Revolving Credit Facilities, Lines Of Credit And Short-Term Borrowings (Narrative) (Details) (USD $)	9 Months Ended			9 Months Ended	1 Months Ended			1 Months Ended			9 Months Ended	1 Months Ended	9 Months Ended	1 Months Ended		9 Months Ended	1 Months Ended			9 Months Ended	1 Months Ended		1 Months Ended	9 Months Ended	1 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2014 Commercial Paper Program [Member]	Sep. 30, 2014 Credit Facility [Member]	Sep. 30, 2014 Entergy Arkansas [Member]	Mar. 31, 2014 Entergy Arkansas [Member] Term Loan [Member]	Mar. 31, 2014 Entergy Arkansas [Member] Three Point Seven Zero Percent Series First Mortgage Bonds Due June Two Thousand Twenty Four [Member]	Sep. 30, 2014 Entergy Arkansas [Member] Three Point Seven Zero Percent Series First Mortgage Bonds Due June Two Thousand Twenty Four [Member]	Jul. 31, 2014 Entergy Arkansas [Member] Three Point Six Five Percent Series L Notes Due July Two Thousand Twenty One [Member]	Apr. 30, 2014 Entergy Arkansas [Member] Five Point Zero Percent Series First Mortgage Bonds Due July Two Thousand Eighteen [Member]	Jul. 31, 2014 Entergy Arkansas [Member] Five Point Six Nine Percent Series I Notes Due July Two Thousand Fourteen [Member]	Sep. 30, 2014 Entergy Gulf States Louisiana [Member]	Jul. 31, 2014 Entergy Gulf States Louisiana [Member] Three Point Seven Eight Percent Series First Mortgage Bonds Due April Two Thousand Twenty Five [Member]	Sep. 30, 2014 Entergy Louisiana [Member]	Jul. 31, 2014 Entergy Louisiana [Member] Three Point Seven Eight Percent Series First Mortgage Bonds Due April Two Thousand Twenty Five [Member]	Feb. 28, 2014 Entergy Louisiana [Member] Three Point Nine Two Percent Series H Dues February Two Thousand Twenty One [Member]	Sep. 30, 2014 Entergy Louisiana [Member] Five Point Zero Percent Series First Mortgage Bonds Due July Two Thousand Forty Four [Member]	Jul. 31, 2014 Entergy Louisiana [Member] Mortgage Bonds Six Point Four Percent Series Due October Two Thousand Thirty Four [Member]	Jul. 31, 2014 Entergy Louisiana [Member] Mortgage Bonds Six Point Three Percent Series Due September Two Thousand Thirty Five [Member]	Jul. 31, 2014 Entergy Louisiana [Member] Five Point Six Nine Percent Series E Notes Due July Two Thousand Fourteen [Member]	Sep. 30, 2014 Entergy Mississippi [Member]	Mar. 31, 2014 Entergy Mississippi [Member] Three Point Seven Five Percent Series First Mortgage Bonds Due July Two Thousand Twenty Four [Member]	Sep. 30, 2014 Entergy Mississippi [Member] Three Point Seven Five Percent Series First Mortgage Bonds Due July Two Thousand Twenty Four [Member]	Apr. 30, 2014 Entergy Mississippi [Member] Four Point Nine Five Percent Series First Mortgage Bonds Due June Two Thousand Eighteen [Member]	Sep. 30, 2014 Entergy Texas [Member]	May 31, 2014 Entergy Texas [Member] Five Point Six Two Five Percent Series First Mortgage Bonds Due June Two Thousand Sixty Four [Member]	May 31, 2014 Entergy Texas [Member] Mortgage Bonds Seven Point Eight Seven Five Percent Series Due June Two Thousand Thirty Nine [Member]	Sep. 30, 2014 System Energy [Member]	Sep. 30, 2014 Entergy New Orleans [Member]	Sep. 30, 2014 Maximum [Member]	Sep. 30, 2014 Minimum [Member]	Sep. 30, 2014 Credit Facility Of One Hundred And Fifty Million [Member] Entergy Arkansas [Member]		Sep. 30, 2014 Credit Facility Of One Hundred And Fifty Million [Member] Entergy Gulf States Louisiana [Member]		Sep. 30, 2014 Credit Facility Of One Hundred And Fifty Million [Member] Entergy Texas [Member]
Debt Instrument [Line Items]
Amount of Facility	$ 3,500,000,000																														$ 150,000,000	[1]	$ 150,000,000	[2]	$ 150,000,000	[3]
Issuance of letters of credit, percentage of total borrowing capacity	50.00%			50.00%							50.00%		50.00%											50.00%
Letters of Credit Outstanding, Amount											17,900,000		16,400,000											31,400,000				11,800,000			4,000,000
Line of credit facility, commitment fee percentage	0.275%																			1.50%								1.50%	0.275%	0.125%
Debt, weighted average interest rate		0.89%	1.91%
Consolidated debt ratio				65.00%							65.00%		65.00%							65.00%				65.00%				65.00%	65.00%
Commercial Paper program limit	1,500,000,000.0
Commercial Paper Amount Outstanding	776,000,000
Line of credit facility commitment fee as a percentage of undrawn commitment amount				0.125%							0.10%		0.10%														0.125%
Debt instrument, interest rate, stated percentage							3.70%	3.65%	5.00%	5.69%		3.78%		3.78%	3.92%	5.00%	6.40%	6.30%	5.69%			3.75%	4.95%		5.63%	7.88%
Issuance Of Debt						375,000,000		90,000,000				110,000,000		190,000,000	40,000,000	170,000,000					100,000,000				135,000,000
Repayments of debt					250,000,000				115,000,000	70,000,000							70,000,000	100,000,000	50,000,000				95,000,000			150,000,000
Consolidated debt ratio of total capitalization				70.00%							70.00%		70.00%														70.00%
Amount Drawn/ Outstanding	$ 245,000,000																			$ 21,800,000											$ 0		$ 0		$ 0

[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, 2014, $4 million in letters of credit were outstanding.

[2] 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, 2014, $17.9 million in letters of credit were outstanding.

[3] The credit facility allows Entergy Texas to issue letters of credit against 50% of the borrowing capacity of the facility. As of September 30, 2014, $31.4 million in letters of credit were outstanding.