Revolving Credit Facilities, Lines Of Credit And Short-Term Borrowings (Credit Facilities) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014
Line of credit facility, maximum borrowing capacity	$ 3,500,000,000
Amount Drawn/ Outstanding	695,000,000
Issuance of letters of credit, percentage of total borrowing capacity	50.00%
Entergy Arkansas [Member]
Issuance of letters of credit, percentage of total borrowing capacity	50.00%
Entergy Arkansas [Member] | Credit Facility Of One Hundred And Fifty Million [Member]
Expiration Date	Mar. 01, 2019
Line of credit facility, maximum borrowing capacity	150,000,000
Interest Rate	1.67%
Amount Drawn/ Outstanding	0
Entergy Arkansas [Member] | Credit Facility Of Twenty Million [Member]
Expiration Date	Apr. 01, 2015
Line of credit facility, maximum borrowing capacity	20,000,000
Interest Rate	1.67%
Amount Drawn/ Outstanding	0
Entergy Gulf States Louisiana [Member]
Issuance of letters of credit, percentage of total borrowing capacity	50.00%
Entergy Gulf States Louisiana [Member] | Credit Facility Of One Hundred And Fifty Million [Member]
Expiration Date	Mar. 01, 2019
Line of credit facility, maximum borrowing capacity	150,000,000
Interest Rate	1.42%
Amount Drawn/ Outstanding	0
Entergy Louisiana [Member]
Issuance of letters of credit, percentage of total borrowing capacity	50.00%
Entergy Louisiana [Member] | Credit Facility Of Two Hundred Million [Member]
Expiration Date	Mar. 01, 2019
Line of credit facility, maximum borrowing capacity	200,000,000
Interest Rate	1.42%
Amount Drawn/ Outstanding	0
Entergy Mississippi [Member] | Credit Facility Of Thirty Five Million [Member]
Expiration Date	May 01, 2015
Line of credit facility, maximum borrowing capacity	35,000,000
Interest Rate	1.67%
Entergy Mississippi [Member] | Credit Facility Of Twenty Million [Member]
Expiration Date	May 01, 2015
Line of credit facility, maximum borrowing capacity	20,000,000
Interest Rate	1.67%
Amount Drawn/ Outstanding	0
Entergy Mississippi [Member] | Credit Facility Of Ten Million [Member]
Expiration Date	May 01, 2015
Line of credit facility, maximum borrowing capacity	10,000,000
Interest Rate	1.67%
Amount Drawn/ Outstanding	0
Entergy Mississippi [Member] | Credit Facility Of Thirty Seven Point Five Million [Member]
Expiration Date	May 01, 2015
Line of credit facility, maximum borrowing capacity	37,500,000
Interest Rate	1.67%
Amount Drawn/ Outstanding	0
Entergy Texas [Member]
Issuance of letters of credit, percentage of total borrowing capacity	50.00%
Letters of Credit Outstanding, Amount	1,300,000
Entergy Texas [Member] | Credit Facility Of One Hundred And Fifty Million [Member]
Expiration Date	Mar. 01, 2019
Line of credit facility, maximum borrowing capacity	150,000,000
Interest Rate	1.67%
Amount Drawn/ Outstanding	0
Entergy New Orleans [Member] | Credit Facility Of Twenty Five Million [Member]
Expiration Date	Nov. 01, 2015
Line of credit facility, maximum borrowing capacity	25,000,000
Interest Rate	1.92%
Amount Drawn/ Outstanding	$ 0