sec.gov/CIK0000065984instant2009-12-31T00:00:000001-01-01T00:00:00falsefalseEntergy Louisiana [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldietr_RegistrantSubsidiaryTwoMemberdei_LegalEntityAxisexplicitMemberfalsefalseAsset Retirement Obligation Costs [Member]us-gaap_RegulatoryLiabilityAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_AssetRetirementObligationCostsMemberus-gaap_RegulatoryLiabilityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseEntergy Louisiana [Member] | Asset Retirement Obligation Costs [Member]6true0us-gaap_RegulatoryLiabilitiesLineItemsus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringLine items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.falsefalseRegulatory Liabilities [Line Items]7false0us-gaap_RegulatoryLiabilitiesus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse-52900000-52.9falsefalsefalsefalsefalse2truefalsefalse-21700000-21.7falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount for the individual regulatory liability as itemized in a table of regulatory liabilities as of the end of the periodReference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 71 -Paragraph 11 falsefalseRegulatory Liabilities9false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://entergy.com/role/assetretirementobligationsdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse5falsefalseUSDtruefalse{dei_LegalEntityAxis} : Entergy Gulf States Louisiana [Member] {us-gaap_RegulatoryLiabilityAxis} : Asset Retirement Obligation Costs [Member] 12/31/2010 USD ($) $BalanceAsOf_31Dec2010_Registrant_Subsidiary_One_Member_Asset_Retirement_Obligation_Costs_Memberhttp://www.sec.gov/CIK0000065984instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseEntergy Gulf States Louisiana [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldietr_RegistrantSubsidiaryOneMemberdei_LegalEntityAxisexplicitMemberfalsefalseAsset Retirement Obligation Costs [Member]us-gaap_RegulatoryLiabilityAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_AssetRetirementObligationCostsMemberus-gaap_RegulatoryLiabilityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$6falsefalseUSDtruefalse{dei_LegalEntityAxis} : Entergy Gulf States Louisiana [Member] {us-gaap_RegulatoryLiabilityAxis} : Asset Retirement Obligation Costs [Member] 12/31/2009 USD ($) $BalanceAsOf_31Dec2009_Registrant_Subsidiary_One_Member_Asset_Retirement_Obligation_Costs_Memberhttp://www.sec.gov/CIK0000065984instant2009-12-31T00:00:000001-01-01T00:00:00falsefalseEntergy Gulf States Louisiana [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldietr_RegistrantSubsidiaryOneMemberdei_LegalEntityAxisexplicitMemberfalsefalseAsset Retirement Obligation Costs [Member]us-gaap_RegulatoryLiabilityAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_AssetRetirementObligationCostsMemberus-gaap_RegulatoryLiabilityAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseEntergy Gulf States Louisiana [Member] | Asset Retirement Obligation Costs [Member]10true0us-gaap_RegulatoryLiabilitiesLineItemsus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringLine items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.falsefalseRegulatory Liabilities [Line Items]11false0us-gaap_RegulatoryLiabilitiesus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse-24900000-24.9falsefalsefalsefalsefalse2truefalsefalse-7500000-7.5falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount for the individual regulatory liability as itemized in a table of regulatory liabilities as of the end of the periodReference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 71 -Paragraph 11 falsefalseRegulatory Liabilities13false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://entergy.com/role/assetretirementobligationsdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse7falsefalseUSDtruefalse{dei_LegalEntityAxis} : System Energy [Member] {us-gaap_RegulatoryAssetAxis} : Asset Retirement Obligation Costs [Member] 12/31/2010 USD ($) $BalanceAsOf_31Dec2010_Registrant_Subsidiary_Six_Member_Asset_Retirement_Obligation_Costs_Memberhttp://www.sec.gov/CIK0000065984instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseSystem Energy [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldietr_RegistrantSubsidiarySixMemberdei_LegalEntityAxisexplicitMemberfalsefalseAsset Retirement Obligation Costs [Member]us-gaap_RegulatoryAssetAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_AssetRetirementObligationCostsMemberus-gaap_RegulatoryAssetAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$8falsefalseUSDtruefalse{dei_LegalEntityAxis} : System Energy [Member] {us-gaap_RegulatoryAssetAxis} : Asset Retirement Obligation Costs [Member] 12/31/2009 USD ($) $BalanceAsOf_31Dec2009_Registrant_Subsidiary_Six_Member_Asset_Retirement_Obligation_Costs_Memberhttp://www.sec.gov/CIK0000065984instant2009-12-31T00:00:000001-01-01T00:00:00falsefalseSystem Energy [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldietr_RegistrantSubsidiarySixMemberdei_LegalEntityAxisexplicitMemberfalsefalseAsset Retirement Obligation Costs [Member]us-gaap_RegulatoryAssetAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_AssetRetirementObligationCostsMemberus-gaap_RegulatoryAssetAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseSystem Energy [Member] | Asset Retirement Obligation Costs [Member]15true0us-gaap_RegulatoryAssetLineItemsus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringLine items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.falsefalseRegulatory Assets [Line Items]16false0us-gaap_RegulatoryAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse1220000012.2falsefalsefalsefalsefalse2truefalsefalse1390000013.9falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount for the individual regulatory asset as itemized in a table of regulatory assets as of the end of the periodReference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 71 -Paragraph 9, 10 falsefalseRegulatory Assets17false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://entergy.com/role/assetretirementobligationsdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse9falsefalseUSDtruefalse{dei_LegalEntityAxis} : Entergy Mississippi [Member] {us-gaap_RegulatoryAssetAxis} : Asset Retirement Obligation Costs [Member] 12/31/2010 USD ($) $BalanceAsOf_31Dec2010_Registrant_Subsidiary_Three_Member_Asset_Retirement_Obligation_Costs_Memberhttp://www.sec.gov/CIK0000065984instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseEntergy Mississippi [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldietr_RegistrantSubsidiaryThreeMemberdei_LegalEntityAxisexplicitMemberfalsefalseAsset Retirement Obligation Costs [Member]us-gaap_RegulatoryAssetAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_AssetRetirementObligationCostsMemberus-gaap_RegulatoryAssetAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$10falsefalseUSDtruefalse{dei_LegalEntityAxis} : Entergy Mississippi [Member] {us-gaap_RegulatoryAssetAxis} : Asset Retirement Obligation Costs [Member] 12/31/2009 USD ($) $BalanceAsOf_31Dec2009_Registrant_Subsidiary_Three_Member_Asset_Retirement_Obligation_Costs_Memberhttp://www.sec.gov/CIK0000065984instant2009-12-31T00:00:000001-01-01T00:00:00falsefalseEntergy Mississippi [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldietr_RegistrantSubsidiaryThreeMemberdei_LegalEntityAxisexplicitMemberfalsefalseAsset Retirement Obligation Costs [Member]us-gaap_RegulatoryAssetAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_AssetRetirementObligationCostsMemberus-gaap_RegulatoryAssetAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseEntergy Mississippi [Member] | Asset Retirement Obligation Costs [Member]19true0us-gaap_RegulatoryAssetLineItemsus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringLine items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.falsefalseRegulatory Assets [Line Items]20false0us-gaap_RegulatoryAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse4610000046.1falsefalsefalsefalsefalse2truefalsefalse4450000044.5falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount for the individual regulatory asset as itemized in a table of regulatory assets as of the end of the periodReference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 71 -Paragraph 9, 10 falsefalseRegulatory Assets21false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://entergy.com/role/assetretirementobligationsdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse11falsefalseUSDtruefalse{dei_LegalEntityAxis} : Entergy New Orleans [Member] {us-gaap_RegulatoryAssetAxis} : Asset Retirement Obligation Costs [Member] 12/31/2010 USD ($) $BalanceAsOf_31Dec2010_Registrant_Subsidiary_Four_Member_Asset_Retirement_Obligation_Costs_Memberhttp://www.sec.gov/CIK0000065984instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseEntergy New Orleans [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldietr_RegistrantSubsidiaryFourMemberdei_LegalEntityAxisexplicitMemberfalsefalseAsset Retirement Obligation Costs [Member]us-gaap_RegulatoryAssetAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_AssetRetirementObligationCostsMemberus-gaap_RegulatoryAssetAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$12falsefalseUSDtruefalse{dei_LegalEntityAxis} : Entergy New Orleans [Member] {us-gaap_RegulatoryAssetAxis} : Asset Retirement Obligation Costs [Member] 12/31/2009 USD ($) $BalanceAsOf_31Dec2009_Registrant_Subsidiary_Four_Member_Asset_Retirement_Obligation_Costs_Memberhttp://www.sec.gov/CIK0000065984instant2009-12-31T00:00:000001-01-01T00:00:00falsefalseEntergy New Orleans [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldietr_RegistrantSubsidiaryFourMemberdei_LegalEntityAxisexplicitMemberfalsefalseAsset Retirement Obligation Costs [Member]us-gaap_RegulatoryAssetAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_AssetRetirementObligationCostsMemberus-gaap_RegulatoryAssetAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseEntergy New Orleans [Member] | Asset Retirement Obligation Costs [Member]23true0us-gaap_RegulatoryAssetLineItemsus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringLine items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.falsefalseRegulatory Assets [Line Items]24false0us-gaap_RegulatoryAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse1540000015.4falsefalsefalsefalsefalse2truefalsefalse1520000015.2falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount for the individual regulatory asset as itemized in a table of regulatory assets as of the end of the periodReference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 71 -Paragraph 9, 10 falsefalseRegulatory Assets25false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://entergy.com/role/assetretirementobligationsdetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse13falsefalseUSDtruefalse{dei_LegalEntityAxis} : Entergy Texas [Member] {us-gaap_RegulatoryAssetAxis} : Asset Retirement Obligation Costs [Member] 12/31/2010 USD ($) $BalanceAsOf_31Dec2010_Registrant_Subsidiary_Five_Member_Asset_Retirement_Obligation_Costs_Memberhttp://www.sec.gov/CIK0000065984instant2010-12-31T00:00:000001-01-01T00:00:00falsefalseEntergy Texas [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldietr_RegistrantSubsidiaryFiveMemberdei_LegalEntityAxisexplicitMemberfalsefalseAsset Retirement Obligation Costs [Member]us-gaap_RegulatoryAssetAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_AssetRetirementObligationCostsMemberus-gaap_RegulatoryAssetAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$14falsefalseUSDtruefalse{dei_LegalEntityAxis} : Entergy Texas [Member] {us-gaap_RegulatoryAssetAxis} : Asset Retirement Obligation Costs [Member] 12/31/2009 USD ($) $BalanceAsOf_31Dec2009_Registrant_Subsidiary_Five_Member_Asset_Retirement_Obligation_Costs_Memberhttp://www.sec.gov/CIK0000065984instant2009-12-31T00:00:000001-01-01T00:00:00falsefalseEntergy Texas [Member]dei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldietr_RegistrantSubsidiaryFiveMemberdei_LegalEntityAxisexplicitMemberfalsefalseAsset Retirement Obligation Costs [Member]us-gaap_RegulatoryAssetAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_AssetRetirementObligationCostsMemberus-gaap_RegulatoryAssetAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseEntergy Texas [Member] | Asset Retirement Obligation Costs [Member]27true0us-gaap_RegulatoryAssetLineItemsus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringLine items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.falsefalseRegulatory Assets [Line Items]28false0us-gaap_RegulatoryAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse73000007.3falsetruefalsefalsefalse2truefalsefalse72000007.2falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount for the individual regulatory asset as itemized in a table of regulatory assets as of the end of the periodReference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 71 -Paragraph 9, 10 falsefalseRegulatory Assets221Asset Retirement Obligations (Details) (USD $)HundredThousandsUnKnownUnKnownUnKnownfalsetrue