Revolving Credit Facilities, Lines Of Credit, Short-Term Borrowings, And Long-Term Debt (Narrative) (Details) - USD ($)		1 Months Ended					9 Months Ended
		Sep. 30, 2015	Jul. 31, 2015	Jun. 30, 2015	May. 31, 2015	Apr. 30, 2015	Sep. 30, 2015	Oct. 01, 2015
Debt Instrument [Line Items]
Amount of Facility		$ 3,500,000,000					$ 3,500,000,000
Issuance of letters of credit, percentage of total borrowing capacity							50.00%
Line of credit facility, commitment fee percentage							0.275%
Commercial Paper program limit		1,500,000,000.0					$ 1,500,000,000.0
Commercial Paper Amount Outstanding		664,000,000					664,000,000
Amount Drawn/ Outstanding		$ 525,000,000					$ 525,000,000
Commercial Paper Program [Member]
Debt Instrument [Line Items]
Debt, weighted average interest rate		0.90%					0.90%
Credit Facility [Member]
Debt Instrument [Line Items]
Debt, weighted average interest rate		1.94%					1.94%
Entergy Arkansas [Member]
Debt Instrument [Line Items]
Authorized Short Term Borrowings		$ 250,000,000					$ 250,000,000
Issuance of letters of credit, percentage of total borrowing capacity							50.00%
Consolidated debt ratio							65.00%
Entergy Gulf States Louisiana [Member]
Debt Instrument [Line Items]
Issuance of letters of credit, percentage of total borrowing capacity							50.00%
Consolidated debt ratio							65.00%
Entergy Louisiana [Member]
Debt Instrument [Line Items]
Authorized Short Term Borrowings		250,000,000					$ 250,000,000
Issuance of letters of credit, percentage of total borrowing capacity							50.00%
Letters of Credit Outstanding, Amount		3,000,000					$ 3,000,000
Consolidated debt ratio							65.00%
Entergy Mississippi [Member]
Debt Instrument [Line Items]
Authorized Short Term Borrowings		175,000,000					$ 175,000,000
Consolidated debt ratio							65.00%
Entergy Texas [Member]
Debt Instrument [Line Items]
Authorized Short Term Borrowings		200,000,000					$ 200,000,000
Issuance of letters of credit, percentage of total borrowing capacity							50.00%
Letters of Credit Outstanding, Amount		1,300,000					$ 1,300,000
Consolidated debt ratio							65.00%
Entergy Texas [Member] | Five Point One Five Percent First Mortgage Bond Due June Two Thousand Twenty Five [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage					5.15%
Issuance Of Debt					$ 250,000,000
Entergy Texas [Member] | Three Point Six Zero Percent Series First Mortgage Bonds Due June Two Thousand Fifteen [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage				3.60%
Redemption of debt instrument				$ 200,000,000
System Energy [Member]
Debt Instrument [Line Items]
Authorized Short Term Borrowings		200,000,000					$ 200,000,000
System Energy [Member] | Five Point Three Three Percent Series G Notes Due April Two Thousand Fifteen [Member]
Debt Instrument [Line Items]
Redemption of debt instrument						$ 60,000,000
System Energy [Member] | Five Point Eight Seven Five Percent Governmental Bonds Due 2022 [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage					5.875%
Redemption of debt instrument					$ 35,000,000
Debt Instrument, Face Amount					216,000,000
Entergy Nuclear Vermont Yankee [Member]
Debt Instrument [Line Items]
Amount of Facility		60,000,000					$ 60,000,000
Line of credit facility, commitment fee percentage							0.25%
Line of Credit Facility, Interest Rate During Period							1.94%
Uncommitted Credit Facility		85,000,000					$ 85,000,000
Entergy New Orleans [Member]
Debt Instrument [Line Items]
Authorized Short Term Borrowings		100,000,000					$ 100,000,000
Line of credit facility, commitment fee percentage							1.50%
Consolidated debt ratio							65.00%
Amount of Hurricane Issac storm cost to be recovered through securitization					31,800,000
Replenishment amount for storm reserve spending					63,900,000
Up Front Financing Costs On Issuance Of Bonds To Recover Storm Damage Restoration Costs					$ 3,000,000
Issuance Of Debt			$ 98,700,000
Entergy New Orleans [Member] | Tranche A One Two Point Six Seven Percent Due June Two Thousand Twenty Seven [Member]
Debt Instrument [Line Items]
Coupon Rate Of Storm Cost Recovery Bonds			2.67%
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months		11,400,000					$ 11,400,000
Long-term Debt, Maturities, Repayments of Principal in Year Two		10,600,000					10,600,000
Long-term Debt, Maturities, Repayments of Principal in Year Three		11,000,000					11,000,000
Long-term Debt, Maturities, Repayments of Principal in Year Four		11,200,000					11,200,000
Long-term Debt, Maturities, Repayments of Principal in Year Five		11,600,000					$ 11,600,000
System Energy VIE [Member]
Debt Instrument [Line Items]
Line of credit facility commitment fee as a percentage of undrawn commitment amount							0.125%
Consolidated debt ratio of total capitalization							70.00%
Amount Drawn/ Outstanding		$ 14,600,000					$ 14,600,000
System Energy VIE [Member] | Three Point Seven Eight Percent Series I Notes Due October Two Thousand Eighteen [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage		3.78%					3.78%
System Energy VIE [Member] | Five Point Three Three Percent Series G Notes Due April Two Thousand Fifteen [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage						5.33%
Entergy Arkansas VIE [Member]
Debt Instrument [Line Items]
Line of credit facility commitment fee as a percentage of undrawn commitment amount							0.125%
Consolidated debt ratio of total capitalization							70.00%
Amount Drawn/ Outstanding		$ 37,200,000					$ 37,200,000
Entergy Arkansas VIE [Member] | Three Point Six Five Percent Series L Notes Due July Two Thousand Twenty One [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage		3.65%					3.65%
Entergy Louisiana VIE [Member]
Debt Instrument [Line Items]
Line of credit facility commitment fee as a percentage of undrawn commitment amount							0.10%
Consolidated debt ratio of total capitalization							70.00%
Amount Drawn/ Outstanding		$ 66,700,000					$ 66,700,000
Entergy Louisiana VIE [Member] | Three Point Nine Two Percent Series H Dues February Two Thousand Twenty One [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage		3.92%					3.92%
Entergy Gulf States Louisiana VIE [Member]
Debt Instrument [Line Items]
Line of credit facility commitment fee as a percentage of undrawn commitment amount							0.10%
Consolidated debt ratio of total capitalization							70.00%
Amount Drawn/ Outstanding		$ 16,400,000					$ 16,400,000
Entergy Corporation [Member] | Four Point Zero Percent Series Senior Notes [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage			4.00%
Issuance Of Debt			$ 650,000,000
Entergy Corporation [Member] | Three Point Six Two Five Percent Series Senior Notes [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage		3.625%					3.625%
Redemption of debt instrument		$ 550,000,000
Maximum [Member]
Debt Instrument [Line Items]
Line of credit facility, commitment fee percentage							0.275%
Consolidated debt ratio							65.00%
Minimum [Member]
Debt Instrument [Line Items]
Line of credit facility, commitment fee percentage							0.125%
Credit Facility Of One Hundred And Fifty Million [Member] | Entergy Arkansas [Member]
Debt Instrument [Line Items]
Amount of Facility	[1]	150,000,000					$ 150,000,000
Line of Credit Facility, Interest Rate During Period	[2]						1.69%
Amount Drawn/ Outstanding		0					$ 0
Credit Facility Of One Hundred And Fifty Million [Member] | Entergy Gulf States Louisiana [Member]
Debt Instrument [Line Items]
Amount of Facility	[3]	150,000,000					$ 150,000,000
Line of Credit Facility, Interest Rate During Period	[2]						3.50%
Amount Drawn/ Outstanding		35,000,000					$ 35,000,000
Credit Facility Of One Hundred And Fifty Million [Member] | Entergy Texas [Member]
Debt Instrument [Line Items]
Amount of Facility	[4]	150,000,000					$ 150,000,000
Line of Credit Facility, Interest Rate During Period	[2]						1.69%
Amount Drawn/ Outstanding		$ 0					$ 0
Subsequent Event [Member] | Entergy Louisiana [Member]
Debt Instrument [Line Items]
Authorized Short Term Borrowings								$ 450,000,000
Amount of Facility								350,000,000
Uncommitted Credit Facility								$ 125,000,000

[1] The credit facility allows Entergy Arkansas to issue letters of credit against 50% of the borrowing capacity of the facility. As of September 30, 2015, no letters of credit were outstanding.

[2] The interest rate is the rate as of September 30, 2015 that would most likely apply to outstanding borrowings under the facility.

[3] The credit facility allows Entergy Gulf States Louisiana to issue letters of credit against 50% of the borrowing capacity of the facility. As of September 30, 2015, no letters of credit were outstanding.

[4] The credit facility allows Entergy Texas to issue letters of credit against 50% of the borrowing capacity of the facility. As of September 30, 2015, $1.3 million in letters of credit were outstanding.