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

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- Definition

Dollar amount of hedge contract in a liability position.

+ References

No definition available.

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- Definition

Maximum length of time over which Company is currently hedging the variability in future cash flows with derivatives for forecasted power transactions.

+ References

No definition available.

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- Definition

Number of Derivative Contract Counterparties in a Liability Position

+ References

No definition available.

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- Definition

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

+ References

No definition available.

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- Definition

Planned generation sold forward from non utility nuclear power plants for the remainder of the period

+ References

No definition available.

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- Definition

Total planned generation for remainder of the period

+ References

No definition available.

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- Definition

Volume of Fixed Transmission Rights Outstanding

+ References

No definition available.

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- Definition

Total volume of natural gas swaps outstanding.

+ References

No definition available.

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- Definition

Carrying amount as of the balance sheet date of cash collateral held for borrowed securities, for which the cash is restricted as to withdrawal or usage.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.1)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.(a),2)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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- 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=35736893&loc=d3e80748-113994

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- 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=56946850&loc=SL5624258-113959

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- 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=56946850&loc=SL5624171-113959

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- 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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Risk Management and Fair Values (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015 counterparty MWh MMBTU	Mar. 31, 2014 counterparty	Dec. 31, 2014
Risk Management and Fair Values [Abstract]
Cash collateral posted	$ 1	$ 64
Cash flow hedges relating to power sales as part of net unrealized gains	111
Reclassified from accumulated other comprehensive income (OCI) to operating revenues	88
Number of Derivative Contract Counterparties in a Liability Position	2	9
Maturity of cash flow hedges, Tax	5	(68)
Maximum length of time over which Company is currently hedging the variability in future cash flows for forecasted power transactions, years	3 years
Planned generation sold forward from non utility nuclear power plants for the remainder of the period	87.00%
Planned Generation Sold Forward under financial derivatives	63.00%
Total planned generation for remainder of the period	27,000,000
Total volume of natural gas swaps outstanding (MMBtu)	44,080,000etr_VolumeOfNaturalGasSwapsOutstanding
Total volume of fixed transmission rights outstanding	18,332,000
Change in cash flow hedges due to ineffectiveness	(1)	1
Dollar amount of hedge contract in a liability position	14etr_HedgeContractsInLiabilityPosition	98etr_HedgeContractsInLiabilityPosition
Entergy Arkansas [Member]
Risk Management and Fair Values [Abstract]
Total volume of fixed transmission rights outstanding	4,010,000
Entergy Gulf States Louisiana [Member]
Risk Management and Fair Values [Abstract]
Total volume of natural gas swaps outstanding (MMBtu)	16,610,000
Total volume of fixed transmission rights outstanding	4,060,000
Entergy Louisiana [Member]
Risk Management and Fair Values [Abstract]
Total volume of natural gas swaps outstanding (MMBtu)	20,190,000
Total volume of fixed transmission rights outstanding	4,358,000
Entergy Mississippi [Member]
Risk Management and Fair Values [Abstract]
Total volume of natural gas swaps outstanding (MMBtu)	7,280,000
Total volume of fixed transmission rights outstanding	2,031,000
Entergy New Orleans [Member]
Risk Management and Fair Values [Abstract]
Total volume of fixed transmission rights outstanding	1,478,000
Entergy Texas [Member]
Risk Management and Fair Values [Abstract]
Total volume of fixed transmission rights outstanding	2,276,000
Utility and Entergy Wholesale Commodities [Member] \| Electricity Swaps And Options And Fixed Transmission Rights [Member]
Risk Management and Fair Values [Abstract]
Cash Collateral for Borrowed Securities			25
Cash collateral posted	$ 1