Revolving Credit Facilities, Lines Of Credit And Short-Term Borrowings (Credit Facilities) (Details) (USD $)	3 Months Ended		3 Months Ended
	Mar. 31, 2012	Apr. 30, 2012 Entergy Arkansas [Member]	Mar. 31, 2012 Entergy Arkansas [Member] Credit Facility Of Twenty Million [Member]	Mar. 31, 2012 Entergy Arkansas [Member] Credit Facility Of One Hundred Fifty Million [Member]		Mar. 31, 2012 Entergy Arkansas [Member] Credit Facility Of Seventy Eight Million [Member]		Mar. 31, 2012 Entergy Gulf States Louisiana [Member]		Mar. 31, 2012 Entergy Louisiana [Member]		Mar. 31, 2012 Entergy Mississippi [Member] Credit Facility Of Thirty Five Million [Member]		Mar. 31, 2012 Entergy Mississippi [Member] Credit Facility Of Twenty Five Million [Member]		Mar. 31, 2012 Entergy Mississippi [Member] Credit Facility Of Ten Million [Member]		Mar. 31, 2012 Entergy Texas [Member]		Mar. 31, 2012 Maximum [Member] Entergy Arkansas [Member]	Mar. 31, 2012 Maximum [Member] Entergy Gulf States Louisiana [Member]	Mar. 31, 2012 Maximum [Member] Entergy Louisiana [Member]	Mar. 31, 2012 Maximum [Member] Entergy Mississippi [Member]	Mar. 31, 2012 Maximum [Member] Entergy Texas [Member]
Expiration Date	March 2017		April 2013	March 2017		April 2012		March 2017		March 2017		May 2012		May 2012		May 2012		March 2017
Amount of Facility	$ 3,500,000,000	$ 20,000,000		$ 150,000,000	[1]	$ 78,000,000	[2]	$ 150,000,000	[3]	$ 200,000,000	[4]	$ 35,000,000	[4]	$ 25,000,000	[4]	$ 10,000,000	[5]	$ 150,000,000
Interest Rate				1.74%	[6]	3.25%	[6]	1.74%	[6]	1.74%	[6]	1.99%	[6]	1.99%	[6]	1.99%	[6]	1.99%	[6]
Amount Drawn/ Outstanding	$ 1,465,000,000
Debt ratio																				65.00%	65.00%	65.00%	65.00%	65.00%

[1] The credit facility allows Entergy Arkansas to issue letters of credit against 50% of the borrowing capacity of the facility. As of March 31, 2012, no letters of credit were outstanding. The credit facility requires Entergy Arkansas to maintain a consolidated debt ratio of 65% or less of its total capitalization.

[2] The credit facility requires Entergy Arkansas to maintain a debt ratio of 65% or less of its total capitalization. Borrowings under the Entergy Arkansas credit facility may be secured by a security interest in its accounts receivable. In April 2012, at the expiration of this facility, Entergy Arkansas entered into a new $20 million credit facility that expires in April 2013.

[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 March 31, 2012, no letters of credit were outstanding. The credit facility requires Entergy Gulf States Louisiana to maintain a consolidated debt ratio of 65% or less of its total capitalization.

[4] The credit facility allows Entergy Louisiana to issue letters of credit against 50% of the borrowing capacity of the facility. As of March 31, 2012, no letters of credit were outstanding. The credit facility requires Entergy Louisiana to maintain a consolidated debt ratio of 65% or less of its total capitalization.

[5] Borrowings under the Entergy Mississippi credit facilities may be secured by a security interest in its accounts receivable. Entergy Mississippi is required to maintain a consolidated debt ratio of 65% or less of its total capitalization. Prior to expiration on May 31, 2012, Entergy Mississippi expects to renew all of its credit facilities.

[6] The interest rate is the rate as of March 31, 2012 that would be applied to outstanding borrowings under the facility.