Revolving Credit Facilities, Lines Of Credit, Short-Term Borrowings, And Long-Term Debt (Credit Facilities) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Amount of Facility	$ 3,500,000
Amount Drawn/ Outstanding	225,000
Entergy Arkansas [Member]
Letters of Credit Outstanding, Amount	$ 200	$ 300
Entergy Arkansas [Member] | Credit Facility Of One Hundred And Fifty Million [Member]
Expiration Date	Aug. 14, 2021
Amount of Facility	$ 150,000
Interest Rate	2.23%
Amount Drawn/ Outstanding	$ 0
Letters of Credit Outstanding, Amount	$ 0
Entergy Arkansas [Member] | Credit Facility Of Twenty Million [Member]
Expiration Date	Apr. 30, 2017
Amount of Facility	$ 20,000
Interest Rate	2.23%
Amount Drawn/ Outstanding	$ 0
Letters of Credit Outstanding, Amount	$ 0
Entergy Louisiana [Member] | Credit Facility Of Three Hundred Fifty Million [Member]
Expiration Date	Aug. 14, 2021
Amount of Facility	$ 350,000
Interest Rate	2.23%
Amount Drawn/ Outstanding	$ 0
Letters of Credit Outstanding, Amount	3,400
Entergy Mississippi [Member]
Letters of Credit Outstanding, Amount	$ 100	$ 100
Entergy Mississippi [Member] | Credit Facility Of Thirty Seven Point Five Million [Member]
Expiration Date	May 31, 2017
Amount of Facility	$ 37,500
Interest Rate	2.48%
Amount Drawn/ Outstanding	$ 0
Letters of Credit Outstanding, Amount	$ 0
Entergy Mississippi [Member] | Credit Facility Of Thirty Five Million [Member]
Expiration Date	May 31, 2017
Amount of Facility	$ 35,000
Interest Rate	2.48%
Amount Drawn/ Outstanding	$ 0
Letters of Credit Outstanding, Amount	$ 0
Entergy Mississippi [Member] | Credit Facility Of Twenty Million [Member]
Expiration Date	May 31, 2017
Amount of Facility	$ 20,000
Interest Rate	2.48%
Amount Drawn/ Outstanding	$ 0
Letters of Credit Outstanding, Amount	$ 0
Entergy Mississippi [Member] | Credit Facility Of Ten Million [Member]
Expiration Date	May 31, 2017
Amount of Facility	$ 10,000
Interest Rate	2.48%
Amount Drawn/ Outstanding	$ 0
Letters of Credit Outstanding, Amount	$ 0
Entergy New Orleans [Member] | Credit Facility Of Twenty Five Million [Member]
Expiration Date	Nov. 20, 2018
Amount of Facility	$ 25,000
Interest Rate	2.46%
Amount Drawn/ Outstanding	$ 0
Letters of Credit Outstanding, Amount	$ 800
Entergy Texas [Member] | Credit Facility Of One Hundred And Fifty Million [Member]
Expiration Date	Aug. 14, 2021
Amount of Facility	$ 150,000
Interest Rate	2.48%
Amount Drawn/ Outstanding	$ 0
Letters of Credit Outstanding, Amount	$ 4,700