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No authoritative reference available. false 14 Estimated effect of future Medicare subsidies APBO and other postretirement benefit cost 2 etr_EstimatedEffectOfFutureMedicareSubsidiesApboAndOtherPostretirementBenefitCostAbstract etr false na duration Estimated effect of future Medicare subsidies APBO and other postretirement benefit cost. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:stringItemType string Estimated effect of future Medicare subsidies APBO and other postretirement benefit cost. false 15 Reduction in Accumulated Postretirement Benefit Obligation (APBO) 2 us-gaap_PrescriptionDrugBenefitReductionInAccumulatedPostretirementBenefitObligationForSubsidy us-gaap true debit instant No definition available. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false true false false 215000000 215000000 false false false xbrli:monetaryItemType monetary Amount of the reduction in the accumulated postretirement benefit obligation for the government subsidy related to prescription drug benefits attributed to past service. Disclosure relates to the first period in which an employer includes the effects of the subsidy in measuring the accumulated postretirement benefit obligation and net periodic postretirement benefit cost. 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No authoritative reference available. false 17 Medicare subsidies received 2 etr_MedicareSubsidiesForPrescriptionDrugClaimsReceived etr false credit duration Medicare subsidies for prescription drug claims received. false false false false false false false false false false false terselabel false 1 false true false false 2200000 2200000 false false false 2 false false false false 0 0 false false false 3 false true false false 4000000 4000000 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary Medicare subsidies for prescription drug claims received. No authoritative reference available. false 18 Retirement and Other Postretirement Benefits (Textuals) [Abstract] 2 etr_RetirementAndOtherPostretirementBenefitsTextualsAbstract etr false na duration Retirement and Other Postretirement Benefits. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:stringItemType string Retirement and Other Postretirement Benefits. false 19 Pension cost for non-qualified pension plans 2 etr_PensionCostForNonQualifiedPensionPlans etr false debit duration Pension cost for non-qualified pension plans. false false false false false false false false false false false verboselabel false 1 false true false false 4700000 4700000 false false false 2 false true false false 10400000 10400000 false false false 3 false true false false 20900000 20900000 false false false 4 false true false false 19300000 19300000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary Pension cost for non-qualified pension plans. No authoritative reference available. false 20 Settlement charge related to the payment of lump sum benefits out of plan 2 etr_SettlementChargeRelatedToPaymentOfLumpSumBenefitsOutOfPlan etr false debit duration Settlement charge related to the payment of lump sum benefits out of plan. false false false false false false false false false false false verboselabel false 1 false true false false 400000 400000 false false false 2 false true false false 6200000 6200000 false false false 3 false true false false 7300000 7300000 false false false 4 false true false false 6200000 6200000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary Settlement charge related to the payment of lump sum benefits out of plan. No authoritative reference available. false 21 Expected 2010 pension contributions 2 etr_ExpectedCurrentYearPensionContributions etr false debit duration Expected current year pension contributions. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false true false false 254000000 254000000 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary Expected current year pension contributions. No authoritative reference available. false 22 Remaining estimated pension contributions to be made in 2010 2 etr_RemainingEstimatedPensionContributionsDuringPeriod etr false debit duration Remaining estimated pension contributions during the period. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false true false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary Remaining estimated pension contributions during the period. 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Disclosure relates to the first period in which an employer includes the effects of the subsidy in measuring the accumulated postretirement benefit obligation and net periodic postretirement benefit cost. 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No authoritative reference available. false 25 Medicare subsidies for prescription drug claims received 2 etr_MedicareSubsidiesForPrescriptionDrugClaimsReceived etr false credit duration Medicare subsidies for prescription drug claims received. false false false false false false false false false false false verboselabel false 1 false true false false 2200000 2200000 false false false 2 false false false false 0 0 false false false 3 false true false false 4000000 4000000 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary Medicare subsidies for prescription drug claims received. 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No authoritative reference available. false 27 Components of net pension cost and net other postretirement benefit cost 2 us-gaap_DefinedBenefitPensionPlansAndDefinedBenefitPostretirementPlansDisclosureAbstract us-gaap true na duration No definition available. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 35 Non-qualified pension cost 2 etr_NonQualifiedPensionCost etr false debit duration Non-Qualified pension cost. false false false false false false false false false false false verboselabel false 1 false true false false 105000 105000 false false false 2 false false false false 0 0 false false false 3 false true false false 395000 395000 [1] false false false 4 false true false false 297000 297000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary Non-Qualified pension cost. No authoritative reference available. false 36 Settlement charge recognized included in cost above 2 etr_SettlementChargeRecognizedIncludedInNonQualifiedPensionCost etr false debit duration Settlement Charge Recognized included in Non qualified Pension Cost. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false true false false 99000 99000 false false false 3 false true false false 86000 86000 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary Settlement Charge Recognized included in Non qualified Pension Cost. No authoritative reference available. false 37 Employer Contributions 2 etr_EmployerContributionsAbstract etr false na duration Employer Contributions. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:stringItemType string Employer Contributions. false 38 Pension contributions made through October 2010 2 us-gaap_DefinedBenefitPlanContributionsByEmployer us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false true false false 71177000 71177000 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The amount of contributions made by the employer. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph b false 39 Estimated effect of future Medicare subsidies APBO and other postretirement benefit cost 2 etr_EstimatedEffectOfFutureMedicareSubsidiesApboAndOtherPostretirementBenefitCostAbstract etr false na duration Estimated effect of future Medicare subsidies APBO and other postretirement benefit cost. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:stringItemType string Estimated effect of future Medicare subsidies APBO and other postretirement benefit cost. false 40 Reduction in Accumulated Postretirement Benefit Obligation (APBO) 2 us-gaap_PrescriptionDrugBenefitReductionInAccumulatedPostretirementBenefitObligationForSubsidy us-gaap true debit instant No definition available. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false true false false -45809000 -45809000 false false false xbrli:monetaryItemType monetary Amount of the reduction in the accumulated postretirement benefit obligation for the government subsidy related to prescription drug benefits attributed to past service. 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No authoritative reference available. false 42 Medicare subsidies received 2 etr_MedicareSubsidiesForPrescriptionDrugClaimsReceived etr false credit duration Medicare subsidies for prescription drug claims received. false false false false false false false false false false false terselabel false 1 false true false false 502000 502000 false false false 2 false false false false 0 0 false false false 3 false true false false 907000 907000 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary Medicare subsidies for prescription drug claims received. No authoritative reference available. false 43 Retirement and Other Postretirement Benefits (Textuals) [Abstract] 2 etr_RetirementAndOtherPostretirementBenefitsTextualsAbstract etr false na duration Retirement and Other Postretirement Benefits. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:stringItemType string Retirement and Other Postretirement Benefits. false 48 Reduction in Accumulated Postretirement Benefit Obligation (APBO) 2 us-gaap_PrescriptionDrugBenefitReductionInAccumulatedPostretirementBenefitObligationForSubsidy us-gaap true debit instant No definition available. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false true false false -45809000 -45809000 false false false xbrli:monetaryItemType monetary Amount of the reduction in the accumulated postretirement benefit obligation for the government subsidy related to prescription drug benefits attributed to past service. Disclosure relates to the first period in which an employer includes the effects of the subsidy in measuring the accumulated postretirement benefit obligation and net periodic postretirement benefit cost. 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The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 106 -Paragraph 518 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 87 -Paragraph 264 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph a, h false 54 Interest cost 2 us-gaap_DefinedBenefitPlanInterestCost us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 12319000 12319000 false false false 2 false true false false 11761000 11761000 false false false 3 false true false false 36957000 36957000 false false false 4 false true false false 35283000 35283000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 106 -Paragraph 518 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 87 -Paragraph 264 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph a, h false 55 Expected return on assets 2 us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets us-gaap true credit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false -12659000 -12659000 false false false 2 false true false false -12187000 -12187000 false false false 3 false true false false -37977000 -37977000 false false false 4 false true false false -36561000 -36561000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary An amount calculated as a basis for determining the extent of delayed recognition of the effects of changes in the fair value of assets. The expected return on plan assets is determined based on the expected long-term rate of return on plan assets and the market-related value of plan assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 106 -Paragraph 518 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 87 -Paragraph 264 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph h false 57 Amortization of prior service cost 2 us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 196000 196000 false false false 2 false true false false 212000 212000 false false false 3 false true false false 588000 588000 false false false 4 false true false false 636000 636000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The amount of the prior service cost or credit recognized in net periodic benefit cost relating to benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation. 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Periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain or loss, prior service cost or credit, transition asset or obligation, and gain or loss due to settlements or curtailments). Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph h true 76 Entergy Arkansa's [Member] | Net Other Postretirement Benefit Cost [Member] 0 na true na na No definition available. false true false false false false false false false false false http://entergy.com/role/retirementandotherpostretirementbenefitsdetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false false 17 USD true false false false Entergy Arkansa's [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_SubsidiariesMember dei_LegalEntityAxis explicitMember false false Net Other Postretirement Benefit Cost [Member] us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 18 USD true false false false Entergy Arkansa's [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_SubsidiariesMember dei_LegalEntityAxis explicitMember false false Net Other Postretirement Benefit Cost [Member] us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 19 USD true false false false Entergy Arkansa's [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_SubsidiariesMember dei_LegalEntityAxis explicitMember false false Net Other Postretirement Benefit Cost [Member] us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 20 USD true false false false Entergy Arkansa's [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_SubsidiariesMember dei_LegalEntityAxis explicitMember false false Net Other Postretirement Benefit Cost [Member] us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 77 Components of net pension cost and net other postretirement benefit cost 2 us-gaap_DefinedBenefitPensionPlansAndDefinedBenefitPostretirementPlansDisclosureAbstract us-gaap true na duration No definition available. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 78 Service cost - benefits earned during the period 2 us-gaap_DefinedBenefitPlanServiceCost us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 1843000 1843000 false false false 2 false true false false 1765000 1765000 false false false 3 false true false false 5529000 5529000 false false false 4 false true false false 5295000 5295000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 106 -Paragraph 518 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 87 -Paragraph 264 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph a, h false 79 Interest cost 2 us-gaap_DefinedBenefitPlanInterestCost us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 3629000 3629000 false false false 2 false true false false 3759000 3759000 false false false 3 false true false false 10887000 10887000 false false false 4 false true false false 11277000 11277000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time. 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The expected return on plan assets is determined based on the expected long-term rate of return on plan assets and the market-related value of plan assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 106 -Paragraph 518 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 87 -Paragraph 264 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph h false 81 Amortization of transition obligation 2 us-gaap_DefinedBenefitPlanAmortizationOfTransitionObligationsAssets us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 205000 205000 false false false 2 false true false false 205000 205000 false false false 3 false true false false 615000 615000 false false false 4 false true false false 615000 615000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The amount of the transition obligation or asset recognized in net periodic benefit cost. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph h false 82 Amortization of prior service cost 2 us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false -197000 -197000 false false false 2 false true false false -197000 -197000 false false false 3 false true false false -591000 -591000 false false false 4 false true false false -591000 -591000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The amount of the prior service cost or credit recognized in net periodic benefit cost relating to benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph h false 83 Amortization of loss 2 us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses us-gaap true credit duration No definition available. false false false false false false false false false false false totallabel false 1 false true false false 1690000 1690000 false false false 2 false true false false 2087000 2087000 false false false 3 false true false false 5070000 5070000 false false false 4 false true false false 6261000 6261000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The amount of gains or losses recognized in net periodic benefit cost Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph h true 84 Net pension costs/(income) and other postretirement benefit cost 2 us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost us-gaap true debit duration No definition available. false false false false false false false false false false false totallabel false 1 false true false false 4725000 4725000 false false false 2 false true false false 5476000 5476000 false false false 3 false true false false 14175000 14175000 false false false 4 false true false false 16428000 16428000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The total amount of net periodic benefit cost for defined benefit plans for the period. Periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain or loss, prior service cost or credit, transition asset or obligation, and gain or loss due to settlements or curtailments). Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph h true 101 Entergy Gulf States Louisiana [Member] 0 na true na na No definition available. false true false false false false false false false false false http://entergy.com/role/retirementandotherpostretirementbenefitsdetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false false 21 USD true false false false Entergy Gulf States Louisiana [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi etr_RegistrantSubsidiaryOneMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 $ false 22 USD true false false false Entergy Gulf States Louisiana [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi etr_RegistrantSubsidiaryOneMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 23 USD true false false false Entergy Gulf States Louisiana [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi etr_RegistrantSubsidiaryOneMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 $ false 24 USD true false false false Entergy Gulf States Louisiana [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi etr_RegistrantSubsidiaryOneMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 25 USD true false false false Entergy Gulf States Louisiana [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi etr_RegistrantSubsidiaryOneMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 26 USD true false false false Entergy Gulf States Louisiana [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi etr_RegistrantSubsidiaryOneMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 102 Components of net pension cost and net other postretirement benefit cost 2 us-gaap_DefinedBenefitPensionPlansAndDefinedBenefitPostretirementPlansDisclosureAbstract us-gaap true na duration No definition available. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 110 Non-qualified pension cost 2 etr_NonQualifiedPensionCost etr false debit duration Non-Qualified pension cost. false false false false false false false false false false false verboselabel false 1 false true false false 41000 41000 false false false 2 false true false false 947000 947000 false false false 3 false true false false 122000 122000 false false false 4 false true false false 1215000 1215000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary Non-Qualified pension cost. No authoritative reference available. false 111 Settlement charge recognized included in cost above 2 etr_SettlementChargeRecognizedIncludedInNonQualifiedPensionCost etr false debit duration Settlement Charge Recognized included in Non qualified Pension Cost. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false true false false 1021000 1021000 false false false 3 false false false false 0 0 false false false 4 false true false false 947000 947000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary Settlement Charge Recognized included in Non qualified Pension Cost. No authoritative reference available. false 112 Employer Contributions 2 etr_EmployerContributionsAbstract etr false na duration Employer Contributions. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:stringItemType string Employer Contributions. false 113 Pension contributions made through October 2010 2 us-gaap_DefinedBenefitPlanContributionsByEmployer us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false true false false 18858000 18858000 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The amount of contributions made by the employer. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph b false 114 Estimated effect of future Medicare subsidies APBO and other postretirement benefit cost 2 etr_EstimatedEffectOfFutureMedicareSubsidiesApboAndOtherPostretirementBenefitCostAbstract etr false na duration Estimated effect of future Medicare subsidies APBO and other postretirement benefit cost. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:stringItemType string Estimated effect of future Medicare subsidies APBO and other postretirement benefit cost. false 115 Reduction in Accumulated Postretirement Benefit Obligation (APBO) 2 us-gaap_PrescriptionDrugBenefitReductionInAccumulatedPostretirementBenefitObligationForSubsidy us-gaap true debit instant No definition available. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false true false false -22227000 -22227000 false false false xbrli:monetaryItemType monetary Amount of the reduction in the accumulated postretirement benefit obligation for the government subsidy related to prescription drug benefits attributed to past service. Disclosure relates to the first period in which an employer includes the effects of the subsidy in measuring the accumulated postretirement benefit obligation and net periodic postretirement benefit cost. 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No authoritative reference available. false 127 Components of net pension cost and net other postretirement benefit cost 2 us-gaap_DefinedBenefitPensionPlansAndDefinedBenefitPostretirementPlansDisclosureAbstract us-gaap true na duration No definition available. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 128 Service cost - benefits earned during the period 2 us-gaap_DefinedBenefitPlanServiceCost us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 2116000 2116000 false false false 2 false true false false 1748000 1748000 false false false 3 false true false false 6348000 6348000 false false false 4 false true false false 5244000 5244000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan. 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Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 106 -Paragraph 518 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 87 -Paragraph 264 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph a, h false 130 Expected return on assets 2 us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets us-gaap true credit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false -7688000 -7688000 false false false 2 false true false false -7516000 -7516000 false false false 3 false true false false -23064000 -23064000 false false false 4 false true false false -22548000 -22548000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary An amount calculated as a basis for determining the extent of delayed recognition of the effects of changes in the fair value of assets. The expected return on plan assets is determined based on the expected long-term rate of return on plan assets and the market-related value of plan assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 106 -Paragraph 518 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 87 -Paragraph 264 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph h false 132 Amortization of prior service cost 2 us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 75000 75000 false false false 2 false true false false 110000 110000 false false false 3 false true false false 225000 225000 false false false 4 false true false false 330000 330000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The amount of the prior service cost or credit recognized in net periodic benefit cost relating to benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation. 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Periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain or loss, prior service cost or credit, transition asset or obligation, and gain or loss due to settlements or curtailments). 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No authoritative reference available. false 152 Components of net pension cost and net other postretirement benefit cost 2 us-gaap_DefinedBenefitPensionPlansAndDefinedBenefitPostretirementPlansDisclosureAbstract us-gaap true na duration No definition available. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 153 Service cost - benefits earned during the period 2 us-gaap_DefinedBenefitPlanServiceCost us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 1370000 1370000 false false false 2 false true false false 1196000 1196000 false false false 3 false true false false 4110000 4110000 false false false 4 false true false false 3588000 3588000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan. 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Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 106 -Paragraph 518 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 87 -Paragraph 264 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph a, h false 156 Amortization of transition obligation 2 us-gaap_DefinedBenefitPlanAmortizationOfTransitionObligationsAssets us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 60000 60000 false false false 2 false true false false 60000 60000 false false false 3 false true false false 180000 180000 false false false 4 false true false false 180000 180000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The amount of the transition obligation or asset recognized in net periodic benefit cost. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph h false 157 Amortization of prior service cost 2 us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false -77000 -77000 false false false 2 false true false false -77000 -77000 false false false 3 false true false false -231000 -231000 false false false 4 false true false false -231000 -231000 [1] false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The amount of the prior service cost or credit recognized in net periodic benefit cost relating to benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation. 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Periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain or loss, prior service cost or credit, transition asset or obligation, and gain or loss due to settlements or curtailments). Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph h true 176 Entergy Louisiana [Member] 0 na true na na No definition available. false true false false false false false false false false false http://entergy.com/role/retirementandotherpostretirementbenefitsdetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false false 35 USD true false false false Entergy Louisiana [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi etr_RegistrantSubsidiaryTwoMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 $ false 36 USD true false false false Entergy Louisiana [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi etr_RegistrantSubsidiaryTwoMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 37 USD true false false false Entergy Louisiana [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi etr_RegistrantSubsidiaryTwoMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 $ false 38 USD true false false false Entergy Louisiana [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi etr_RegistrantSubsidiaryTwoMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 39 USD true false false false Entergy Louisiana [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi etr_RegistrantSubsidiaryTwoMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 40 USD true false false false Entergy Louisiana [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi etr_RegistrantSubsidiaryTwoMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 177 Components of net pension cost and net other postretirement benefit cost 2 us-gaap_DefinedBenefitPensionPlansAndDefinedBenefitPostretirementPlansDisclosureAbstract us-gaap true na duration No definition available. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 185 Non-qualified pension cost 2 etr_NonQualifiedPensionCost etr false debit duration Non-Qualified pension cost. false false false false false false false false false false false verboselabel false 1 false true false false 6000 6000 false false false 2 false true false false 9000 9000 false false false 3 false true false false 17000 17000 false false false 4 false true false false 26000 26000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary Non-Qualified pension cost. No authoritative reference available. false 186 Settlement charge recognized included in cost above 2 etr_SettlementChargeRecognizedIncludedInNonQualifiedPensionCost etr false debit duration Settlement Charge Recognized included in Non qualified Pension Cost. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false true false false 14000 14000 false false false 3 false false false false 0 0 false false false 4 false true false false 9000 9000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary Settlement Charge Recognized included in Non qualified Pension Cost. No authoritative reference available. false 187 Employer Contributions 2 etr_EmployerContributionsAbstract etr false na duration Employer Contributions. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:stringItemType string Employer Contributions. false 188 Pension contributions made through October 2010 2 us-gaap_DefinedBenefitPlanContributionsByEmployer us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false true false false 35909000 35909000 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The amount of contributions made by the employer. 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Disclosure relates to the first period in which an employer includes the effects of the subsidy in measuring the accumulated postretirement benefit obligation and net periodic postretirement benefit cost. 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No authoritative reference available. false 192 Medicare subsidies received 2 etr_MedicareSubsidiesForPrescriptionDrugClaimsReceived etr false credit duration Medicare subsidies for prescription drug claims received. false false false false false false false false false false false terselabel false 1 false true false false 332000 332000 false false false 2 false false false false 0 0 false false false 3 false true false false 593000 593000 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary Medicare subsidies for prescription drug claims received. 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No authoritative reference available. false 202 Components of net pension cost and net other postretirement benefit cost 2 us-gaap_DefinedBenefitPensionPlansAndDefinedBenefitPostretirementPlansDisclosureAbstract us-gaap true na duration No definition available. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 203 Service cost - benefits earned during the period 2 us-gaap_DefinedBenefitPlanServiceCost us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 2443000 2443000 false false false 2 false true false false 1974000 1974000 false false false 3 false true false false 7329000 7329000 false false false 4 false true false false 5922000 5922000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan. 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The expected return on plan assets is determined based on the expected long-term rate of return on plan assets and the market-related value of plan assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 106 -Paragraph 518 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 87 -Paragraph 264 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph h false 207 Amortization of prior service cost 2 us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 119000 119000 false false false 2 false true false false 119000 119000 false false false 3 false true false false 357000 357000 false false false 4 false true false false 357000 357000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The amount of the prior service cost or credit recognized in net periodic benefit cost relating to benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation. 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Periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain or loss, prior service cost or credit, transition asset or obligation, and gain or loss due to settlements or curtailments). 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No authoritative reference available. false 227 Components of net pension cost and net other postretirement benefit cost 2 us-gaap_DefinedBenefitPensionPlansAndDefinedBenefitPostretirementPlansDisclosureAbstract us-gaap true na duration No definition available. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 228 Service cost - benefits earned during the period 2 us-gaap_DefinedBenefitPlanServiceCost us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 1371000 1371000 false false false 2 false true false false 1147000 1147000 false false false 3 false true false false 4113000 4113000 false false false 4 false true false false 3441000 3441000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan. 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Periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain or loss, prior service cost or credit, transition asset or obligation, and gain or loss due to settlements or curtailments). Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph h true 251 Entergy Mississippi [Member] 0 na true na na No definition available. false true false false false false false false false false false http://entergy.com/role/retirementandotherpostretirementbenefitsdetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false false 49 USD true false false false Entergy Mississippi [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi etr_RegistrantSubsidiaryThreeMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 50 USD true false false false Entergy Mississippi [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi etr_RegistrantSubsidiaryThreeMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 51 USD true false false false Entergy Mississippi [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi etr_RegistrantSubsidiaryThreeMember dei_LegalEntityAxis explicitMember Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 52 USD true false false false Entergy Mississippi [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi etr_RegistrantSubsidiaryThreeMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 53 USD true false false false Entergy Mississippi [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi etr_RegistrantSubsidiaryThreeMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 54 USD true false false false Entergy Mississippi [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi etr_RegistrantSubsidiaryThreeMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 252 Components of net pension cost and net other postretirement benefit cost 2 us-gaap_DefinedBenefitPensionPlansAndDefinedBenefitPostretirementPlansDisclosureAbstract us-gaap true na duration No definition available. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 260 Non-qualified pension cost 2 etr_NonQualifiedPensionCost etr false debit duration Non-Qualified pension cost. false false false false false false false false false false false verboselabel false 1 false true false false 52000 52000 false false false 2 false false false false 0 0 false false false 3 false true false false 153000 153000 false false false 4 false true false false 129000 129000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary Non-Qualified pension cost. 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No authoritative reference available. false 262 Employer Contributions 2 etr_EmployerContributionsAbstract etr false na duration Employer Contributions. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:stringItemType string Employer Contributions. false 263 Pension contributions made through October 2010 2 us-gaap_DefinedBenefitPlanContributionsByEmployer us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false true false false 17792000 17792000 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The amount of contributions made by the employer. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph b false 264 Estimated effect of future Medicare subsidies APBO and other postretirement benefit cost 2 etr_EstimatedEffectOfFutureMedicareSubsidiesApboAndOtherPostretirementBenefitCostAbstract etr false na duration Estimated effect of future Medicare subsidies APBO and other postretirement benefit cost. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:stringItemType string Estimated effect of future Medicare subsidies APBO and other postretirement benefit cost. false 265 Reduction in Accumulated Postretirement Benefit Obligation (APBO) 2 us-gaap_PrescriptionDrugBenefitReductionInAccumulatedPostretirementBenefitObligationForSubsidy us-gaap true debit instant No definition available. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false true false false -14824000 -14824000 false false false xbrli:monetaryItemType monetary Amount of the reduction in the accumulated postretirement benefit obligation for the government subsidy related to prescription drug benefits attributed to past service. Disclosure relates to the first period in which an employer includes the effects of the subsidy in measuring the accumulated postretirement benefit obligation and net periodic postretirement benefit cost. 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No authoritative reference available. false 268 Retirement and Other Postretirement Benefits (Textuals) [Abstract] 2 etr_RetirementAndOtherPostretirementBenefitsTextualsAbstract etr false na duration Retirement and Other Postretirement Benefits. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:stringItemType string Retirement and Other Postretirement Benefits. false 273 Reduction in Accumulated Postretirement Benefit Obligation (APBO) 2 us-gaap_PrescriptionDrugBenefitReductionInAccumulatedPostretirementBenefitObligationForSubsidy us-gaap true debit instant No definition available. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false true false false -14824000 -14824000 false false false xbrli:monetaryItemType monetary Amount of the reduction in the accumulated postretirement benefit obligation for the government subsidy related to prescription drug benefits attributed to past service. 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No authoritative reference available. false 277 Components of net pension cost and net other postretirement benefit cost 2 us-gaap_DefinedBenefitPensionPlansAndDefinedBenefitPostretirementPlansDisclosureAbstract us-gaap true na duration No definition available. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 278 Service cost - benefits earned during the period 2 us-gaap_DefinedBenefitPlanServiceCost us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 1163000 1163000 false false false 2 false true false false 995000 995000 false false false 3 false true false false 3489000 3489000 false false false 4 false true false false 2985000 2985000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 106 -Paragraph 518 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 87 -Paragraph 264 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph a, h false 279 Interest cost 2 us-gaap_DefinedBenefitPlanInterestCost us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 3807000 3807000 false false false 2 false true false false 3676000 3676000 false false false 3 false true false false 11421000 11421000 false false false 4 false true false false 11028000 11028000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 106 -Paragraph 518 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 87 -Paragraph 264 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph a, h false 280 Expected return on assets 2 us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets us-gaap true credit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false -4313000 -4313000 false false false 2 false true false false -4236000 -4236000 false false false 3 false true false false -12939000 -12939000 false false false 4 false true false false -12708000 -12708000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary An amount calculated as a basis for determining the extent of delayed recognition of the effects of changes in the fair value of assets. The expected return on plan assets is determined based on the expected long-term rate of return on plan assets and the market-related value of plan assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 106 -Paragraph 518 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 87 -Paragraph 264 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph h false 282 Amortization of prior service cost 2 us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 79000 79000 false false false 2 false true false false 85000 85000 false false false 3 false true false false 237000 237000 false false false 4 false true false false 255000 255000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The amount of the prior service cost or credit recognized in net periodic benefit cost relating to benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph h false 283 Amortization of loss 2 us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses us-gaap true credit duration No definition available. false false false false false false false false false false false totallabel false 1 false true false false 1091000 1091000 false false false 2 false true false false 324000 324000 false false false 3 false true false false 3273000 3273000 false false false 4 false true false false 972000 972000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The amount of gains or losses recognized in net periodic benefit cost Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph h true 284 Net pension costs/(income) and other postretirement benefit cost 2 us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost us-gaap true debit duration No definition available. false false false false false false false false false false false totallabel false 1 false true false false 1827000 1827000 false false false 2 false true false false 844000 844000 false false false 3 false true false false 5481000 5481000 false false false 4 false true false false 2532000 2532000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The total amount of net periodic benefit cost for defined benefit plans for the period. Periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain or loss, prior service cost or credit, transition asset or obligation, and gain or loss due to settlements or curtailments). Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph h true 301 Entergy Mississippi [Member] | Net Other Postretirement Benefit Cost [Member] 0 na true na na No definition available. false true false false false false false false false false false http://entergy.com/role/retirementandotherpostretirementbenefitsdetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false false 59 USD true false false false Entergy Mississippi [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi etr_RegistrantSubsidiaryThreeMember dei_LegalEntityAxis explicitMember false false Net Other Postretirement Benefit Cost [Member] us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 60 USD true false false false Entergy Mississippi [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi etr_RegistrantSubsidiaryThreeMember dei_LegalEntityAxis explicitMember false false Net Other Postretirement Benefit Cost [Member] us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 61 USD true false false false Entergy Mississippi [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi etr_RegistrantSubsidiaryThreeMember dei_LegalEntityAxis explicitMember false false Net Other Postretirement Benefit Cost [Member] us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 62 USD true false false false Entergy Mississippi [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi etr_RegistrantSubsidiaryThreeMember dei_LegalEntityAxis explicitMember false false Net Other Postretirement Benefit Cost [Member] us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 302 Components of net pension cost and net other postretirement benefit cost 2 us-gaap_DefinedBenefitPensionPlansAndDefinedBenefitPostretirementPlansDisclosureAbstract us-gaap true na duration No definition available. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 303 Service cost - benefits earned during the period 2 us-gaap_DefinedBenefitPlanServiceCost us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 550000 550000 false false false 2 false true false false 530000 530000 false false false 3 false true false false 1650000 1650000 false false false 4 false true false false 1590000 1590000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan. 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Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 106 -Paragraph 518 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 87 -Paragraph 264 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph a, h false 305 Expected return on assets 2 us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets us-gaap true credit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false -888000 -888000 false false false 2 false true false false -757000 -757000 false false false 3 false true false false -2664000 -2664000 false false false 4 false true false false -2271000 -2271000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary An amount calculated as a basis for determining the extent of delayed recognition of the effects of changes in the fair value of assets. The expected return on plan assets is determined based on the expected long-term rate of return on plan assets and the market-related value of plan assets. 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Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph h false 307 Amortization of prior service cost 2 us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false -62000 -62000 false false false 2 false true false false -62000 -62000 false false false 3 false true false false -186000 -186000 false false false 4 false true false false -186000 -186000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The amount of the prior service cost or credit recognized in net periodic benefit cost relating to benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph h false 308 Amortization of loss 2 us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses us-gaap true credit duration No definition available. false false false false false false false false false false false totallabel false 1 false true false false 476000 476000 false false false 2 false true false false 657000 657000 false false false 3 false true false false 1428000 1428000 false false false 4 false true false false 1971000 1971000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The amount of gains or losses recognized in net periodic benefit cost Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph h true 309 Net pension costs/(income) and other postretirement benefit cost 2 us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost us-gaap true debit duration No definition available. false false false false false false false false false false false totallabel false 1 false true false false 1257000 1257000 false false false 2 false true false false 1629000 1629000 false false false 3 false true false false 3771000 3771000 false false false 4 false true false false 4887000 4887000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The total amount of net periodic benefit cost for defined benefit plans for the period. Periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain or loss, prior service cost or credit, transition asset or obligation, and gain or loss due to settlements or curtailments). Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph h true 326 Entergy New Orleans [Member] 0 na true na na No definition available. false true false false false false false false false false false http://entergy.com/role/retirementandotherpostretirementbenefitsdetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false false 63 USD true false false false Entergy New Orleans [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi etr_RegistrantSubsidiaryFourMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 64 USD true false false false Entergy New Orleans [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi etr_RegistrantSubsidiaryFourMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 65 USD true false false false Entergy New Orleans [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi etr_RegistrantSubsidiaryFourMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 $ false 66 USD true false false false Entergy New Orleans [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi etr_RegistrantSubsidiaryFourMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 67 USD true false false false Entergy New Orleans [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi etr_RegistrantSubsidiaryFourMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 68 USD true false false false Entergy New Orleans [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi etr_RegistrantSubsidiaryFourMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 327 Components of net pension cost and net other postretirement benefit cost 2 us-gaap_DefinedBenefitPensionPlansAndDefinedBenefitPostretirementPlansDisclosureAbstract us-gaap true na duration No definition available. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 335 Non-qualified pension cost 2 etr_NonQualifiedPensionCost etr false debit duration Non-Qualified pension cost. false false false false false false false false false false false verboselabel false 1 false true false false 6000 6000 false false false 2 false false false false 0 0 false false false 3 false true false false 19000 19000 false false false 4 false true false false 61000 61000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary Non-Qualified pension cost. No authoritative reference available. false 336 Settlement charge recognized included in cost above 2 etr_SettlementChargeRecognizedIncludedInNonQualifiedPensionCost etr false debit duration Settlement Charge Recognized included in Non qualified Pension Cost. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false true false false 21000 21000 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary Settlement Charge Recognized included in Non qualified Pension Cost. No authoritative reference available. false 337 Employer Contributions 2 etr_EmployerContributionsAbstract etr false na duration Employer Contributions. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:stringItemType string Employer Contributions. false 338 Pension contributions made through October 2010 2 us-gaap_DefinedBenefitPlanContributionsByEmployer us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false true false false 6961000 6961000 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The amount of contributions made by the employer. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph b false 339 Estimated effect of future Medicare subsidies APBO and other postretirement benefit cost 2 etr_EstimatedEffectOfFutureMedicareSubsidiesApboAndOtherPostretirementBenefitCostAbstract etr false na duration Estimated effect of future Medicare subsidies APBO and other postretirement benefit cost. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:stringItemType string Estimated effect of future Medicare subsidies APBO and other postretirement benefit cost. false 340 Reduction in Accumulated Postretirement Benefit Obligation (APBO) 2 us-gaap_PrescriptionDrugBenefitReductionInAccumulatedPostretirementBenefitObligationForSubsidy us-gaap true debit instant No definition available. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false true false false -9798000 -9798000 false false false xbrli:monetaryItemType monetary Amount of the reduction in the accumulated postretirement benefit obligation for the government subsidy related to prescription drug benefits attributed to past service. Disclosure relates to the first period in which an employer includes the effects of the subsidy in measuring the accumulated postretirement benefit obligation and net periodic postretirement benefit cost. 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No authoritative reference available. false 342 Medicare subsidies received 2 etr_MedicareSubsidiesForPrescriptionDrugClaimsReceived etr false credit duration Medicare subsidies for prescription drug claims received. false false false false false false false false false false false terselabel false 1 false true false false 179000 179000 false false false 2 false false false false 0 0 false false false 3 false true false false 316000 316000 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary Medicare subsidies for prescription drug claims received. No authoritative reference available. false 343 Retirement and Other Postretirement Benefits (Textuals) [Abstract] 2 etr_RetirementAndOtherPostretirementBenefitsTextualsAbstract etr false na duration Retirement and Other Postretirement Benefits. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:stringItemType string Retirement and Other Postretirement Benefits. false 348 Reduction in Accumulated Postretirement Benefit Obligation (APBO) 2 us-gaap_PrescriptionDrugBenefitReductionInAccumulatedPostretirementBenefitObligationForSubsidy us-gaap true debit instant No definition available. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false true false false -9798000 -9798000 false false false xbrli:monetaryItemType monetary Amount of the reduction in the accumulated postretirement benefit obligation for the government subsidy related to prescription drug benefits attributed to past service. Disclosure relates to the first period in which an employer includes the effects of the subsidy in measuring the accumulated postretirement benefit obligation and net periodic postretirement benefit cost. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS106-2 -Paragraph 21 -Subparagraph a false 349 Reduction in other postretirement benefit cost 2 etr_ReductionInOtherPostretirementBenefitCost etr false debit duration Reduction in other postretirement benefit cost. false false false false false false false false false false false verboselabel false 1 false true false false -268000 -268000 false false false 2 false true false false -261000 -261000 false false false 3 false true false false -804000 -804000 false false false 4 false true false false -783000 -783000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary Reduction in other postretirement benefit cost. No authoritative reference available. false 350 Medicare subsidies for prescription drug claims received 2 etr_MedicareSubsidiesForPrescriptionDrugClaimsReceived etr false credit duration Medicare subsidies for prescription drug claims received. false false false false false false false false false false false verboselabel false 1 false true false false 179000 179000 false false false 2 false false false false 0 0 false false false 3 false true false false 316000 316000 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary Medicare subsidies for prescription drug claims received. No authoritative reference available. false 351 Entergy New Orleans [Member] | Net Pension Cost [Member] 0 na true na na No definition available. false true false false false false false false false false false http://entergy.com/role/retirementandotherpostretirementbenefitsdetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false false 69 USD true false false false Entergy New Orleans [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi etr_RegistrantSubsidiaryFourMember dei_LegalEntityAxis explicitMember false false Net Pension Cost [Member] us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_PensionPlansDefinedBenefitMember us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 70 USD true false false false Entergy New Orleans [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi etr_RegistrantSubsidiaryFourMember dei_LegalEntityAxis explicitMember false false Net Pension Cost [Member] us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_PensionPlansDefinedBenefitMember us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 71 USD true false false false Entergy New Orleans [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi etr_RegistrantSubsidiaryFourMember dei_LegalEntityAxis explicitMember false false Net Pension Cost [Member] us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_PensionPlansDefinedBenefitMember us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 72 USD true false false false Entergy New Orleans [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi etr_RegistrantSubsidiaryFourMember dei_LegalEntityAxis explicitMember false false Net Pension Cost [Member] us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_PensionPlansDefinedBenefitMember us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 352 Components of net pension cost and net other postretirement benefit cost 2 us-gaap_DefinedBenefitPensionPlansAndDefinedBenefitPostretirementPlansDisclosureAbstract us-gaap true na duration No definition available. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 353 Service cost - benefits earned during the period 2 us-gaap_DefinedBenefitPlanServiceCost us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 516000 516000 false false false 2 false true false false 425000 425000 false false false 3 false true false false 1548000 1548000 false false false 4 false true false false 1275000 1275000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 106 -Paragraph 518 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 87 -Paragraph 264 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph a, h false 354 Interest cost 2 us-gaap_DefinedBenefitPlanInterestCost us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 1510000 1510000 false false false 2 false true false false 1470000 1470000 false false false 3 false true false false 4530000 4530000 false false false 4 false true false false 4410000 4410000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 106 -Paragraph 518 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 87 -Paragraph 264 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph a, h false 355 Expected return on assets 2 us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets us-gaap true credit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false -1809000 -1809000 false false false 2 false true false false -1815000 -1815000 false false false 3 false true false false -5427000 -5427000 false false false 4 false true false false -5445000 -5445000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary An amount calculated as a basis for determining the extent of delayed recognition of the effects of changes in the fair value of assets. The expected return on plan assets is determined based on the expected long-term rate of return on plan assets and the market-related value of plan assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 106 -Paragraph 518 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 87 -Paragraph 264 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph h false 357 Amortization of prior service cost 2 us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 44000 44000 false false false 2 false true false false 52000 52000 false false false 3 false true false false 132000 132000 false false false 4 false true false false 156000 156000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The amount of the prior service cost or credit recognized in net periodic benefit cost relating to benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph h false 358 Amortization of loss 2 us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses us-gaap true credit duration No definition available. false false false false false false false false false false false totallabel false 1 false true false false 636000 636000 false false false 2 false true false false 305000 305000 false false false 3 false true false false 1908000 1908000 false false false 4 false true false false 915000 915000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The amount of gains or losses recognized in net periodic benefit cost Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph h true 359 Net pension costs/(income) and other postretirement benefit cost 2 us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost us-gaap true debit duration No definition available. false false false false false false false false false false false totallabel false 1 false true false false 897000 897000 false false false 2 false true false false 437000 437000 false false false 3 false true false false 2691000 2691000 false false false 4 false true false false 1311000 1311000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The total amount of net periodic benefit cost for defined benefit plans for the period. Periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain or loss, prior service cost or credit, transition asset or obligation, and gain or loss due to settlements or curtailments). Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph h true 376 Entergy New Orleans [Member] | Net Other Postretirement Benefit Cost [Member] 0 na true na na No definition available. false true false false false false false false false false false http://entergy.com/role/retirementandotherpostretirementbenefitsdetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false false 73 USD true false false false Entergy New Orleans [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi etr_RegistrantSubsidiaryFourMember dei_LegalEntityAxis explicitMember false false Net Other Postretirement Benefit Cost [Member] us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 74 USD true false false false Entergy New Orleans [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi etr_RegistrantSubsidiaryFourMember dei_LegalEntityAxis explicitMember false false Net Other Postretirement Benefit Cost [Member] us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 75 USD true false false false Entergy New Orleans [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi etr_RegistrantSubsidiaryFourMember dei_LegalEntityAxis explicitMember false false Net Other Postretirement Benefit Cost [Member] us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 76 USD true false false false Entergy New Orleans [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi etr_RegistrantSubsidiaryFourMember dei_LegalEntityAxis explicitMember false false Net Other Postretirement Benefit Cost [Member] us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 377 Components of net pension cost and net other postretirement benefit cost 2 us-gaap_DefinedBenefitPensionPlansAndDefinedBenefitPostretirementPlansDisclosureAbstract us-gaap true na duration No definition available. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 378 Service cost - benefits earned during the period 2 us-gaap_DefinedBenefitPlanServiceCost us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 347000 347000 false false false 2 false true false false 311000 311000 false false false 3 false true false false 1041000 1041000 false false false 4 false true false false 933000 933000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 106 -Paragraph 518 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 87 -Paragraph 264 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph a, h false 379 Interest cost 2 us-gaap_DefinedBenefitPlanInterestCost us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 900000 900000 false false false 2 false true false false 967000 967000 false false false 3 false true false false 2700000 2700000 false false false 4 false true false false 2901000 2901000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 106 -Paragraph 518 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 87 -Paragraph 264 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph a, h false 380 Expected return on assets 2 us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets us-gaap true credit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false -725000 -725000 false false false 2 false true false false -684000 -684000 false false false 3 false true false false -2175000 -2175000 false false false 4 false true false false -2052000 -2052000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary An amount calculated as a basis for determining the extent of delayed recognition of the effects of changes in the fair value of assets. The expected return on plan assets is determined based on the expected long-term rate of return on plan assets and the market-related value of plan assets. 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Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph h false 382 Amortization of prior service cost 2 us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 90000 90000 false false false 2 false true false false 90000 90000 false false false 3 false true false false 270000 270000 false false false 4 false true false false 270000 270000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The amount of the prior service cost or credit recognized in net periodic benefit cost relating to benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph h false 383 Amortization of loss 2 us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses us-gaap true credit duration No definition available. false false false false false false false false false false false totallabel false 1 false true false false 274000 274000 false false false 2 false true false false 381000 381000 false false false 3 false true false false 822000 822000 false false false 4 false true false false 1143000 1143000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The amount of gains or losses recognized in net periodic benefit cost Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph h true 384 Net pension costs/(income) and other postretirement benefit cost 2 us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost us-gaap true debit duration No definition available. false false false false false false false false false false false totallabel false 1 false true false false 1301000 1301000 false false false 2 false true false false 1481000 1481000 false false false 3 false true false false 3903000 3903000 false false false 4 false true false false 4443000 4443000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The total amount of net periodic benefit cost for defined benefit plans for the period. Periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain or loss, prior service cost or credit, transition asset or obligation, and gain or loss due to settlements or curtailments). Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph h true 401 Entergy Texas [Member] 0 na true na na No definition available. false true false false false false false false false false false http://entergy.com/role/retirementandotherpostretirementbenefitsdetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false false 77 USD true false false false Entergy Texas [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi etr_RegistrantSubsidiaryFiveMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 78 USD true false false false Entergy Texas [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi etr_RegistrantSubsidiaryFiveMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 79 USD true false false false Entergy Texas [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi etr_RegistrantSubsidiaryFiveMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 $ false 80 USD true false false false Entergy Texas [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi etr_RegistrantSubsidiaryFiveMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 81 USD true false false false Entergy Texas [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi etr_RegistrantSubsidiaryFiveMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 82 USD true false false false Entergy Texas [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi etr_RegistrantSubsidiaryFiveMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 402 Components of net pension cost and net other postretirement benefit cost 2 us-gaap_DefinedBenefitPensionPlansAndDefinedBenefitPostretirementPlansDisclosureAbstract us-gaap true na duration No definition available. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 410 Non-qualified pension cost 2 etr_NonQualifiedPensionCost etr false debit duration Non-Qualified pension cost. false false false false false false false false false false false verboselabel false 1 false true false false 169000 169000 false false false 2 false false false false 0 0 false false false 3 false true false false 515000 515000 false false false 4 false true false false 556000 556000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary Non-Qualified pension cost. 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No authoritative reference available. false 412 Employer Contributions 2 etr_EmployerContributionsAbstract etr false na duration Employer Contributions. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:stringItemType string Employer Contributions. false 413 Pension contributions made through October 2010 2 us-gaap_DefinedBenefitPlanContributionsByEmployer us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false true false false 10635000 10635000 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The amount of contributions made by the employer. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph b false 414 Estimated effect of future Medicare subsidies APBO and other postretirement benefit cost 2 etr_EstimatedEffectOfFutureMedicareSubsidiesApboAndOtherPostretirementBenefitCostAbstract etr false na duration Estimated effect of future Medicare subsidies APBO and other postretirement benefit cost. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:stringItemType string Estimated effect of future Medicare subsidies APBO and other postretirement benefit cost. false 415 Reduction in Accumulated Postretirement Benefit Obligation (APBO) 2 us-gaap_PrescriptionDrugBenefitReductionInAccumulatedPostretirementBenefitObligationForSubsidy us-gaap true debit instant No definition available. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false true false false -16652000 -16652000 false false false xbrli:monetaryItemType monetary Amount of the reduction in the accumulated postretirement benefit obligation for the government subsidy related to prescription drug benefits attributed to past service. Disclosure relates to the first period in which an employer includes the effects of the subsidy in measuring the accumulated postretirement benefit obligation and net periodic postretirement benefit cost. 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No authoritative reference available. false 417 Medicare subsidies received 2 etr_MedicareSubsidiesForPrescriptionDrugClaimsReceived etr false credit duration Medicare subsidies for prescription drug claims received. false false false false false false false false false false false terselabel false 1 false true false false 254000 254000 false false false 2 false false false false 0 0 false false false 3 false true false false 456000 456000 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary Medicare subsidies for prescription drug claims received. No authoritative reference available. false 418 Retirement and Other Postretirement Benefits (Textuals) [Abstract] 2 etr_RetirementAndOtherPostretirementBenefitsTextualsAbstract etr false na duration Retirement and Other Postretirement Benefits. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:stringItemType string Retirement and Other Postretirement Benefits. false 423 Reduction in Accumulated Postretirement Benefit Obligation (APBO) 2 us-gaap_PrescriptionDrugBenefitReductionInAccumulatedPostretirementBenefitObligationForSubsidy us-gaap true debit instant No definition available. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false true false false -16652000 -16652000 false false false xbrli:monetaryItemType monetary Amount of the reduction in the accumulated postretirement benefit obligation for the government subsidy related to prescription drug benefits attributed to past service. Disclosure relates to the first period in which an employer includes the effects of the subsidy in measuring the accumulated postretirement benefit obligation and net periodic postretirement benefit cost. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS106-2 -Paragraph 21 -Subparagraph a false 424 Reduction in other postretirement benefit cost 2 etr_ReductionInOtherPostretirementBenefitCost etr false debit duration Reduction in other postretirement benefit cost. false false false false false false false false false false false verboselabel false 1 false true false false -277000 -277000 false false false 2 false true false false -240000 -240000 false false false 3 false true false false -831000 -831000 false false false 4 false true false false -720000 -720000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary Reduction in other postretirement benefit cost. No authoritative reference available. false 425 Medicare subsidies for prescription drug claims received 2 etr_MedicareSubsidiesForPrescriptionDrugClaimsReceived etr false credit duration Medicare subsidies for prescription drug claims received. false false false false false false false false false false false verboselabel false 1 false true false false 254000 254000 false false false 2 false false false false 0 0 false false false 3 false true false false 456000 456000 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary Medicare subsidies for prescription drug claims received. No authoritative reference available. false 426 Entergy Texas [Member] | Net Pension Cost [Member] 0 na true na na No definition available. false true false false false false false false false false false http://entergy.com/role/retirementandotherpostretirementbenefitsdetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false false 83 USD true false false false Entergy Texas [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi etr_RegistrantSubsidiaryFiveMember dei_LegalEntityAxis explicitMember false false Net Pension Cost [Member] us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_PensionPlansDefinedBenefitMember us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 84 USD true false false false Entergy Texas [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi etr_RegistrantSubsidiaryFiveMember dei_LegalEntityAxis explicitMember false false Net Pension Cost [Member] us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_PensionPlansDefinedBenefitMember us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 85 USD true false false false Entergy Texas [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi etr_RegistrantSubsidiaryFiveMember dei_LegalEntityAxis explicitMember false false Net Pension Cost [Member] us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_PensionPlansDefinedBenefitMember us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 86 USD true false false false Entergy Texas [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi etr_RegistrantSubsidiaryFiveMember dei_LegalEntityAxis explicitMember false false Net Pension Cost [Member] us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_PensionPlansDefinedBenefitMember us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. 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The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan. 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Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 106 -Paragraph 518 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 87 -Paragraph 264 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph a, h false 430 Expected return on assets 2 us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets us-gaap true credit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false -5137000 -5137000 false false false 2 false true false false -5185000 -5185000 false false false 3 false true false false -15411000 -15411000 false false false 4 false true false false -15555000 -15555000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary An amount calculated as a basis for determining the extent of delayed recognition of the effects of changes in the fair value of assets. The expected return on plan assets is determined based on the expected long-term rate of return on plan assets and the market-related value of plan assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 106 -Paragraph 518 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 87 -Paragraph 264 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph h false 432 Amortization of prior service cost 2 us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 59000 59000 false false false 2 false true false false 80000 80000 false false false 3 false true false false 177000 177000 false false false 4 false true false false 240000 240000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The amount of the prior service cost or credit recognized in net periodic benefit cost relating to benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation. 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Periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain or loss, prior service cost or credit, transition asset or obligation, and gain or loss due to settlements or curtailments). 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The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan. 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The expected return on plan assets is determined based on the expected long-term rate of return on plan assets and the market-related value of plan assets. 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Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph h false 458 Amortization of loss 2 us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses us-gaap true credit duration No definition available. false false false false false false false false false false false totallabel false 1 false true false false 752000 752000 false false false 2 false true false false 799000 799000 false false false 3 false true false false 2256000 2256000 false false false 4 false true false false 2397000 2397000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The amount of gains or losses recognized in net periodic benefit cost Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph h true 459 Net pension costs/(income) and other postretirement benefit cost 2 us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost us-gaap true debit duration No definition available. false false false false false false false false false false false totallabel false 1 false true false false 1398000 1398000 false false false 2 false true false false 1437000 1437000 false false false 3 false true false false 4194000 4194000 false false false 4 false true false false 4311000 4311000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The total amount of net periodic benefit cost for defined benefit plans for the period. 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Disclosure relates to the first period in which an employer includes the effects of the subsidy in measuring the accumulated postretirement benefit obligation and net periodic postretirement benefit cost. 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The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan. 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The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan. 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Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 106 -Paragraph 518 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 87 -Paragraph 264 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph a, h false 555 Expected return on assets 2 us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets us-gaap true credit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false -64902000 -64902000 false false false 2 false true false false -62305000 -62305000 false false false 3 false true false false -194706000 -194706000 false false false 4 false true false false -186915000 -186915000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary An amount calculated as a basis for determining the extent of delayed recognition of the effects of changes in the fair value of assets. The expected return on plan assets is determined based on the expected long-term rate of return on plan assets and the market-related value of plan assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 106 -Paragraph 518 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 87 -Paragraph 264 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph h false 557 Amortization of prior service cost 2 us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 1164000 1164000 false false false 2 false true false false 1249000 1249000 false false false 3 false true false false 3492000 3492000 false false false 4 false true false false 3747000 3747000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The amount of the prior service cost or credit recognized in net periodic benefit cost relating to benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph h false 558 Amortization of loss 2 us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses us-gaap true credit duration No definition available. false false false false false false false false false false false totallabel false 1 false true false false 16475000 16475000 false false false 2 false true false false 5600000 5600000 false false false 3 false true false false 49425000 49425000 false false false 4 false true false false 16800000 16800000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The amount of gains or losses recognized in net periodic benefit cost Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph h true 559 Net pension costs/(income) and other postretirement benefit cost 2 us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost us-gaap true debit duration No definition available. false false false false false false false false false false false totallabel false 1 false true false false 36778000 36778000 false false false 2 false true false false 21499000 21499000 false false false 3 false true false false 110334000 110334000 false false false 4 false true false false 64497000 64497000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The total amount of net periodic benefit cost for defined benefit plans for the period. Periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain or loss, prior service cost or credit, transition asset or obligation, and gain or loss due to settlements or curtailments). Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph h true 576 Net Other Postretirement Benefit Cost [Member] 0 na true na na No definition available. false true false false false false false false false false false http://entergy.com/role/retirementandotherpostretirementbenefitsdetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false false 109 USD true false false false Net Other Postretirement Benefit Cost [Member] us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 110 USD true false false false Net Other Postretirement Benefit Cost [Member] us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 111 USD true false false false Net Other Postretirement Benefit Cost [Member] us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 112 USD true false false false Net Other Postretirement Benefit Cost [Member] us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 577 Components of net pension cost and net other postretirement benefit cost 2 us-gaap_DefinedBenefitPensionPlansAndDefinedBenefitPostretirementPlansDisclosureAbstract us-gaap true na duration No definition available. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 578 Service cost - benefits earned during the period 2 us-gaap_DefinedBenefitPlanServiceCost us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 13078000 13078000 false false false 2 false true false false 11691000 11691000 false false false 3 false true false false 39234000 39234000 false false false 4 false true false false 35073000 35073000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 106 -Paragraph 518 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 87 -Paragraph 264 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph a, h false 579 Interest cost 2 us-gaap_DefinedBenefitPlanInterestCost us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 19020000 19020000 false false false 2 false true false false 18816000 18816000 false false false 3 false true false false 57060000 57060000 false false false 4 false true false false 56448000 56448000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 106 -Paragraph 518 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 87 -Paragraph 264 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph a, h false 580 Expected return on assets 2 us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets us-gaap true credit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false -6553000 -6553000 false false false 2 false true false false -5871000 -5871000 false false false 3 false true false false -19659000 -19659000 false false false 4 false true false false -17613000 -17613000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary An amount calculated as a basis for determining the extent of delayed recognition of the effects of changes in the fair value of assets. The expected return on plan assets is determined based on the expected long-term rate of return on plan assets and the market-related value of plan assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 106 -Paragraph 518 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 87 -Paragraph 264 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph h false 581 Amortization of transition obligation 2 us-gaap_DefinedBenefitPlanAmortizationOfTransitionObligationsAssets us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 932000 932000 false false false 2 false true false false 933000 933000 false false false 3 false true false false 2796000 2796000 false false false 4 false true false false 2799000 2799000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The amount of the transition obligation or asset recognized in net periodic benefit cost. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph h false 582 Amortization of prior service cost 2 us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false -3015000 -3015000 false false false 2 false true false false -4024000 -4024000 false false false 3 false true false false -9045000 -9045000 false false false 4 false true false false -12072000 -12072000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The amount of the prior service cost or credit recognized in net periodic benefit cost relating to benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph h false 583 Amortization of loss 2 us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses us-gaap true credit duration No definition available. false false false false false false false false false false false totallabel false 1 false true false false 4317000 4317000 false false false 2 false true false false 4743000 4743000 false false false 3 false true false false 12951000 12951000 false false false 4 false true false false 14229000 14229000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The amount of gains or losses recognized in net periodic benefit cost Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph h true 584 Net pension costs/(income) and other postretirement benefit cost 2 us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost us-gaap true debit duration No definition available. false false false false false false false false false false false totallabel false 1 true true false false 27779000 27779000 false false false 2 true true false false 26288000 26288000 false false false 3 true true false false 83337000 83337000 false false false 4 true true false false 78864000 78864000 false false false 5 false false false false 0 0 false false false 6 false false false false 0 0 false false false xbrli:monetaryItemType monetary The total amount of net periodic benefit cost for defined benefit plans for the period. Periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain or loss, prior service cost or credit, transition asset or obligation, and gain or loss due to settlements or curtailments). Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph h true 1 Net of tax expense (benefit) of $2,236, ($255), respectively 6 243 false NoRounding UnKnown UnKnown false true