Income Taxes (Schedule Of Estimated Tax Attributes Carryovers And Their Expiration Dates) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Operating Loss Carryforwards [Line Items]
Capital losses, Carryover Amount	$ 12,146,000	$ 13,140,000
Federal [Member] | Parent Company [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Carryover Amount	12,300,000,000
Federal [Member] | Entergy Arkansas [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Carryover Amount	1,300,000,000
Tax credits, Carryover Amount	1,000,000
Federal [Member] | Entergy Gulf States Louisiana [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Carryover Amount	151,000,000
Tax credits, Carryover Amount	6,000,000
Federal [Member] | Entergy Louisiana [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Carryover Amount	2,100,000,000
Tax credits, Carryover Amount	13,000,000
Federal [Member] | Entergy Mississippi [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Carryover Amount	0
Tax credits, Carryover Amount	1,000,000
Federal [Member] | Entergy New Orleans [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Carryover Amount	55,000,000
Tax credits, Carryover Amount	0
Federal [Member] | Entergy Texas [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Carryover Amount	0
Federal [Member] | System Energy [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Carryover Amount	392,000,000
Tax credits, Carryover Amount	10,000,000
State and Local Jurisdiction [Member] | Parent Company [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Carryover Amount	10,200,000,000
State and Local Jurisdiction [Member] | Entergy Arkansas [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Carryover Amount	235,000,000
State and Local Jurisdiction [Member] | Entergy Gulf States Louisiana [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Carryover Amount	580,000,000
State and Local Jurisdiction [Member] | Entergy Louisiana [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Carryover Amount	3,000,000,000
State and Local Jurisdiction [Member] | Entergy Mississippi [Member]
Operating Loss Carryforwards [Line Items]
Tax credits, Carryover Amount	9,500,000
State and Local Jurisdiction [Member] | Entergy New Orleans [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Carryover Amount	24,000,000
State and Local Jurisdiction [Member] | Entergy Texas [Member]
Operating Loss Carryforwards [Line Items]
Tax credits, Carryover Amount	3,400,000
Tax credits, Year(s) of expiration	2026
State and Local Jurisdiction [Member] | System Energy [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Carryover Amount	0
Tax credits, Carryover Amount	15,700,000
Other Federal And State [Member]
Operating Loss Carryforwards [Line Items]
Tax credits, Carryover Amount	97,600,000
Other Federal [Member] | Entergy Arkansas [Member]
Operating Loss Carryforwards [Line Items]
Tax credits, Carryover Amount	0	0
Other Federal [Member] | Entergy Gulf States Louisiana [Member]
Operating Loss Carryforwards [Line Items]
Tax credits, Carryover Amount	$ 0	$ 0
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, 2029
Minimum [Member] | Federal [Member] | Entergy Gulf States Louisiana [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Year(s) of expiration	Dec. 31, 2029
Minimum [Member] | Federal [Member] | Entergy Louisiana [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Year(s) of expiration	Dec. 31, 2029
Minimum [Member] | Federal [Member] | Entergy New Orleans [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Year(s) of expiration	Dec. 31, 2031
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, 2015
Minimum [Member] | State and Local Jurisdiction [Member] | Entergy Arkansas [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Year(s) of expiration	Dec. 31, 2015
Minimum [Member] | State and Local Jurisdiction [Member] | Entergy Gulf States Louisiana [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Year(s) of expiration	Dec. 31, 2024
Minimum [Member] | State and Local Jurisdiction [Member] | Entergy Louisiana [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Year(s) of expiration	Dec. 31, 2024
Minimum [Member] | State and Local Jurisdiction [Member] | Entergy Mississippi [Member]
Operating Loss Carryforwards [Line Items]
Tax credits, Year(s) of expiration	2015
Minimum [Member] | State and Local Jurisdiction [Member] | Entergy New Orleans [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Year(s) of expiration	Dec. 31, 2026
Minimum [Member] | State and Local Jurisdiction [Member] | System Energy [Member]
Operating Loss Carryforwards [Line Items]
Tax credits, Year(s) of expiration	2015
Minimum [Member] | Other Federal And State [Member]
Operating Loss Carryforwards [Line Items]
Tax credits, Year(s) of expiration	2015
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 Gulf States Louisiana [Member]
Operating Loss Carryforwards [Line Items]
Tax credits, Year(s) of expiration	2029
Minimum [Member] | Other Federal [Member] | Entergy Louisiana [Member]
Operating Loss Carryforwards [Line Items]
Tax credits, Year(s) of expiration	2026
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, 2034
Maximum [Member] | Federal [Member] | Entergy Arkansas [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Year(s) of expiration	Dec. 31, 2034
Maximum [Member] | Federal [Member] | Entergy Gulf States Louisiana [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Year(s) of expiration	Dec. 31, 2032
Maximum [Member] | Federal [Member] | Entergy Louisiana [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Year(s) of expiration	Dec. 31, 2034
Maximum [Member] | Federal [Member] | Entergy New Orleans [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Year(s) of expiration	Dec. 31, 2034
Maximum [Member] | Federal [Member] | System Energy [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Year(s) of expiration	Dec. 31, 2032
Maximum [Member] | State and Local Jurisdiction [Member] | Parent Company [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Year(s) of expiration	Dec. 31, 2033
Maximum [Member] | State and Local Jurisdiction [Member] | Entergy Arkansas [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Year(s) of expiration	Dec. 31, 2028
Maximum [Member] | State and Local Jurisdiction [Member] | Entergy Gulf States Louisiana [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Year(s) of expiration	Dec. 31, 2027
Maximum [Member] | State and Local Jurisdiction [Member] | Entergy Louisiana [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Year(s) of expiration	Dec. 31, 2029
Maximum [Member] | State and Local Jurisdiction [Member] | Entergy Mississippi [Member]
Operating Loss Carryforwards [Line Items]
Tax credits, Year(s) of expiration	2019
Maximum [Member] | State and Local Jurisdiction [Member] | Entergy New Orleans [Member]
Operating Loss Carryforwards [Line Items]
Operating losses, Year(s) of expiration	Dec. 31, 2029
Maximum [Member] | State and Local Jurisdiction [Member] | System Energy [Member]
Operating Loss Carryforwards [Line Items]
Tax credits, Year(s) of expiration	2019
Maximum [Member] | Other Federal And State [Member]
Operating Loss Carryforwards [Line Items]
Tax credits, Year(s) of expiration	2034
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 Gulf States Louisiana [Member]
Operating Loss Carryforwards [Line Items]
Tax credits, Year(s) of expiration	2033
Maximum [Member] | Other Federal [Member] | Entergy Louisiana [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	2033
Maximum [Member] | Other Federal [Member] | System Energy [Member]
Operating Loss Carryforwards [Line Items]
Tax credits, Year(s) of expiration	2033