XML 92 R4.htm IDEA: XBRL DOCUMENT v2.4.1.9
Consolidated Balance Sheets (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Cash and cash equivalents:    
Cash $ 67,120us-gaap_Cash $ 131,327us-gaap_Cash
Temporary cash investments 1,113,426us-gaap_CashEquivalentsAtCarryingValue 1,290,699us-gaap_CashEquivalentsAtCarryingValue
Total cash and cash equivalents 1,180,546us-gaap_CashAndCashEquivalentsAtCarryingValue 1,422,026us-gaap_CashAndCashEquivalentsAtCarryingValue
Accounts receivable:    
Customer 638,721us-gaap_AccountsReceivableGrossCurrent 596,917us-gaap_AccountsReceivableGrossCurrent
Allowance for doubtful accounts (35,884)us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent (35,663)us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Other 174,030us-gaap_OtherReceivables 220,342us-gaap_OtherReceivables
Accrued unbilled revenues 291,040etr_AccruedUnbilledRevenues 321,659etr_AccruedUnbilledRevenues
Total accounts receivable 1,067,907us-gaap_AccountsReceivableNetCurrent 1,103,255us-gaap_AccountsReceivableNetCurrent
Deferred fuel costs 127,742us-gaap_DeferredFuelCost 155,140us-gaap_DeferredFuelCost
Accumulated deferred income taxes 22,953us-gaap_DeferredTaxAssetsNetCurrent 27,783us-gaap_DeferredTaxAssetsNetCurrent
Fuel inventory - at average cost 227,986etr_FuelInventoryAtAverageCost 205,434etr_FuelInventoryAtAverageCost
Materials and supplies - at average cost 929,843us-gaap_OtherInventorySupplies 918,584us-gaap_OtherInventorySupplies
Deferred nuclear refueling outage costs 278,900etr_DeferredNuclearRefuelingOutageCosts 214,188etr_DeferredNuclearRefuelingOutageCosts
Prepayments and other 304,108us-gaap_OtherAssetsCurrent 343,223us-gaap_OtherAssetsCurrent
TOTAL 4,139,985us-gaap_AssetsCurrent 4,389,633us-gaap_AssetsCurrent
OTHER PROPERTY AND INVESTMENTS    
Investment in affiliates - at equity 34,864us-gaap_EquityMethodInvestments 36,234us-gaap_EquityMethodInvestments
Decommissioning trust funds 5,452,950us-gaap_DecommissioningFundInvestments 5,370,932us-gaap_DecommissioningFundInvestments
Non-utility property - at cost (less accumulated depreciation) 218,235us-gaap_PropertyPlantAndEquipmentNet 213,791us-gaap_PropertyPlantAndEquipmentNet
Other 407,639us-gaap_OtherLongTermInvestments 405,169us-gaap_OtherLongTermInvestments
TOTAL 6,113,688us-gaap_LongTermInvestments 6,026,126us-gaap_LongTermInvestments
PROPERTY, PLANT, AND EQUIPMENT    
Electric 45,233,667us-gaap_PublicUtilitiesPropertyPlantAndEquipmentOtherPropertyPlantAndEquipment 44,881,419us-gaap_PublicUtilitiesPropertyPlantAndEquipmentOtherPropertyPlantAndEquipment
Property under capital lease 945,454us-gaap_CapitalLeasedAssetsGross 945,784us-gaap_CapitalLeasedAssetsGross
Natural gas 379,949etr_NaturalGas 377,565etr_NaturalGas
Construction work in progress 1,387,574us-gaap_PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress 1,425,981us-gaap_PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress
Nuclear fuel 1,523,612us-gaap_NuclearFuelNetOfAmortization 1,542,055us-gaap_NuclearFuelNetOfAmortization
TOTAL PROPERTY, PLANT, AND EQUIPMENT 49,470,256us-gaap_PublicUtilitiesPropertyPlantAndEquipmentPlantInService 49,172,804us-gaap_PublicUtilitiesPropertyPlantAndEquipmentPlantInService
Less - accumulated depreciation and amortization 20,662,229us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation 20,449,858us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation
PROPERTY, PLANT, AND EQUIPMENT - NET 28,808,027us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet 28,722,946us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet
Regulatory assets:    
Regulatory asset for income taxes - net 803,744etr_SfasRegulatoryAssetNet 836,064etr_SfasRegulatoryAssetNet
Other regulatory assets 4,877,838etr_OtherRegulatoryAssets 4,968,553etr_OtherRegulatoryAssets
Deferred fuel costs 238,706etr_DeferredFuelCosts 238,102etr_DeferredFuelCosts
Goodwill 377,172us-gaap_Goodwill 377,172us-gaap_Goodwill
Accumulated deferred income taxes 53,135us-gaap_DeferredTaxAssetsNetNoncurrent 48,351us-gaap_DeferredTaxAssetsNetNoncurrent
Other 965,238us-gaap_OtherAssetsNoncurrent 920,907us-gaap_OtherAssetsNoncurrent
TOTAL 7,315,833us-gaap_AssetsNoncurrent 7,389,149us-gaap_AssetsNoncurrent
TOTAL ASSETS 46,377,533us-gaap_Assets 46,527,854us-gaap_Assets
CURRENT LIABILITIES    
Currently maturing long-term debt 896,877us-gaap_LongTermDebtCurrent 899,375us-gaap_LongTermDebtCurrent
Notes payable and commercial paper 808,419us-gaap_ShortTermBankLoansAndNotesPayable 598,407us-gaap_ShortTermBankLoansAndNotesPayable
Accounts payable 941,596us-gaap_AccountsPayableCurrent 1,166,431us-gaap_AccountsPayableCurrent
Customer deposits 415,195us-gaap_CustomerDepositsCurrent 412,166us-gaap_CustomerDepositsCurrent
Taxes accrued 60,167us-gaap_TaxesPayableCurrent 128,108us-gaap_TaxesPayableCurrent
Accumulated deferred income taxes 94,719us-gaap_DeferredTaxLiabilitiesCurrent 38,039us-gaap_DeferredTaxLiabilitiesCurrent
Interest accrued 163,459us-gaap_InterestPayableCurrent 206,010us-gaap_InterestPayableCurrent
Deferred fuel costs 146,078etr_DeferredFuelCostsCurrentLiabilities 91,602etr_DeferredFuelCostsCurrentLiabilities
Obligations under capital leases 2,557us-gaap_CapitalLeaseObligationsCurrent 2,508us-gaap_CapitalLeaseObligationsCurrent
Pension and other postretirement liabilities 58,786us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities 57,994us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities
Other 177,572us-gaap_OtherLiabilitiesCurrent 248,251us-gaap_OtherLiabilitiesCurrent
TOTAL 3,765,425us-gaap_LiabilitiesCurrent 3,848,891us-gaap_LiabilitiesCurrent
NON-CURRENT LIABILITIES    
Accumulated deferred income taxes and taxes accrued 9,158,586us-gaap_DeferredTaxLiabilitiesNoncurrent 9,133,161us-gaap_DeferredTaxLiabilitiesNoncurrent
Accumulated deferred investment tax credits 251,616us-gaap_AccumulatedDeferredInvestmentTaxCredit 247,521us-gaap_AccumulatedDeferredInvestmentTaxCredit
Obligations under capital leases 29,051us-gaap_CapitalLeaseObligationsNoncurrent 29,710us-gaap_CapitalLeaseObligationsNoncurrent
Other regulatory liabilities 1,369,514us-gaap_RegulatoryLiabilityNoncurrent 1,383,609us-gaap_RegulatoryLiabilityNoncurrent
Decommissioning and asset retirement cost liabilities 4,513,168us-gaap_AssetRetirementObligationsNoncurrent 4,458,296us-gaap_AssetRetirementObligationsNoncurrent
Accumulated provisions 419,471us-gaap_AccruedLiabilitiesCurrent 418,128us-gaap_AccruedLiabilitiesCurrent
Pension and other postretirement liabilities 3,584,994us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent 3,638,295us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent
Long-term debt 12,307,540us-gaap_LongTermDebtNoncurrent 12,500,109us-gaap_LongTermDebtNoncurrent
Other 539,429us-gaap_OtherLiabilitiesNoncurrent 557,649us-gaap_OtherLiabilitiesNoncurrent
TOTAL 32,173,369us-gaap_LiabilitiesNoncurrent 32,366,478us-gaap_LiabilitiesNoncurrent
Subsidiaries' preferred stock without sinking fund 210,760us-gaap_TemporaryEquityCarryingAmountAttributableToParent 210,760us-gaap_TemporaryEquityCarryingAmountAttributableToParent
Common Shareholders' Equity:    
Common stock 2,548us-gaap_CommonStockValue 2,548us-gaap_CommonStockValue
Paid-in capital 5,351,690us-gaap_AdditionalPaidInCapital 5,375,353us-gaap_AdditionalPaidInCapital
Retained earnings 10,318,450us-gaap_RetainedEarningsAccumulatedDeficit 10,169,657us-gaap_RetainedEarningsAccumulatedDeficit
Accumulated other comprehensive loss (59,737)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax (42,307)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
Less - treasury stock, at cost 5,478,972us-gaap_TreasuryStockValue 5,497,526us-gaap_TreasuryStockValue
Total common shareholders' equity 10,133,979us-gaap_StockholdersEquity 10,007,725us-gaap_StockholdersEquity
Subsidiaries' preferred stock without sinking fund 94,000us-gaap_MinorityInterest 94,000us-gaap_MinorityInterest
TOTAL 10,227,979us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest 10,101,725us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
TOTAL LIABILITIES AND EQUITY 46,377,533us-gaap_LiabilitiesAndStockholdersEquity 46,527,854us-gaap_LiabilitiesAndStockholdersEquity
Entergy Arkansas [Member]    
Cash and cash equivalents:    
Cash 7,153us-gaap_Cash
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
10,526us-gaap_Cash
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
Temporary cash investments 112,337us-gaap_CashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
207,979us-gaap_CashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
Total cash and cash equivalents 119,490us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
218,505us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
Securitization recovery trust account 8,069us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
4,096us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
Accounts receivable:    
Customer 128,873us-gaap_AccountsReceivableGrossCurrent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
97,314us-gaap_AccountsReceivableGrossCurrent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
Allowance for doubtful accounts (32,312)us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
(32,247)us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
Associated companies 54,127us-gaap_AccountsReceivableRelatedPartiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
32,187us-gaap_AccountsReceivableRelatedPartiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
Other 97,213us-gaap_OtherReceivables
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
110,269us-gaap_OtherReceivables
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
Accrued unbilled revenues 61,413etr_AccruedUnbilledRevenues
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
80,704etr_AccruedUnbilledRevenues
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
Total accounts receivable 309,314us-gaap_AccountsReceivableNetCurrent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
288,227us-gaap_AccountsReceivableNetCurrent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
Deferred fuel costs 127,742us-gaap_DeferredFuelCost
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
143,279us-gaap_DeferredFuelCost
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
Accumulated deferred income taxes 28,054us-gaap_DeferredTaxAssetsNetCurrent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
21,533us-gaap_DeferredTaxAssetsNetCurrent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
Fuel inventory - at average cost 59,130etr_FuelInventoryAtAverageCost
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
50,898etr_FuelInventoryAtAverageCost
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
Materials and supplies - at average cost 170,295us-gaap_OtherInventorySupplies
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
162,792us-gaap_OtherInventorySupplies
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
Deferred nuclear refueling outage costs 53,382etr_DeferredNuclearRefuelingOutageCosts
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
29,690etr_DeferredNuclearRefuelingOutageCosts
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
Prepayments and other 8,969us-gaap_OtherAssetsCurrent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
9,588us-gaap_OtherAssetsCurrent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
TOTAL 884,445us-gaap_AssetsCurrent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
928,608us-gaap_AssetsCurrent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
OTHER PROPERTY AND INVESTMENTS    
Decommissioning trust funds 783,113us-gaap_DecommissioningFundInvestments
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
769,883us-gaap_DecommissioningFundInvestments
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
Other 12,844us-gaap_OtherLongTermInvestments
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
14,170us-gaap_OtherLongTermInvestments
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
TOTAL 795,957us-gaap_LongTermInvestments
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
784,053us-gaap_LongTermInvestments
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
PROPERTY, PLANT, AND EQUIPMENT    
Electric 9,256,116us-gaap_PublicUtilitiesPropertyPlantAndEquipmentOtherPropertyPlantAndEquipment
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
9,139,181us-gaap_PublicUtilitiesPropertyPlantAndEquipmentOtherPropertyPlantAndEquipment
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
Property under capital lease 933us-gaap_CapitalLeasedAssetsGross
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
961us-gaap_CapitalLeasedAssetsGross
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
Construction work in progress 272,789us-gaap_PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
284,322us-gaap_PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
Nuclear fuel 264,240us-gaap_NuclearFuelNetOfAmortization
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
293,695us-gaap_NuclearFuelNetOfAmortization
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
TOTAL PROPERTY, PLANT, AND EQUIPMENT 9,794,078us-gaap_PublicUtilitiesPropertyPlantAndEquipmentPlantInService
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
9,718,159us-gaap_PublicUtilitiesPropertyPlantAndEquipmentPlantInService
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
Less - accumulated depreciation and amortization 4,235,279us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
4,191,959us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
PROPERTY, PLANT, AND EQUIPMENT - NET 5,558,799us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
5,526,200us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
Regulatory assets:    
Regulatory asset for income taxes - net 63,503etr_SfasRegulatoryAssetNet
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
64,214etr_SfasRegulatoryAssetNet
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
Other regulatory assets 1,362,402etr_OtherRegulatoryAssets
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
1,391,276etr_OtherRegulatoryAssets
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
Deferred fuel costs 66,504etr_DeferredFuelCosts
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
65,900etr_DeferredFuelCosts
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
Other 51,895us-gaap_OtherAssetsNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
47,674us-gaap_OtherAssetsNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
TOTAL 1,544,304us-gaap_AssetsNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
1,569,064us-gaap_AssetsNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
TOTAL ASSETS 8,783,505us-gaap_Assets
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
8,807,925us-gaap_Assets
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
CURRENT LIABILITIES    
Short-term borrowings 19,506us-gaap_ShortTermBorrowings
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
47,968us-gaap_ShortTermBorrowings
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
Associated companies accounts payable 42,648us-gaap_AccountsPayableRelatedPartiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
56,078us-gaap_AccountsPayableRelatedPartiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
Other 159,510us-gaap_AccountsPayableOtherCurrent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
174,998us-gaap_AccountsPayableOtherCurrent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
Customer deposits 115,976us-gaap_CustomerDepositsCurrent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
115,647us-gaap_CustomerDepositsCurrent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
Taxes accrued 5,317us-gaap_TaxesPayableCurrent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
24,240us-gaap_TaxesPayableCurrent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
Accumulated deferred income taxes 12,178us-gaap_DeferredTaxLiabilitiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
15,009us-gaap_DeferredTaxLiabilitiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
Interest accrued 24,588us-gaap_InterestPayableCurrent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
20,250us-gaap_InterestPayableCurrent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
Other 30,276us-gaap_OtherLiabilitiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
27,872us-gaap_OtherLiabilitiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
TOTAL 409,999us-gaap_LiabilitiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
482,062us-gaap_LiabilitiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
NON-CURRENT LIABILITIES    
Accumulated deferred income taxes and taxes accrued 2,024,986us-gaap_DeferredTaxLiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
1,997,983us-gaap_DeferredTaxLiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
Accumulated deferred investment tax credits 37,407us-gaap_AccumulatedDeferredInvestmentTaxCredit
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
37,708us-gaap_AccumulatedDeferredInvestmentTaxCredit
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
Other regulatory liabilities 266,358us-gaap_RegulatoryLiabilityNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
254,036us-gaap_RegulatoryLiabilityNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
Decommissioning and asset retirement cost liabilities 830,655us-gaap_AssetRetirementObligationsNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
818,351us-gaap_AssetRetirementObligationsNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
Accumulated provisions 5,735us-gaap_AccruedLiabilitiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
5,689us-gaap_AccruedLiabilitiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
Pension and other postretirement liabilities 552,784us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
571,870us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
Long-term debt 2,671,406us-gaap_LongTermDebtNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
2,671,343us-gaap_LongTermDebtNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
Other 27,441us-gaap_OtherLiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
28,296us-gaap_OtherLiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
TOTAL 6,416,772us-gaap_LiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
6,385,276us-gaap_LiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
Subsidiaries' preferred stock without sinking fund 116,350us-gaap_TemporaryEquityCarryingAmountAttributableToParent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
116,350us-gaap_TemporaryEquityCarryingAmountAttributableToParent
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
Common Shareholders' Equity:    
Common stock 470us-gaap_CommonStockValue
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
470us-gaap_CommonStockValue
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
Paid-in capital 588,471us-gaap_AdditionalPaidInCapital
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
588,471us-gaap_AdditionalPaidInCapital
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
Retained earnings 1,251,443us-gaap_RetainedEarningsAccumulatedDeficit
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
1,235,296us-gaap_RetainedEarningsAccumulatedDeficit
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
TOTAL 1,840,384us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
1,824,237us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
TOTAL LIABILITIES AND EQUITY 8,783,505us-gaap_LiabilitiesAndStockholdersEquity
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
8,807,925us-gaap_LiabilitiesAndStockholdersEquity
/ dei_LegalEntityAxis
= etr_EntergyArkansasMember
Entergy Gulf States Louisiana [Member]    
Cash and cash equivalents:    
Cash 173us-gaap_Cash
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
53,394us-gaap_Cash
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
Temporary cash investments 114,846us-gaap_CashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
109,569us-gaap_CashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
Total cash and cash equivalents 115,019us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
162,963us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
Accounts receivable:    
Customer 74,005us-gaap_AccountsReceivableGrossCurrent
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
67,006us-gaap_AccountsReceivableGrossCurrent
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
Allowance for doubtful accounts (764)us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
(625)us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
Associated companies 114,918us-gaap_AccountsReceivableRelatedPartiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
86,966us-gaap_AccountsReceivableRelatedPartiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
Other 28,319us-gaap_OtherReceivables
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
18,379us-gaap_OtherReceivables
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
Accrued unbilled revenues 55,620etr_AccruedUnbilledRevenues
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
54,079etr_AccruedUnbilledRevenues
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
Total accounts receivable 272,098us-gaap_AccountsReceivableNetCurrent
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
225,805us-gaap_AccountsReceivableNetCurrent
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
Fuel inventory - at average cost 20,689etr_FuelInventoryAtAverageCost
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
16,207etr_FuelInventoryAtAverageCost
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
Materials and supplies - at average cost 117,957us-gaap_OtherInventorySupplies
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
121,237us-gaap_OtherInventorySupplies
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
Deferred nuclear refueling outage costs 42,441etr_DeferredNuclearRefuelingOutageCosts
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
7,416etr_DeferredNuclearRefuelingOutageCosts
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
Prepaid taxes 0us-gaap_PrepaidTaxes
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
24,058us-gaap_PrepaidTaxes
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
Prepayments and other 11,832us-gaap_OtherAssetsCurrent
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
21,064us-gaap_OtherAssetsCurrent
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
TOTAL 580,036us-gaap_AssetsCurrent
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
578,750us-gaap_AssetsCurrent
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
OTHER PROPERTY AND INVESTMENTS    
Investment in affiliates - at equity 355,906us-gaap_EquityMethodInvestments
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
355,906us-gaap_EquityMethodInvestments
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
Decommissioning trust funds 648,743us-gaap_DecommissioningFundInvestments
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
637,744us-gaap_DecommissioningFundInvestments
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
Non-utility property - at cost (less accumulated depreciation) 199,677us-gaap_PropertyPlantAndEquipmentNet
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
193,407us-gaap_PropertyPlantAndEquipmentNet
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
Escrow accounts 90,080etr_EscrowAccounts
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
90,061etr_EscrowAccounts
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
Other 15,463us-gaap_OtherLongTermInvestments
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
14,887us-gaap_OtherLongTermInvestments
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
TOTAL 1,309,869us-gaap_LongTermInvestments
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
1,292,005us-gaap_LongTermInvestments
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
PROPERTY, PLANT, AND EQUIPMENT    
Electric 7,663,441us-gaap_PublicUtilitiesPropertyPlantAndEquipmentOtherPropertyPlantAndEquipment
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
7,600,730us-gaap_PublicUtilitiesPropertyPlantAndEquipmentOtherPropertyPlantAndEquipment
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
Natural gas 150,065etr_NaturalGas
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
148,586etr_NaturalGas
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
Construction work in progress 119,094us-gaap_PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
127,436us-gaap_PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
Nuclear fuel 220,657us-gaap_NuclearFuelNetOfAmortization
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
131,901us-gaap_NuclearFuelNetOfAmortization
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
TOTAL PROPERTY, PLANT, AND EQUIPMENT 8,153,257us-gaap_PublicUtilitiesPropertyPlantAndEquipmentPlantInService
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
8,008,653us-gaap_PublicUtilitiesPropertyPlantAndEquipmentPlantInService
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
Less - accumulated depreciation and amortization 4,204,827us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
4,176,242us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
PROPERTY, PLANT, AND EQUIPMENT - NET 3,948,430us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
3,832,411us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
Regulatory assets:    
Regulatory asset for income taxes - net 161,553etr_SfasRegulatoryAssetNet
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
161,714etr_SfasRegulatoryAssetNet
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
Other regulatory assets 417,152etr_OtherRegulatoryAssets
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
426,381etr_OtherRegulatoryAssets
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
Deferred fuel costs 100,124etr_DeferredFuelCosts
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
100,124etr_DeferredFuelCosts
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
Other 15,704us-gaap_OtherAssetsNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
12,438us-gaap_OtherAssetsNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
TOTAL 694,533us-gaap_AssetsNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
700,657us-gaap_AssetsNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
TOTAL ASSETS 6,532,868us-gaap_Assets
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
6,403,823us-gaap_Assets
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
CURRENT LIABILITIES    
Currently maturing long-term debt 31,955us-gaap_LongTermDebtCurrent
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
31,955us-gaap_LongTermDebtCurrent
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
Associated companies accounts payable 96,857us-gaap_AccountsPayableRelatedPartiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
102,933us-gaap_AccountsPayableRelatedPartiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
Other 138,658us-gaap_AccountsPayableOtherCurrent
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
108,874us-gaap_AccountsPayableOtherCurrent
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
Customer deposits 57,633us-gaap_CustomerDepositsCurrent
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
56,749us-gaap_CustomerDepositsCurrent
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
Taxes accrued 20,831us-gaap_TaxesPayableCurrent
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
0us-gaap_TaxesPayableCurrent
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
Accumulated deferred income taxes 37,931us-gaap_DeferredTaxLiabilitiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
21,095us-gaap_DeferredTaxLiabilitiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
Interest accrued 31,515us-gaap_InterestPayableCurrent
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
27,075us-gaap_InterestPayableCurrent
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
Deferred fuel costs 19,643etr_DeferredFuelCostsCurrentLiabilities
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
10,580etr_DeferredFuelCostsCurrentLiabilities
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
Other 36,081us-gaap_OtherLiabilitiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
44,517us-gaap_OtherLiabilitiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
TOTAL 471,104us-gaap_LiabilitiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
403,778us-gaap_LiabilitiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
NON-CURRENT LIABILITIES    
Accumulated deferred income taxes and taxes accrued 1,568,844us-gaap_DeferredTaxLiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
1,601,032us-gaap_DeferredTaxLiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
Accumulated deferred investment tax credits 71,569us-gaap_AccumulatedDeferredInvestmentTaxCredit
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
72,277us-gaap_AccumulatedDeferredInvestmentTaxCredit
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
Other regulatory liabilities 178,734us-gaap_RegulatoryLiabilityNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
176,305us-gaap_RegulatoryLiabilityNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
Decommissioning and asset retirement cost liabilities 452,733us-gaap_AssetRetirementObligationsNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
446,619us-gaap_AssetRetirementObligationsNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
Accumulated provisions 109,213us-gaap_AccruedLiabilitiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
106,985us-gaap_AccruedLiabilitiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
Pension and other postretirement liabilities 397,813us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
401,144us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
Long-term debt 1,631,924us-gaap_LongTermDebtNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
1,590,862us-gaap_LongTermDebtNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
Long-term payables of associated companies 25,753etr_LongTermPayablesOfAssociatedCompanies
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
26,156etr_LongTermPayablesOfAssociatedCompanies
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
Other 140,565us-gaap_OtherLiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
148,102us-gaap_OtherLiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
TOTAL 4,577,148us-gaap_LiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
4,569,482us-gaap_LiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
Common Shareholders' Equity:    
Accumulated other comprehensive loss (52,925)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
(53,347)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
Subsidiaries' preferred stock without sinking fund 10,000us-gaap_MinorityInterest
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
10,000us-gaap_MinorityInterest
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
Members' Equity 1,527,541us-gaap_MembersEquity
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
1,473,910us-gaap_MembersEquity
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
TOTAL 1,484,616us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
1,430,563us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
TOTAL LIABILITIES AND EQUITY 6,532,868us-gaap_LiabilitiesAndStockholdersEquity
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
6,403,823us-gaap_LiabilitiesAndStockholdersEquity
/ dei_LegalEntityAxis
= etr_EntergyGulfStatesLouisianaMember
Entergy Louisiana [Member]    
Cash and cash equivalents:    
Cash 87us-gaap_Cash
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
431us-gaap_Cash
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
Temporary cash investments 167,480us-gaap_CashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
157,122us-gaap_CashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
Total cash and cash equivalents 167,567us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
157,553us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
Accounts receivable:    
Customer 128,211us-gaap_AccountsReceivableGrossCurrent
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
124,125us-gaap_AccountsReceivableGrossCurrent
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
Allowance for doubtful accounts (1,146)us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
(984)us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
Associated companies 81,403us-gaap_AccountsReceivableRelatedPartiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
48,474us-gaap_AccountsReceivableRelatedPartiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
Other 14,904us-gaap_OtherReceivables
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
9,150us-gaap_OtherReceivables
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
Accrued unbilled revenues 83,995etr_AccruedUnbilledRevenues
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
88,673etr_AccruedUnbilledRevenues
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
Total accounts receivable 307,367us-gaap_AccountsReceivableNetCurrent
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
269,438us-gaap_AccountsReceivableNetCurrent
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
Accumulated deferred income taxes 31,523us-gaap_DeferredTaxAssetsNetCurrent
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
74,558us-gaap_DeferredTaxAssetsNetCurrent
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
Fuel inventory - at average cost 29,622etr_FuelInventoryAtAverageCost
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
30,951etr_FuelInventoryAtAverageCost
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
Materials and supplies - at average cost 160,722us-gaap_OtherInventorySupplies
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
154,295us-gaap_OtherInventorySupplies
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
Deferred nuclear refueling outage costs 15,721etr_DeferredNuclearRefuelingOutageCosts
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
23,067etr_DeferredNuclearRefuelingOutageCosts
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
Prepaid taxes 29,566us-gaap_PrepaidTaxes
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
0us-gaap_PrepaidTaxes
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
Prepayments and other 23,047us-gaap_OtherAssetsCurrent
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
24,962us-gaap_OtherAssetsCurrent
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
TOTAL 765,135us-gaap_AssetsCurrent
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
734,824us-gaap_AssetsCurrent
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
OTHER PROPERTY AND INVESTMENTS    
Investment in affiliates - at equity 1,034,696us-gaap_EquityMethodInvestments
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
1,034,696us-gaap_EquityMethodInvestments
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
Decommissioning trust funds 391,822us-gaap_DecommissioningFundInvestments
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
383,615us-gaap_DecommissioningFundInvestments
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
Non-utility property - at cost (less accumulated depreciation) 169us-gaap_PropertyPlantAndEquipmentNet
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
214us-gaap_PropertyPlantAndEquipmentNet
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
Escrow accounts 200,093etr_EscrowAccounts
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
200,053etr_EscrowAccounts
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
TOTAL 1,626,780us-gaap_LongTermInvestments
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
1,618,578us-gaap_LongTermInvestments
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
PROPERTY, PLANT, AND EQUIPMENT    
Electric 9,731,402us-gaap_PublicUtilitiesPropertyPlantAndEquipmentOtherPropertyPlantAndEquipment
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
9,627,495us-gaap_PublicUtilitiesPropertyPlantAndEquipmentOtherPropertyPlantAndEquipment
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
Property under capital lease 334,716us-gaap_CapitalLeasedAssetsGross
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
334,716us-gaap_CapitalLeasedAssetsGross
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
Construction work in progress 201,091us-gaap_PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
241,923us-gaap_PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
Nuclear fuel 139,644us-gaap_NuclearFuelNetOfAmortization
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
162,721us-gaap_NuclearFuelNetOfAmortization
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
TOTAL PROPERTY, PLANT, AND EQUIPMENT 10,406,853us-gaap_PublicUtilitiesPropertyPlantAndEquipmentPlantInService
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
10,366,855us-gaap_PublicUtilitiesPropertyPlantAndEquipmentPlantInService
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
Less - accumulated depreciation and amortization 3,998,742us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
3,942,916us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
PROPERTY, PLANT, AND EQUIPMENT - NET 6,408,111us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
6,423,939us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
Regulatory assets:    
Regulatory asset for income taxes - net 323,722etr_SfasRegulatoryAssetNet
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
324,555etr_SfasRegulatoryAssetNet
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
Other regulatory assets 902,035etr_OtherRegulatoryAssets
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
914,229etr_OtherRegulatoryAssets
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
Deferred fuel costs 67,998etr_DeferredFuelCosts
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
67,998etr_DeferredFuelCosts
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
Other 49,746us-gaap_OtherAssetsNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
45,182us-gaap_OtherAssetsNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
TOTAL 1,343,501us-gaap_AssetsNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
1,351,964us-gaap_AssetsNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
TOTAL ASSETS 10,143,527us-gaap_Assets
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
10,129,305us-gaap_Assets
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
CURRENT LIABILITIES    
Currently maturing long-term debt 28,431us-gaap_LongTermDebtCurrent
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
19,525us-gaap_LongTermDebtCurrent
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
Short-term borrowings 27,293us-gaap_ShortTermBorrowings
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
46,033us-gaap_ShortTermBorrowings
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
Associated companies accounts payable 59,810us-gaap_AccountsPayableRelatedPartiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
74,692us-gaap_AccountsPayableRelatedPartiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
Other 128,598us-gaap_AccountsPayableOtherCurrent
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
164,329us-gaap_AccountsPayableOtherCurrent
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
Customer deposits 93,729us-gaap_CustomerDepositsCurrent
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
93,010us-gaap_CustomerDepositsCurrent
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
Taxes accrued 0us-gaap_TaxesPayableCurrent
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
860us-gaap_TaxesPayableCurrent
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
Interest accrued 40,649us-gaap_InterestPayableCurrent
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
44,372us-gaap_InterestPayableCurrent
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
Deferred fuel costs 56,002etr_DeferredFuelCostsCurrentLiabilities
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
50,432etr_DeferredFuelCostsCurrentLiabilities
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
Other 44,153us-gaap_OtherLiabilitiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
48,250us-gaap_OtherLiabilitiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
TOTAL 478,665us-gaap_LiabilitiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
541,503us-gaap_LiabilitiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
NON-CURRENT LIABILITIES    
Accumulated deferred income taxes and taxes accrued 1,441,003us-gaap_DeferredTaxLiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
1,406,507us-gaap_DeferredTaxLiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
Accumulated deferred investment tax credits 64,165us-gaap_AccumulatedDeferredInvestmentTaxCredit
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
64,771us-gaap_AccumulatedDeferredInvestmentTaxCredit
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
Other regulatory liabilities 544,890us-gaap_RegulatoryLiabilityNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
546,084us-gaap_RegulatoryLiabilityNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
Decommissioning and asset retirement cost liabilities 510,093us-gaap_AssetRetirementObligationsNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
503,734us-gaap_AssetRetirementObligationsNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
Accumulated provisions 212,344us-gaap_AccruedLiabilitiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
212,243us-gaap_AccruedLiabilitiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
Pension and other postretirement liabilities 523,345us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
530,844us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
Long-term debt 3,312,154us-gaap_LongTermDebtNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
3,337,054us-gaap_LongTermDebtNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
Other 69,960us-gaap_OtherLiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
70,141us-gaap_OtherLiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
TOTAL 6,677,954us-gaap_LiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
6,671,378us-gaap_LiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
Common Shareholders' Equity:    
Accumulated other comprehensive loss (25,918)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
(25,876)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
Subsidiaries' preferred stock without sinking fund 100,000us-gaap_MinorityInterest
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
100,000us-gaap_MinorityInterest
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
Members' Equity 2,912,826us-gaap_MembersEquity
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
2,842,300us-gaap_MembersEquity
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
TOTAL 2,986,908us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
2,916,424us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
TOTAL LIABILITIES AND EQUITY 10,143,527us-gaap_LiabilitiesAndStockholdersEquity
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
10,129,305us-gaap_LiabilitiesAndStockholdersEquity
/ dei_LegalEntityAxis
= etr_EntergyLouisianaMember
Entergy Mississippi [Member]    
Cash and cash equivalents:    
Cash 6,077us-gaap_Cash
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
1,223us-gaap_Cash
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
Temporary cash investments 77,634us-gaap_CashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
60,410us-gaap_CashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
Total cash and cash equivalents 83,711us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
61,633us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
Accounts receivable:    
Customer 88,854us-gaap_AccountsReceivableGrossCurrent
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
78,593us-gaap_AccountsReceivableGrossCurrent
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
Allowance for doubtful accounts (913)us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
(873)us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
Associated companies 21,913us-gaap_AccountsReceivableRelatedPartiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
21,233us-gaap_AccountsReceivableRelatedPartiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
Other 7,441us-gaap_OtherReceivables
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
42,009us-gaap_OtherReceivables
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
Accrued unbilled revenues 43,791etr_AccruedUnbilledRevenues
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
43,374etr_AccruedUnbilledRevenues
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
Total accounts receivable 161,086us-gaap_AccountsReceivableNetCurrent
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
184,336us-gaap_AccountsReceivableNetCurrent
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
Accumulated deferred income taxes 2,356us-gaap_DeferredTaxAssetsNetCurrent
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
5,198us-gaap_DeferredTaxAssetsNetCurrent
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
Fuel inventory - at average cost 47,364etr_FuelInventoryAtAverageCost
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
42,736etr_FuelInventoryAtAverageCost
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
Materials and supplies - at average cost 38,717us-gaap_OtherInventorySupplies
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
37,741us-gaap_OtherInventorySupplies
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
Prepayments and other 6,286us-gaap_OtherAssetsCurrent
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
7,315us-gaap_OtherAssetsCurrent
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
TOTAL 339,520us-gaap_AssetsCurrent
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
338,959us-gaap_AssetsCurrent
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
OTHER PROPERTY AND INVESTMENTS    
Non-utility property - at cost (less accumulated depreciation) 4,637us-gaap_PropertyPlantAndEquipmentNet
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
4,642us-gaap_PropertyPlantAndEquipmentNet
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
Escrow accounts 41,754etr_EscrowAccounts
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
41,752etr_EscrowAccounts
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
TOTAL 46,391us-gaap_LongTermInvestments
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
46,394us-gaap_LongTermInvestments
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
PROPERTY, PLANT, AND EQUIPMENT    
Electric 3,955,077us-gaap_PublicUtilitiesPropertyPlantAndEquipmentOtherPropertyPlantAndEquipment
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
3,999,918us-gaap_PublicUtilitiesPropertyPlantAndEquipmentOtherPropertyPlantAndEquipment
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
Property under capital lease 3,883us-gaap_CapitalLeasedAssetsGross
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
4,185us-gaap_CapitalLeasedAssetsGross
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
Construction work in progress 85,035us-gaap_PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
67,514us-gaap_PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
TOTAL PROPERTY, PLANT, AND EQUIPMENT 4,043,995us-gaap_PublicUtilitiesPropertyPlantAndEquipmentPlantInService
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
4,071,617us-gaap_PublicUtilitiesPropertyPlantAndEquipmentPlantInService
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
Less - accumulated depreciation and amortization 1,471,931us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
1,516,540us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
PROPERTY, PLANT, AND EQUIPMENT - NET 2,572,064us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
2,555,077us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
Regulatory assets:    
Regulatory asset for income taxes - net 43,959etr_SfasRegulatoryAssetNet
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
49,306etr_SfasRegulatoryAssetNet
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
Other regulatory assets 355,029etr_OtherRegulatoryAssets
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
364,747etr_OtherRegulatoryAssets
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
Other 21,282us-gaap_OtherAssetsNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
19,121us-gaap_OtherAssetsNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
TOTAL 420,270us-gaap_AssetsNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
433,174us-gaap_AssetsNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
TOTAL ASSETS 3,378,245us-gaap_Assets
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
3,373,604us-gaap_Assets
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
CURRENT LIABILITIES    
Associated companies accounts payable 43,889us-gaap_AccountsPayableRelatedPartiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
49,832us-gaap_AccountsPayableRelatedPartiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
Other 57,323us-gaap_AccountsPayableOtherCurrent
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
63,300us-gaap_AccountsPayableOtherCurrent
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
Customer deposits 79,549us-gaap_CustomerDepositsCurrent
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
77,753us-gaap_CustomerDepositsCurrent
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
Taxes accrued 75,066us-gaap_TaxesPayableCurrent
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
53,565us-gaap_TaxesPayableCurrent
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
Accumulated deferred income taxes 195us-gaap_DeferredTaxLiabilitiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
0us-gaap_DeferredTaxLiabilitiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
Interest accrued 16,954us-gaap_InterestPayableCurrent
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
23,172us-gaap_InterestPayableCurrent
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
Deferred fuel costs 42,438etr_DeferredFuelCostsCurrentLiabilities
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
2,194etr_DeferredFuelCostsCurrentLiabilities
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
Other 14,715us-gaap_OtherLiabilitiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
17,533us-gaap_OtherLiabilitiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
TOTAL 330,129us-gaap_LiabilitiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
287,349us-gaap_LiabilitiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
NON-CURRENT LIABILITIES    
Accumulated deferred income taxes and taxes accrued 738,678us-gaap_DeferredTaxLiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
800,374us-gaap_DeferredTaxLiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
Accumulated deferred investment tax credits 10,523us-gaap_AccumulatedDeferredInvestmentTaxCredit
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
6,370us-gaap_AccumulatedDeferredInvestmentTaxCredit
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
Decommissioning and asset retirement cost liabilities 6,885us-gaap_AssetRetirementObligationsNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
6,786us-gaap_AssetRetirementObligationsNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
Accumulated provisions 49,985us-gaap_AccruedLiabilitiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
50,142us-gaap_AccruedLiabilitiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
Pension and other postretirement liabilities 131,003us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
135,156us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
Long-term debt 1,058,869us-gaap_LongTermDebtNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
1,058,838us-gaap_LongTermDebtNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
Other 15,394us-gaap_OtherLiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
16,038us-gaap_OtherLiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
TOTAL 2,011,337us-gaap_LiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
2,073,704us-gaap_LiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
Subsidiaries' preferred stock without sinking fund 50,381us-gaap_TemporaryEquityCarryingAmountAttributableToParent
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
50,381us-gaap_TemporaryEquityCarryingAmountAttributableToParent
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
Common Shareholders' Equity:    
Common stock 199,326us-gaap_CommonStockValue
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
199,326us-gaap_CommonStockValue
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
Paid-in capital (690)us-gaap_AdditionalPaidInCapital
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
(690)us-gaap_AdditionalPaidInCapital
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
Retained earnings 787,762us-gaap_RetainedEarningsAccumulatedDeficit
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
763,534us-gaap_RetainedEarningsAccumulatedDeficit
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
TOTAL 986,398us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
962,170us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
TOTAL LIABILITIES AND EQUITY 3,378,245us-gaap_LiabilitiesAndStockholdersEquity
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
3,373,604us-gaap_LiabilitiesAndStockholdersEquity
/ dei_LegalEntityAxis
= etr_EntergyMississippiMember
Entergy New Orleans [Member]    
Cash and cash equivalents:    
Cash 1,037us-gaap_Cash
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
1,006us-gaap_Cash
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
Temporary cash investments 21,013us-gaap_CashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
41,383us-gaap_CashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
Total cash and cash equivalents 22,050us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
42,389us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
Accounts receivable:    
Customer 39,174us-gaap_AccountsReceivableGrossCurrent
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
35,663us-gaap_AccountsReceivableGrossCurrent
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
Allowance for doubtful accounts (250)us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
(262)us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
Associated companies 10,116us-gaap_AccountsReceivableRelatedPartiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
11,693us-gaap_AccountsReceivableRelatedPartiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
Other 2,619us-gaap_OtherReceivables
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
3,223us-gaap_OtherReceivables
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
Accrued unbilled revenues 13,114etr_AccruedUnbilledRevenues
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
16,465etr_AccruedUnbilledRevenues
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
Total accounts receivable 64,773us-gaap_AccountsReceivableNetCurrent
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
66,782us-gaap_AccountsReceivableNetCurrent
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
Accumulated deferred income taxes 6,200us-gaap_DeferredTaxAssetsNetCurrent
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
8,562us-gaap_DeferredTaxAssetsNetCurrent
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
Fuel inventory - at average cost 1,656etr_FuelInventoryAtAverageCost
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
3,016etr_FuelInventoryAtAverageCost
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
Materials and supplies - at average cost 12,723us-gaap_OtherInventorySupplies
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
12,650us-gaap_OtherInventorySupplies
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
Prepayments and other 13,633us-gaap_OtherAssetsCurrent
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
6,887us-gaap_OtherAssetsCurrent
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
TOTAL 121,035us-gaap_AssetsCurrent
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
140,286us-gaap_AssetsCurrent
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
OTHER PROPERTY AND INVESTMENTS    
Non-utility property - at cost (less accumulated depreciation) 1,016us-gaap_PropertyPlantAndEquipmentNet
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
1,016us-gaap_PropertyPlantAndEquipmentNet
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
Escrow accounts 19,841etr_EscrowAccounts
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
18,038etr_EscrowAccounts
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
TOTAL 20,857us-gaap_LongTermInvestments
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
19,054us-gaap_LongTermInvestments
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
PROPERTY, PLANT, AND EQUIPMENT    
Electric 946,420us-gaap_PublicUtilitiesPropertyPlantAndEquipmentOtherPropertyPlantAndEquipment
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
936,862us-gaap_PublicUtilitiesPropertyPlantAndEquipmentOtherPropertyPlantAndEquipment
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
Natural gas 229,884etr_NaturalGas
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
228,979etr_NaturalGas
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
Construction work in progress 18,370us-gaap_PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
18,866us-gaap_PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
TOTAL PROPERTY, PLANT, AND EQUIPMENT 1,194,674us-gaap_PublicUtilitiesPropertyPlantAndEquipmentPlantInService
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
1,184,707us-gaap_PublicUtilitiesPropertyPlantAndEquipmentPlantInService
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
Less - accumulated depreciation and amortization 603,108us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
594,945us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
PROPERTY, PLANT, AND EQUIPMENT - NET 591,566us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
589,762us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
Regulatory assets:    
Other regulatory assets 175,955etr_OtherRegulatoryAssets
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
175,596etr_OtherRegulatoryAssets
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
Deferred fuel costs 4,080etr_DeferredFuelCosts
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
4,080etr_DeferredFuelCosts
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
Other 6,602us-gaap_OtherAssetsNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
5,345us-gaap_OtherAssetsNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
TOTAL 186,637us-gaap_AssetsNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
185,021us-gaap_AssetsNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
TOTAL ASSETS 920,095us-gaap_Assets
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
934,123us-gaap_Assets
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
CURRENT LIABILITIES    
Associated companies accounts payable 31,345us-gaap_AccountsPayableRelatedPartiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
33,170us-gaap_AccountsPayableRelatedPartiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
Other 19,624us-gaap_AccountsPayableOtherCurrent
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
22,435us-gaap_AccountsPayableOtherCurrent
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
Customer deposits 25,089us-gaap_CustomerDepositsCurrent
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
24,681us-gaap_CustomerDepositsCurrent
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
Interest accrued 2,297us-gaap_InterestPayableCurrent
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
3,538us-gaap_InterestPayableCurrent
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
Deferred fuel costs 24,338etr_DeferredFuelCostsCurrentLiabilities
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
28,397etr_DeferredFuelCostsCurrentLiabilities
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
Other 4,641us-gaap_OtherLiabilitiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
6,830us-gaap_OtherLiabilitiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
TOTAL 107,334us-gaap_LiabilitiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
119,051us-gaap_LiabilitiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
NON-CURRENT LIABILITIES    
Accumulated deferred income taxes and taxes accrued 205,280us-gaap_DeferredTaxLiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
199,241us-gaap_DeferredTaxLiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
Accumulated deferred investment tax credits 828us-gaap_AccumulatedDeferredInvestmentTaxCredit
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
864us-gaap_AccumulatedDeferredInvestmentTaxCredit
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
Regulatory liability for income taxes - net 17,670etr_RegulatoryLiabilityForIncomeTaxesNet
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
20,640etr_RegulatoryLiabilityForIncomeTaxesNet
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
Decommissioning and asset retirement cost liabilities 2,554us-gaap_AssetRetirementObligationsNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
2,511us-gaap_AssetRetirementObligationsNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
Accumulated provisions 23,865us-gaap_AccruedLiabilitiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
25,877us-gaap_AccruedLiabilitiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
Pension and other postretirement liabilities 59,427us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
62,440us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
Long-term debt 225,875us-gaap_LongTermDebtNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
225,866us-gaap_LongTermDebtNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
Gas system rebuild insurance proceeds 20,776etr_GasSystemRebuildInsuranceProceeds
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
23,218etr_GasSystemRebuildInsuranceProceeds
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
Other 5,118us-gaap_OtherLiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
6,610us-gaap_OtherLiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
TOTAL 561,393us-gaap_LiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
567,267us-gaap_LiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
Subsidiaries' preferred stock without sinking fund 19,780us-gaap_TemporaryEquityCarryingAmountAttributableToParent
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
19,780us-gaap_TemporaryEquityCarryingAmountAttributableToParent
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
Common Shareholders' Equity:    
Common stock 33,744us-gaap_CommonStockValue
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
33,744us-gaap_CommonStockValue
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
Paid-in capital 36,294us-gaap_AdditionalPaidInCapital
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
36,294us-gaap_AdditionalPaidInCapital
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
Retained earnings 161,550us-gaap_RetainedEarningsAccumulatedDeficit
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
157,987us-gaap_RetainedEarningsAccumulatedDeficit
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
TOTAL 231,588us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
228,025us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
TOTAL LIABILITIES AND EQUITY 920,095us-gaap_LiabilitiesAndStockholdersEquity
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
934,123us-gaap_LiabilitiesAndStockholdersEquity
/ dei_LegalEntityAxis
= etr_EntergyNewOrleansMember
Entergy Texas [Member]    
Cash and cash equivalents:    
Cash 1,926us-gaap_Cash
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
1,733us-gaap_Cash
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
Temporary cash investments 13,586us-gaap_CashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
28,708us-gaap_CashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
Total cash and cash equivalents 15,512us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
30,441us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
Securitization recovery trust account 28,065us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
37,219us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
Accounts receivable:    
Customer 67,565us-gaap_AccountsReceivableGrossCurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
70,993us-gaap_AccountsReceivableGrossCurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
Allowance for doubtful accounts (499)us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
(672)us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
Associated companies 45,435us-gaap_AccountsReceivableRelatedPartiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
57,004us-gaap_AccountsReceivableRelatedPartiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
Other 10,363us-gaap_OtherReceivables
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
10,985us-gaap_OtherReceivables
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
Accrued unbilled revenues 33,108etr_AccruedUnbilledRevenues
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
38,363etr_AccruedUnbilledRevenues
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
Total accounts receivable 155,972us-gaap_AccountsReceivableNetCurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
176,673us-gaap_AccountsReceivableNetCurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
Deferred fuel costs 0us-gaap_DeferredFuelCost
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
11,861us-gaap_DeferredFuelCost
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
Accumulated deferred income taxes 5,369us-gaap_DeferredTaxAssetsNetCurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
669us-gaap_DeferredTaxAssetsNetCurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
Fuel inventory - at average cost 53,878etr_FuelInventoryAtAverageCost
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
49,902etr_FuelInventoryAtAverageCost
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
Materials and supplies - at average cost 34,811us-gaap_OtherInventorySupplies
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
33,892us-gaap_OtherInventorySupplies
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
Prepayments and other 14,761us-gaap_OtherAssetsCurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
29,211us-gaap_OtherAssetsCurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
TOTAL 308,368us-gaap_AssetsCurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
369,868us-gaap_AssetsCurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
OTHER PROPERTY AND INVESTMENTS    
Investment in affiliates - at equity 647us-gaap_EquityMethodInvestments
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
655us-gaap_EquityMethodInvestments
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
Non-utility property - at cost (less accumulated depreciation) 376us-gaap_PropertyPlantAndEquipmentNet
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
376us-gaap_PropertyPlantAndEquipmentNet
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
Other 19,674us-gaap_OtherLongTermInvestments
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
19,085us-gaap_OtherLongTermInvestments
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
TOTAL 20,697us-gaap_LongTermInvestments
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
20,116us-gaap_LongTermInvestments
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
PROPERTY, PLANT, AND EQUIPMENT    
Electric 3,820,069us-gaap_PublicUtilitiesPropertyPlantAndEquipmentOtherPropertyPlantAndEquipment
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
3,761,847us-gaap_PublicUtilitiesPropertyPlantAndEquipmentOtherPropertyPlantAndEquipment
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
Construction work in progress 108,637us-gaap_PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
125,425us-gaap_PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
TOTAL PROPERTY, PLANT, AND EQUIPMENT 3,928,706us-gaap_PublicUtilitiesPropertyPlantAndEquipmentPlantInService
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
3,887,272us-gaap_PublicUtilitiesPropertyPlantAndEquipmentPlantInService
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
Less - accumulated depreciation and amortization 1,469,690us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
1,454,701us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
PROPERTY, PLANT, AND EQUIPMENT - NET 2,459,016us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
2,432,571us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
Regulatory assets:    
Regulatory asset for income taxes - net 122,787etr_SfasRegulatoryAssetNet
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
123,407etr_SfasRegulatoryAssetNet
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
Other regulatory assets 896,642etr_OtherRegulatoryAssets
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
922,087etr_OtherRegulatoryAssets
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
Long-term receivables - associated companies 25,753us-gaap_DueFromRelatedPartiesNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
26,156us-gaap_DueFromRelatedPartiesNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
Other 16,031us-gaap_OtherAssetsNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
13,880us-gaap_OtherAssetsNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
TOTAL 1,061,213us-gaap_AssetsNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
1,085,530us-gaap_AssetsNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
TOTAL ASSETS 3,849,294us-gaap_Assets
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
3,908,085us-gaap_Assets
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
CURRENT LIABILITIES    
Currently maturing long-term debt 200,000us-gaap_LongTermDebtCurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
200,000us-gaap_LongTermDebtCurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
Associated companies accounts payable 84,166us-gaap_AccountsPayableRelatedPartiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
91,481us-gaap_AccountsPayableRelatedPartiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
Other 65,411us-gaap_AccountsPayableOtherCurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
87,910us-gaap_AccountsPayableOtherCurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
Customer deposits 43,202us-gaap_CustomerDepositsCurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
44,308us-gaap_CustomerDepositsCurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
Taxes accrued 68,128us-gaap_TaxesPayableCurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
1,849us-gaap_TaxesPayableCurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
Interest accrued 20,805us-gaap_InterestPayableCurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
29,757us-gaap_InterestPayableCurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
Deferred fuel costs 3,656etr_DeferredFuelCostsCurrentLiabilities
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
0etr_DeferredFuelCostsCurrentLiabilities
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
Other 10,477us-gaap_OtherLiabilitiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
18,238us-gaap_OtherLiabilitiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
TOTAL 495,845us-gaap_LiabilitiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
473,543us-gaap_LiabilitiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
NON-CURRENT LIABILITIES    
Accumulated deferred income taxes and taxes accrued 975,718us-gaap_DeferredTaxLiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
1,046,618us-gaap_DeferredTaxLiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
Accumulated deferred investment tax credits 14,510us-gaap_AccumulatedDeferredInvestmentTaxCredit
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
14,735us-gaap_AccumulatedDeferredInvestmentTaxCredit
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
Other regulatory liabilities 5,334us-gaap_RegulatoryLiabilityNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
5,125us-gaap_RegulatoryLiabilityNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
Decommissioning and asset retirement cost liabilities 4,677us-gaap_AssetRetirementObligationsNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
4,610us-gaap_AssetRetirementObligationsNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
Accumulated provisions 13,470us-gaap_AccruedLiabilitiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
12,218us-gaap_AccruedLiabilitiesCurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
Pension and other postretirement liabilities 106,645us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
111,011us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
Long-term debt 1,256,274us-gaap_LongTermDebtNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
1,278,931us-gaap_LongTermDebtNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
Other 68,399us-gaap_OtherLiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
69,463us-gaap_OtherLiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
TOTAL 2,445,027us-gaap_LiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
2,542,711us-gaap_LiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
Common Shareholders' Equity:    
Common stock 49,452us-gaap_CommonStockValue
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
49,452us-gaap_CommonStockValue
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
Paid-in capital 481,994us-gaap_AdditionalPaidInCapital
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
481,994us-gaap_AdditionalPaidInCapital
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
Retained earnings 376,976us-gaap_RetainedEarningsAccumulatedDeficit
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
360,385us-gaap_RetainedEarningsAccumulatedDeficit
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
TOTAL 908,422us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
891,831us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
TOTAL LIABILITIES AND EQUITY 3,849,294us-gaap_LiabilitiesAndStockholdersEquity
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
3,908,085us-gaap_LiabilitiesAndStockholdersEquity
/ dei_LegalEntityAxis
= etr_EntergyTexasMember
System Energy [Member]    
Cash and cash equivalents:    
Cash 4,424us-gaap_Cash
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
789us-gaap_Cash
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
Temporary cash investments 171,484us-gaap_CashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
222,390us-gaap_CashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
Total cash and cash equivalents 175,908us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
223,179us-gaap_CashAndCashEquivalentsAtCarryingValue
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
Accounts receivable:    
Associated companies 80,135us-gaap_AccountsReceivableRelatedPartiesCurrent
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
60,907us-gaap_AccountsReceivableRelatedPartiesCurrent
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
Other 4,410us-gaap_OtherReceivables
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
5,717us-gaap_OtherReceivables
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
Total accounts receivable 84,545us-gaap_AccountsReceivableNetCurrent
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
66,624us-gaap_AccountsReceivableNetCurrent
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
Materials and supplies - at average cost 80,975us-gaap_OtherInventorySupplies
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
80,049us-gaap_OtherInventorySupplies
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
Deferred nuclear refueling outage costs 20,937etr_DeferredNuclearRefuelingOutageCosts
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
26,580etr_DeferredNuclearRefuelingOutageCosts
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
Prepayments and other 6,429us-gaap_OtherAssetsCurrent
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
2,312us-gaap_OtherAssetsCurrent
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
TOTAL 368,794us-gaap_AssetsCurrent
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
398,744us-gaap_AssetsCurrent
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
OTHER PROPERTY AND INVESTMENTS    
Decommissioning trust funds 696,223us-gaap_DecommissioningFundInvestments
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
679,840us-gaap_DecommissioningFundInvestments
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
TOTAL 696,223us-gaap_LongTermInvestments
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
679,840us-gaap_LongTermInvestments
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
PROPERTY, PLANT, AND EQUIPMENT    
Electric 4,246,650us-gaap_PublicUtilitiesPropertyPlantAndEquipmentOtherPropertyPlantAndEquipment
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
4,244,902us-gaap_PublicUtilitiesPropertyPlantAndEquipmentOtherPropertyPlantAndEquipment
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
Property under capital lease 573,784us-gaap_CapitalLeasedAssetsGross
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
573,784us-gaap_CapitalLeasedAssetsGross
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
Construction work in progress 56,391us-gaap_PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
50,382us-gaap_PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
Nuclear fuel 226,937us-gaap_NuclearFuelNetOfAmortization
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
251,376us-gaap_NuclearFuelNetOfAmortization
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
TOTAL PROPERTY, PLANT, AND EQUIPMENT 5,103,762us-gaap_PublicUtilitiesPropertyPlantAndEquipmentPlantInService
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
5,120,444us-gaap_PublicUtilitiesPropertyPlantAndEquipmentPlantInService
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
Less - accumulated depreciation and amortization 2,854,193us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
2,819,688us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
PROPERTY, PLANT, AND EQUIPMENT - NET 2,249,569us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
2,300,756us-gaap_PublicUtilitiesPropertyPlantAndEquipmentNet
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
Regulatory assets:    
Regulatory asset for income taxes - net 105,891etr_SfasRegulatoryAssetNet
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
105,882etr_SfasRegulatoryAssetNet
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
Other regulatory assets 338,097etr_OtherRegulatoryAssets
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
335,613etr_OtherRegulatoryAssets
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
Other 8,624us-gaap_OtherAssetsNoncurrent
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
9,251us-gaap_OtherAssetsNoncurrent
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
TOTAL 452,612us-gaap_AssetsNoncurrent
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
450,746us-gaap_AssetsNoncurrent
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
TOTAL ASSETS 3,767,198us-gaap_Assets
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
3,830,086us-gaap_Assets
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
CURRENT LIABILITIES    
Currently maturing long-term debt 64,906us-gaap_LongTermDebtCurrent
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
76,310us-gaap_LongTermDebtCurrent
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
Short-term borrowings 0us-gaap_ShortTermBorrowings
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
20,404us-gaap_ShortTermBorrowings
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
Associated companies accounts payable 2,642us-gaap_AccountsPayableRelatedPartiesCurrent
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
6,252us-gaap_AccountsPayableRelatedPartiesCurrent
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
Other 28,111us-gaap_AccountsPayableOtherCurrent
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
33,096us-gaap_AccountsPayableOtherCurrent
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
Taxes accrued 8,823us-gaap_TaxesPayableCurrent
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
23,267us-gaap_TaxesPayableCurrent
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
Accumulated deferred income taxes 12,005us-gaap_DeferredTaxLiabilitiesCurrent
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
14,175us-gaap_DeferredTaxLiabilitiesCurrent
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
Interest accrued 18,914us-gaap_InterestPayableCurrent
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
33,196us-gaap_InterestPayableCurrent
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
Other 2,366us-gaap_OtherLiabilitiesCurrent
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
2,365us-gaap_OtherLiabilitiesCurrent
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
TOTAL 137,767us-gaap_LiabilitiesCurrent
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
209,065us-gaap_LiabilitiesCurrent
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
NON-CURRENT LIABILITIES    
Accumulated deferred income taxes and taxes accrued 800,309us-gaap_DeferredTaxLiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
808,171us-gaap_DeferredTaxLiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
Accumulated deferred investment tax credits 51,163us-gaap_AccumulatedDeferredInvestmentTaxCredit
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
49,313us-gaap_AccumulatedDeferredInvestmentTaxCredit
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
Other regulatory liabilities 371,806us-gaap_RegulatoryLiabilityNoncurrent
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
371,110us-gaap_RegulatoryLiabilityNoncurrent
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
Decommissioning and asset retirement cost liabilities 769,620us-gaap_AssetRetirementObligationsNoncurrent
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
757,918us-gaap_AssetRetirementObligationsNoncurrent
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
Pension and other postretirement liabilities 125,964us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
129,152us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
Long-term debt 634,523us-gaap_LongTermDebtNoncurrent
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
634,496us-gaap_LongTermDebtNoncurrent
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
Other 2us-gaap_OtherLiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
350us-gaap_OtherLiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
TOTAL 2,753,387us-gaap_LiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
2,750,510us-gaap_LiabilitiesNoncurrent
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
Common Shareholders' Equity:    
Common stock 789,350us-gaap_CommonStockValue
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
789,350us-gaap_CommonStockValue
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
Retained earnings 86,694us-gaap_RetainedEarningsAccumulatedDeficit
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
81,161us-gaap_RetainedEarningsAccumulatedDeficit
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
TOTAL 876,044us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
870,511us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
TOTAL LIABILITIES AND EQUITY $ 3,767,198us-gaap_LiabilitiesAndStockholdersEquity
/ dei_LegalEntityAxis
= etr_SystemEnergyMember
$ 3,830,086us-gaap_LiabilitiesAndStockholdersEquity
/ dei_LegalEntityAxis
= etr_SystemEnergyMember