Document and Entity Information (USD $)	12 Months Ended
	Dec. 31, 2012	Jan. 31, 2013	Jun. 30, 2012
Entity Registrant Name	ENTERGY CORP /DE/
Entity Central Index Key	0000065984
Document Type	10-K
Document Period End Date	Dec. 31, 2012
Amendment Flag	false
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	FY
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Public Float			$ 12
Entity Common Stock, Shares Outstanding		178,092,521
Entergy Arkansas [Member]
Entity Registrant Name	Entergy Arkansas, Inc.
Entity Central Index Key	0000007323
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entergy Gulf States Louisiana [Member]
Entity Registrant Name	ENTERGY GULF STATES LOUISIANA, L.L.C.
Entity Central Index Key	0000044570
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entergy Louisiana [Member]
Entity Registrant Name	ENTERGY LOUISIANA, LLC
Entity Central Index Key	0001348952
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entergy Mississippi [Member]
Entity Registrant Name	ENTERGY MISSISSIPPI, INC.
Entity Central Index Key	0000066901
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entergy New Orleans [Member]
Entity Registrant Name	ENTERGY NEW ORLEANS, INC.
Entity Central Index Key	0000071508
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entergy Texas [Member]
Entity Registrant Name	ENTERGY TEXAS, INC.
Entity Central Index Key	0001427437
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
System Energy [Member]
Entity Registrant Name	SYSTEM ENERGY RESOURCES, Inc.
Entity Central Index Key	0000202584
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer