Rate And Regulatory Matters (Narrative) (Details)	1 Months Ended													6 Months Ended		36 Months Ended
	Jul. 31, 2016 USD ($)	Jun. 30, 2016 USD ($)	May 31, 2016 USD ($)	Apr. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Feb. 29, 2016 USD ($)	Jan. 31, 2016	Dec. 31, 2015 USD ($)	Nov. 30, 2015 USD ($)	Sep. 30, 2015 USD ($)	Jul. 31, 2015 USD ($)	Apr. 30, 2015 USD ($)	Jan. 31, 2013 USD ($) intervenor	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2016 USD ($)	May 31, 2015 USD ($)	Jan. 31, 2015 USD ($)
Commitments and Contingencies [Abstract]
Deferred Fuel Cost		$ 31,895,000						$ 0						$ 31,895,000
Payments to Acquire Property, Plant, and Equipment														(947,903,000)	$ 0
Entergy Louisiana [Member]
Regulatory Assets [Line Items]
Refund to customers per LPSC Staff January 2013 audit report													$ 1,900,000
Realignment of the recovery from Entergy Louisiana's fuel adjustment clause to base rates per LPSC January 2013 audit report													$ 1,000,000
Number of Parties That Intervened in LPSC Proceeding | intervenor													2
Number of Intervenors | intervenor													1
Commitments and Contingencies [Abstract]
Public Utilities Earned Return On Common Equity			9.07%				10.22%
LPSC staff recommended fuel refund including interest					$ 8,600,000
Amount of LPSC Recommended Realignment of Fuel Costs to Base Rates					12,700,000
Payments to Acquire Property, Plant, and Equipment					(474,000,000)									(473,956,000)	0
Estimated costs at completion for Ninemile 6 project											$ 648,000,000
Decrease in estimated costs at completion for Ninemile 6 project											76,000,000
Adjustment to formula rate plan to increase Legacy Entergy Louisiana additional capacity mechanism			$ 14,200,000
Adjustment to formula rate plan to increase Legacy Entergy Gulf States Louisiana additional capacity mechanism			500,000
Adjustment to formula rate plan to increase Legacy Entergy Louisiana revenues due to effect of system agreement termination			10,000,000
Adjustment to formula rate plan to decrease Legacy Entergy Gulf States Louisiana revenues due to effect of system agreement termination			58,700,000
Adjustment to formula rate plan for increase in MISO cost recovery mechanism			11,000,000
Entergy Mississippi [Member]
Commitments and Contingencies [Abstract]
Public Utilities Earned Return On Common Equity		10.07%
Deferred Fuel Over-Recovery Balance																	$ 58,300,000
Under-Recovery Under Power Management Rider																	$ 12,300,000
Net Over-Recovery of Rider Revenues											46,000,000
Projected Over-Recovery Energy Cost Recovery Rider						$ 68,000,000			$ 48,000,000
Public Utilities, Requested Rate Increase (Decrease), Amount					$ 32,600,000
Public Utilities, Requested Return on Equity, Percentage					9.96%
Public Utilities, Approved Rate Increase (Decrease), Amount		$ 23,700,000
Rate Increase Included in Formula Rate Plan		19,400,000
Increase in expenses to be collected through ad valorem tax adjustment rider		4,300,000
Authorized Storm Damage Reserve Balance																		$ 15,000,000
Upper limit not exceeded for storm accrual balance				$ 10,000,000
Entergy New Orleans [Member]
Commitments and Contingencies [Abstract]
Long-term payable due to Entergy Louisiana		20,527,000						20,527,000						20,527,000
Payments to Acquire Property, Plant, and Equipment					$ (237,000,000)									(236,978,000)	0
Authorized monthly customer credits									400,000
Entergy New Orleans [Member] | Subsequent Event [Member]
Commitments and Contingencies [Abstract]
Monthly customer credits	$ 1,400,000
Proposed annual customer credits	5,000,000
Redemption of Preferred Equity	21,000,000
Call Premium on Preferred Stock	819,000
Entergy Texas [Member]
Commitments and Contingencies [Abstract]
Public Utilities, Requested Rate Increase (Decrease), Amount										$ 13,000,000
Refund To Customers		68,000,000		56,200,000
Refund for fuel cost recovery				41,800,000
System Agreement Bandwidth Refund Related to Calendar Year 2006 Production Costs											$ 10,900,000
System Agreement Bandwidth Refund Related to Calendar Year 2006-2008 Production Costs				$ 3,500,000
Reduction in approved retail rate increase									2,000,000
Intervenor Recommended Disallowance Due to Load Growth Adjustment									$ 3,400,000
Jurisdictional eligible fuel and purchased power expenses, net of credits																$ 1,770,000,000
Entergy Texas [Member] | Subsequent Event [Member]
Commitments and Contingencies [Abstract]
Public Utilities, Approved Rate Increase (Decrease), Amount	10,500,000
Estimated deferred fuel over recovery balance for reconciliation period	19,300,000
Entergy Arkansas [Member]
Commitments and Contingencies [Abstract]
APSC and Intervener Recommended Revenue Requirement										$ 217,900,000
APSC and Intervener Recommended Return on Equity										9.65%
Net increase in revenues								133,000,000				$ 167,000,000
Deferred Fuel Cost		$ 31,895,000						0						31,895,000
Public Utilities, Requested Rate Increase (Decrease), Amount												$ 268,400,000
Public Utilities, Requested Return on Equity, Percentage												10.20%
Public Utilities, Approved Rate Increase (Decrease), Amount								$ 225,000,000
Public Utilities, Approved Return on Equity, Percentage								9.75%
Basis Point Band								50.00%
Payments to Acquire Property, Plant, and Equipment					(237,000,000)									$ (236,969,000)	$ 0
Post-Fukushima Compliance Costs								$ 7,700,000
Flood Barrier Compliance Costs								$ 9,900,000
Reduction in approved retail rate increase						$ 5,000,000
Interim Base Rate Adjustment Surcharge Recovery					21,100,000
ALJ Recommended Percentage By Which Payments Be Reduced				20.00%
Liability Recorded Related to Estimated Payments Due Utility Operating Companies					87,000,000											87,000,000
Regulatory Asset Recorded to Represent Estimate of Recoverable Retail Portion of Costs					$ 75,000,000											$ 75,000,000
Redetermination Of Production Cost Allocation Rider Unrecovered Retail Balance			$ 1,900,000
Entergy Arkansas [Member] | Subsequent Event [Member]
Commitments and Contingencies [Abstract]
Public Utilities, Requested Rate Increase (Decrease), Amount	$ 68,000,000
Public Utilities, Requested Return on Equity, Percentage	9.75%