Income Taxes (Schedule Of Estimated Tax Attributes Carryovers And Their Expiration Dates) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Operating Loss Carryforwards [Line Items]
Capital losses, Carryover Amount	$ 20,549	$ 16,738
Federal [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards, Pre January 1, 2018	11,100,000
Operating losses, Carryover Amount	6,400,000
Federal [Member] | Entergy Arkansas [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Carryover Amount	4,200,000
Tax credits, Carryover Amount	0
Federal [Member] | Entergy Louisiana [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Carryover Amount	4,300,000
Tax credits, Carryover Amount	3,300
Federal [Member] | Entergy Mississippi [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Carryover Amount	1,800,000
Tax credits, Carryover Amount	0
Federal [Member] | Entergy New Orleans [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Carryover Amount	$ 1,000,000
Operating losses, Year(s) of expiration	Dec. 31, 2037
Tax credits, Carryover Amount	$ 0
Federal [Member] | Entergy Texas [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Carryover Amount	0
Tax credits, Carryover Amount	1,400
Federal [Member] | System Energy [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Carryover Amount	96,000
Tax credits, Carryover Amount	2,900
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Carryover Amount	20,400,000
State and Local Jurisdiction [Member] | Entergy Arkansas [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Carryover Amount	4,400,000
Tax credits, Carryover Amount	0
State and Local Jurisdiction [Member] | Entergy Louisiana [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Carryover Amount	5,100,000
Tax credits, Carryover Amount	0
State and Local Jurisdiction [Member] | Entergy Mississippi [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Carryover Amount	1,800,000
Tax credits, Carryover Amount	0
State and Local Jurisdiction [Member] | Entergy New Orleans [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Carryover Amount	$ 1,100,000
Operating losses, Year(s) of expiration	Dec. 31, 2037
Tax credits, Carryover Amount	$ 0
State and Local Jurisdiction [Member] | Entergy Texas [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Carryover Amount	0
Tax credits, Carryover Amount	$ 2,900
Tax Credit Carryforward, Expiration Date	Dec. 31, 2027
State and Local Jurisdiction [Member] | System Energy [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Carryover Amount	$ 190,000
Tax credits, Carryover Amount	9,600
Other Federal And State [Member]
Operating Loss Carryforwards [Line Items]
Tax credits, Carryover Amount	$ 115,600
Minimum [Member] | Federal [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Year(s) of expiration	Dec. 31, 2023
Minimum [Member] | Federal [Member] | Entergy Louisiana [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Year(s) of expiration	Dec. 31, 2035
Minimum [Member] | State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Year(s) of expiration	Dec. 31, 2019
Minimum [Member] | State and Local Jurisdiction [Member] | Entergy Louisiana [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Year(s) of expiration	Dec. 31, 2035
Minimum [Member] | State and Local Jurisdiction [Member] | System Energy [Member]
Operating Loss Carryforwards [Line Items]
Tax Credit Carryforward, Expiration Date	Dec. 31, 2019
Minimum [Member] | Other Federal And State [Member]
Operating Loss Carryforwards [Line Items]
Tax Credit Carryforward, Expiration Date	Dec. 31, 2019
Minimum [Member] | Other Federal [Member] | Entergy Louisiana [Member]
Operating Loss Carryforwards [Line Items]
Tax Credit Carryforward, Expiration Date	Dec. 31, 2035
Minimum [Member] | Other Federal [Member] | Entergy Texas [Member]
Operating Loss Carryforwards [Line Items]
Tax Credit Carryforward, Expiration Date	Dec. 31, 2029
Minimum [Member] | Other Federal [Member] | System Energy [Member]
Operating Loss Carryforwards [Line Items]
Tax Credit Carryforward, Expiration Date	Dec. 31, 2029
Maximum [Member] | Federal [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Year(s) of expiration	Dec. 31, 2037
Maximum [Member] | Federal [Member] | Entergy Louisiana [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Year(s) of expiration	Dec. 31, 2037
Maximum [Member] | State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Year(s) of expiration	Dec. 31, 2038
Maximum [Member] | State and Local Jurisdiction [Member] | Entergy Louisiana [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Year(s) of expiration	Dec. 31, 2037
Maximum [Member] | State and Local Jurisdiction [Member] | System Energy [Member]
Operating Loss Carryforwards [Line Items]
Tax Credit Carryforward, Expiration Date	Dec. 31, 2022
Maximum [Member] | Other Federal And State [Member]
Operating Loss Carryforwards [Line Items]
Tax Credit Carryforward, Expiration Date	Dec. 31, 2037
Maximum [Member] | Other Federal [Member] | Entergy Arkansas [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Year(s) of expiration	Dec. 31, 2023
Maximum [Member] | Other Federal [Member] | Entergy Louisiana [Member]
Operating Loss Carryforwards [Line Items]
Tax Credit Carryforward, Expiration Date	Dec. 31, 2037
Maximum [Member] | Other Federal [Member] | Entergy Mississippi [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Year(s) of expiration	Dec. 31, 2038
Maximum [Member] | Other Federal [Member] | Entergy Texas [Member]
Operating Loss Carryforwards [Line Items]
Tax Credit Carryforward, Expiration Date	Dec. 31, 2037
Maximum [Member] | Other Federal [Member] | System Energy [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Year(s) of expiration	Dec. 31, 2038
Tax Credit Carryforward, Expiration Date	Dec. 31, 2037