Rate And Regulatory Matters (Narrative) (Details) (USD $)	1 Months Ended							0 Months Ended		1 Months Ended												3 Months Ended	4 Months Ended	1 Months Ended	0 Months Ended	1 Months Ended
	Sep. 30, 2013 Entergy Louisiana [Member]	Apr. 30, 2013 Entergy Louisiana [Member]	Mar. 31, 2013 Entergy Louisiana [Member]	Jan. 31, 2013 Entergy Louisiana [Member]	Dec. 31, 2012 Entergy Louisiana [Member]	Aug. 31, 2012 Entergy Louisiana [Member]	May 31, 2012 Entergy Louisiana [Member]	Jul. 02, 2013 Entergy Mississippi [Member]	Jun. 06, 2013 Entergy Mississippi [Member]	Aug. 31, 2013 Entergy Mississippi [Member]	Mar. 31, 2013 Entergy Mississippi [Member]	Dec. 31, 2012 Entergy Mississippi [Member]	Sep. 30, 2013 Entergy Gulf States Louisiana [Member]	May 31, 2013 Entergy Gulf States Louisiana [Member]	Apr. 30, 2013 Entergy Gulf States Louisiana [Member]	Jan. 31, 2013 Entergy Gulf States Louisiana [Member]	Dec. 31, 2012 Entergy Gulf States Louisiana [Member]	Aug. 31, 2012 Entergy Gulf States Louisiana [Member]	May 31, 2012 Entergy Gulf States Louisiana [Member]	Aug. 31, 2013 Entergy New Orleans	Dec. 31, 2012 Entergy New Orleans	Jun. 30, 2013 Entergy New Orleans	Dec. 31, 2013 Entergy New Orleans	Sep. 30, 2013 Entergy Texas [Member]	Aug. 31, 2013 Entergy Arkansas [Member]	Sep. 30, 2013 Entergy Arkansas [Member]	Apr. 30, 2013 Entergy Arkansas [Member]	Mar. 31, 2013 Entergy Arkansas [Member]	Dec. 31, 2012 Entergy Arkansas [Member]
Commitments and Contingencies [Abstract]
Rate Case Filing Request Special Circumstances Fuel Cost Recovery Of Purchased Power Costs																								$ 22,000,000
Rate Case Filing Request To Reconcile Fuel and Purchased Power Costs and Fuel Revenues																								900,000,000
LPSC Proposed Adjustments to Hurricane Isaac Storm Restoration Costs	1.00%												1.00%
MPSC Authorized Deferral of MISO Related Implementation Costs										1,200,000
Additional Provision Recorded For Refund To Customers																						1,100,000
Refund To Customers																							6,000,000
Potential cost for Entergy Arkansas for years 2003, 2004, and 2006 based on intra-system bills																													12,000,000
Increase In Potential Costs For Entergy Arkansas For Years 2003, 2004, and 2006 Based On Intra-System Bill																											2,300,000
Per LPSC, the amount of damages to be paid by Entergy Arkansas to the Utility Operating Companies					7,000,000							23,000,000					42,000,000				4,000,000
Reduction In Amount Of Damages That Should Be Paid BY Entergy Arkansas To The Utility Operating Companies																									20.00%
Requested replenishment of storm escrow accounts - Hurricane Isaac	200,000,000	200,000,000											90,000,000		90,000,000
Requested recovery of system restoration costs - Hurricane Isaac		247,700,000													73,800,000
Intervenor Recommendation For Replenishment of Storm Reserves Related to Hurricane Isaac	100,000,000												70,000,000
Storm restoration costs incurred - Hurricane Isaac								32,000,000
Storm restoration costs incurred that are recoverable through the formula rate plan - Hurricane Isaac								700,000
Storm reserve accrual - Hurricane Isaac								750,000
Increase for first year retail revenue requirement associated with W3 replacement steam generator project					88,000,000
Reduction For First Year Capacity Charges For Purchase By Entergy Gulf States Louisiana From Entergy Louisiana for One Third Of Acadia Unit 2 Capacity And Energy					17,000,000
Expected retail jurisdictional cost																	16,900,000
APSC filing requested return on common equity																										10.40%		10.40%
APSC filing requested rate increase proposed spin merge of transmission business																												218,000,000
APSC filing requested revenue transfer from collection in riders to base rates MISO scenario																												49,000,000
APSC filing requested rate increase transition to MISO scenario																										145,000,000		174,000,000
Realignment of the recovery from Entergy Louisiana's fuel adjustment clause to base rates per LPSC January 2013 audit report				1,000,000
Refund to customers per LPSC Staff January 2013 audit report				1,900,000
Public Utilities Recommended Midpoint Return On Common Equity							9.63%							9.95%
Public Utilities Earned Return On Common Equity			10.40%			10.38%			10.59%		10.55%					11.18%		11.86%	11.94%					10.40%
Rate reduction																43,000
Rate Increase			13,000,000																					38,600,000
Cost Of Service Rate Decrease																		5,700,000	6,500,000
Rate Decrease for Incremental Capacity Costs																		20,300,000	22,900,000
Rate Increase for Incremental Capacity Costs						15,900,000	18,100,000								7,300,000
Electric Base Revenue Increase									22,300,000		36,300,000
Electric Base Revenue Decrease																				1,625,000
Increase in Annual Funding for Storm Reserve								1,750,000
Withdrawal From Funded Storm Reserve				$ 187,000,000												$ 65,000,000