Income Taxes (Schedule Of Estimated Tax Attributes Carryovers And Their Expiration Dates) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Operating Loss Carryforwards [Line Items]
Capital losses, Carryover Amount	$ 11,075	$ 12,146
Federal [Member] | Parent Company [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Carryover Amount	3,600,000
Federal [Member] | Entergy Arkansas [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Carryover Amount	7,000
Tax credits, Carryover Amount	1,000
Federal [Member] | Entergy Louisiana [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Carryover Amount	2,400,000
Tax credits, Carryover Amount	0
Federal [Member] | Entergy Mississippi [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Carryover Amount	0
Tax credits, Carryover Amount	1,000
Federal [Member] | Entergy New Orleans [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Carryover Amount	0
Tax credits, Carryover Amount	0
Federal [Member] | Entergy Texas [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Carryover Amount	0
Tax credits, Carryover Amount	0
Federal [Member] | System Energy [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Carryover Amount	242,000
Tax credits, Carryover Amount	1,000
State and Local Jurisdiction [Member] | Parent Company [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Carryover Amount	5,200,000
State and Local Jurisdiction [Member] | Entergy Arkansas [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Carryover Amount	0
Tax credits, Carryover Amount	0
State and Local Jurisdiction [Member] | Entergy Louisiana [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Carryover Amount	2,500,000
Tax credits, Carryover Amount	0
State and Local Jurisdiction [Member] | Entergy Mississippi [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Carryover Amount	0
Tax credits, Carryover Amount	0
State and Local Jurisdiction [Member] | Entergy New Orleans [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Carryover Amount	6,000
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	3,300
State and Local Jurisdiction [Member] | System Energy [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Carryover Amount	833,000
Tax credits, Carryover Amount	6,000
Other Federal And State [Member]
Operating Loss Carryforwards [Line Items]
Tax credits, Carryover Amount	$ 77,900
Minimum [Member] | Federal [Member] | Parent Company [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Year(s) of expiration	Dec. 31, 2023
Minimum [Member] | Federal [Member] | Entergy Arkansas [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Year(s) of expiration	Dec. 31, 2030
Minimum [Member] | Federal [Member] | System Energy [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Year(s) of expiration	Dec. 31, 2030
Minimum [Member] | State and Local Jurisdiction [Member] | Parent Company [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Year(s) of expiration	Dec. 31, 2016
Minimum [Member] | State and Local Jurisdiction [Member] | System Energy [Member]
Operating Loss Carryforwards [Line Items]
Tax credits, Year(s) of expiration	2017
Minimum [Member] | Other Federal And State [Member]
Operating Loss Carryforwards [Line Items]
Tax credits, Year(s) of expiration	2016
Minimum [Member] | Other Federal [Member] | Entergy Arkansas [Member]
Operating Loss Carryforwards [Line Items]
Tax credits, Year(s) of expiration	2029
Minimum [Member] | Other Federal [Member] | Entergy Mississippi [Member]
Operating Loss Carryforwards [Line Items]
Tax credits, Year(s) of expiration	2029
Minimum [Member] | Other Federal [Member] | System Energy [Member]
Operating Loss Carryforwards [Line Items]
Tax credits, Year(s) of expiration	2029
Maximum [Member] | Federal [Member] | Parent Company [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Year(s) of expiration	Dec. 31, 2035
Maximum [Member] | Federal [Member] | Entergy Arkansas [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Year(s) of expiration	Dec. 31, 2035
Maximum [Member] | Federal [Member] | Entergy Louisiana [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Year(s) of expiration	Dec. 31, 2035
Maximum [Member] | Federal [Member] | System Energy [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Year(s) of expiration	Dec. 31, 2035
Maximum [Member] | State and Local Jurisdiction [Member] | Parent Company [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Year(s) of expiration	Dec. 31, 2035
Maximum [Member] | State and Local Jurisdiction [Member] | Entergy Louisiana [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Year(s) of expiration	Dec. 31, 2035
Maximum [Member] | State and Local Jurisdiction [Member] | Entergy New Orleans [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Year(s) of expiration	Dec. 31, 2032
Maximum [Member] | State and Local Jurisdiction [Member] | Entergy Texas [Member]
Operating Loss Carryforwards [Line Items]
Tax credits, Year(s) of expiration	2026
Maximum [Member] | State and Local Jurisdiction [Member] | System Energy [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Year(s) of expiration	Dec. 31, 2035
Tax credits, Year(s) of expiration	2020
Maximum [Member] | Other Federal And State [Member]
Operating Loss Carryforwards [Line Items]
Tax credits, Year(s) of expiration	2035
Maximum [Member] | Other Federal [Member] | Entergy Arkansas [Member]
Operating Loss Carryforwards [Line Items]
Tax credits, Year(s) of expiration	2033
Maximum [Member] | Other Federal [Member] | Entergy Mississippi [Member]
Operating Loss Carryforwards [Line Items]
Tax credits, Year(s) of expiration	2034
Maximum [Member] | Other Federal [Member] | System Energy [Member]
Operating Loss Carryforwards [Line Items]
Tax credits, Year(s) of expiration	2033