Cash Collateral Requirement

No definition available.

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Namespace Prefix:	etr_
Data Type:	xbrli:monetaryItemType
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- Definition

Derivative Instruments Gain Loss Reclassified From Accumulated OCI Into Income Effective Portion, Tax.

+ References

No definition available.

+ Details

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Namespace Prefix:	etr_
Data Type:	xbrli:monetaryItemType
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- Definition

Dollar amount of hedge contract in a liability position.

+ References

No definition available.

+ Details

Name:	etr_HedgeContractsInLiabilityPosition
Namespace Prefix:	etr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Hedging the Variability in Future Cash Flow, Period

+ References

No definition available.

+ Details

Name:	etr_HedgingtheVariabilityinFutureCashFlowPeriod
Namespace Prefix:	etr_
Data Type:	xbrli:durationItemType
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- Definition

Number of Hedge Contracts Counterparties

+ References

No definition available.

+ Details

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- Definition

Planned Generation From Non Nuclear Power Plants Sold Forward Under Financial Hedges

+ References

No definition available.

+ Details

Name:	etr_PlannedGenerationFromNonNuclearPowerPlantsSoldForwardUnderFinancialDerivatives
Namespace Prefix:	etr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Planned generation sold forward from non utility nuclear power plants in the next twelve months

+ References

No definition available.

+ Details

Name:	etr_Plannedgenerationsoldforwardfromnonutilitynuclearpowerplantsinthenexttwelvemonths
Namespace Prefix:	etr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Planned Generation Under Normal Purchase Sold Under Financial Derivatives

+ References

No definition available.

+ Details

Name:	etr_PlannedGenerationUnderNormalPurchaseSoldUnderFinancialDerivatives
Namespace Prefix:	etr_
Data Type:	num:energyItemType
Balance Type:	na
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- Details

Name:	etr_RiskManagementAndFairValuesTextualAbstract
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- Definition

Volume of Fixed Transmission Rights Outstanding

+ References

No definition available.

+ Details

Name:	etr_VolumeofFixedTransmissionRightsOutstanding
Namespace Prefix:	etr_
Data Type:	num:energyItemType
Balance Type:	na
Period Type:	instant

- Definition

Total volume of natural gas swaps outstanding.

+ References

No definition available.

+ Details

Name:	etr_VolumeOfNaturalGasSwapsOutstanding
Namespace Prefix:	etr_
Data Type:	num:energyItemType
Balance Type:	na
Period Type:	instant

- Definition

The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=7668309&loc=d3e80748-113994

+ Details

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Period Type:	duration

- Definition

The aggregate fair value of assets that are already posted, at the end of the reporting period, as collateral for derivative instruments with credit-risk-related contingent features.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4H

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624258-113959

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The net gain (loss) recognized in earnings during the period due to ineffectiveness in price risk cash flow hedges.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4C

-Subparagraph (d)(1)

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of unrealized gain (loss) related to derivatives designated as cash flow hedging instruments, recorded in results of operations to the extent that the cash flow hedge is determined to be ineffective.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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Period Type:	duration

- Details

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- Details

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- Details

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Risk Management and Fair Values (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014 counterparty MWh MMBTU	Dec. 31, 2013 counterparty	Dec. 31, 2012
Risk Management and Fair Values [Abstract]
Cash Collateral Requirement		$ 47etr_CashCollateralRequirement
Number of Hedge Contracts Counterparties	1	9
Cash flow hedges relating to power sales as part of net unrealized gains	156
Reclassified from accumulated other comprehensive income (OCI) to operating revenues	109
Maturity of cash flow hedges, Tax	(68)	18	94
Planned generation sold forward from non utility nuclear power plants	86.00%
Planned Generation Sold Forward under financial derivatives	62.00%
Planned Generation Under Normal Purchase Sold Under Financial Derivatives	35,000,000
Change in cash flow hedges due to ineffectiveness	7	(6)	(14)
Hedge Contracts In Liability Position	1etr_HedgeContractsInLiabilityPosition	187etr_HedgeContractsInLiabilityPosition
Total volume of natural gas swaps outstanding (MMBtu)	21,475,000etr_VolumeOfNaturalGasSwapsOutstanding
Total volume of FTRs outstanding (MWh)	45,196,000
Cash collateral posted		$ 47
Entergy Arkansas [Member]
Risk Management and Fair Values [Abstract]
Total volume of FTRs outstanding (MWh)	9,844,000
Entergy Gulf States Louisiana [Member]
Risk Management and Fair Values [Abstract]
Total volume of natural gas swaps outstanding (MMBtu)	8,740,000
Total volume of FTRs outstanding (MWh)	9,881,000
Entergy Louisiana [Member]
Risk Management and Fair Values [Abstract]
Total volume of natural gas swaps outstanding (MMBtu)	8,810,000
Total volume of FTRs outstanding (MWh)	10,691,000
Entergy Mississippi [Member]
Risk Management and Fair Values [Abstract]
Total volume of natural gas swaps outstanding (MMBtu)	3,230,000
Total volume of FTRs outstanding (MWh)	5,403,000
Entergy New Orleans [Member]
Risk Management and Fair Values [Abstract]
Total volume of natural gas swaps outstanding (MMBtu)	695,000
Total volume of FTRs outstanding (MWh)	3,633,000
Entergy Texas [Member]
Risk Management and Fair Values [Abstract]
Total volume of FTRs outstanding (MWh)	5,669,000
Maximum [Member]
Risk Management and Fair Values [Abstract]
Hedging the Variability in Future Cash Flow, Period	3 years