Revolving Credit Facilities, Lines Of Credit And Short-Term Borrowings (Credit Facilities) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($)
Line of credit facility, maximum borrowing capacity	$ 3,500,000
Amount Drawn/ Outstanding	$ 835,000
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	Aug. 01, 2020
Line of credit facility, maximum borrowing capacity	$ 150,000
Interest Rate	1.92%
Amount Drawn/ Outstanding	$ 0
Letters of Credit Outstanding, Amount	$ 0
Entergy Arkansas [Member] | Credit Facility Of Twenty Million [Member]
Expiration Date	Apr. 01, 2016
Line of credit facility, maximum borrowing capacity	$ 20,000
Interest Rate	1.92%
Amount Drawn/ Outstanding	$ 0
Letters of Credit Outstanding, Amount	$ 0
Entergy Louisiana [Member]
Issuance of letters of credit, percentage of total borrowing capacity	50.00%
Entergy Louisiana [Member] | Credit Facility Of Three Hundred and Fifty Million [Member]
Expiration Date	Aug. 01, 2020
Line of credit facility, maximum borrowing capacity	$ 350,000
Interest Rate	1.67%
Amount Drawn/ Outstanding	$ 0
Letters of Credit Outstanding, Amount	$ 3,100
Entergy Mississippi [Member] | Credit Facility Of Thirty Five Million [Member]
Expiration Date	May 01, 2016
Line of credit facility, maximum borrowing capacity	$ 35,000
Interest Rate	1.92%
Letters of Credit Outstanding, Amount	$ 0
Entergy Mississippi [Member] | Credit Facility Of Twenty Million [Member]
Expiration Date	May 01, 2016
Line of credit facility, maximum borrowing capacity	$ 20,000
Interest Rate	1.92%
Amount Drawn/ Outstanding	$ 0
Letters of Credit Outstanding, Amount	$ 0
Entergy Mississippi [Member] | Credit Facility Of Ten Million [Member]
Expiration Date	May 01, 2016
Line of credit facility, maximum borrowing capacity	$ 10,000
Interest Rate	1.92%
Amount Drawn/ Outstanding	$ 0
Letters of Credit Outstanding, Amount	$ 0
Entergy Mississippi [Member] | Credit Facility Of Thirty Seven Point Five Million [Member]
Expiration Date	May 01, 2016
Line of credit facility, maximum borrowing capacity	$ 37,500
Interest Rate	1.92%
Amount Drawn/ Outstanding	$ 0
Letters of Credit Outstanding, Amount	$ 0
Entergy Texas [Member]
Issuance of letters of credit, percentage of total borrowing capacity	50.00%
Entergy Texas [Member] | Credit Facility Of One Hundred And Fifty Million [Member]
Expiration Date	Aug. 01, 2020
Line of credit facility, maximum borrowing capacity	$ 150,000
Interest Rate	1.92%
Amount Drawn/ Outstanding	$ 0
Letters of Credit Outstanding, Amount	$ 1,300
Entergy New Orleans [Member] | Credit Facility Of Twenty Five Million [Member]
Expiration Date	Nov. 01, 2018
Line of credit facility, maximum borrowing capacity	$ 25,000
Interest Rate	2.17%
Amount Drawn/ Outstanding	$ 0
Letters of Credit Outstanding, Amount	$ 0