Rate And Regulatory Matters (Narrative) (Details) $ in Thousands	1 Months Ended
	Jul. 31, 2015 USD ($)	Jun. 30, 2015 USD ($)	May. 31, 2015 USD ($)	Apr. 30, 2015 USD ($)	Feb. 28, 2015	Jan. 31, 2015 USD ($)	Sep. 30, 2014 USD ($)	Aug. 31, 2014 USD ($)	Dec. 31, 2014 USD ($)
Commitments and Contingencies [Abstract]
Deferred Fuel Cost		$ 98,196							$ 155,140
Entergy Louisiana [Member]
Commitments and Contingencies [Abstract]
Estimated Customer Benefits Anticipated with Business Combination							$ 128,000
Proposed Guaranteed Savings Projected for Business Combination							97,000
Entergy Louisiana [Member] | Subsequent Event [Member]
Commitments and Contingencies [Abstract]
Customer Benefits Anticipated with Business Combination Per Stipulated Settlement with LPSC	$ 107,000
Rate Increase Included in Legacy Formula Rate Plan	10,000
Upper Limit on Rates	30,000
Deferred External Costs Associated with Business Combination	25,000
Entergy Mississippi [Member]
Commitments and Contingencies [Abstract]
Deferred Fuel Over-Recovery Balance			$ 58,300
Under-Recovery Under Power Management Rider			12,300
Entergy Mississippi [Member] | Subsequent Event [Member]
Commitments and Contingencies [Abstract]
Net Over-Recovery of Rider Revenues	$ 46,000
Refund Period for Over-Recovery	6 months
Entergy Gulf States Louisiana [Member]
Commitments and Contingencies [Abstract]
Public Utilities Earned Return On Common Equity						7.20%
Net increase in revenues				$ 688
Recommended adjustment to earned return on equity				7.24%
Estimated Customer Benefits Anticipated with Business Combination							128,000
Proposed Guaranteed Savings Projected for Business Combination							$ 97,000
Public Utilities, Requested Rate Increase (Decrease), Amount						$ 706
LPSC Recommended Number of Adjustments to As-Filed Gas Rate Stabilization Plan				2
Entergy Gulf States Louisiana [Member] | Subsequent Event [Member]
Commitments and Contingencies [Abstract]
Customer Benefits Anticipated with Business Combination Per Stipulated Settlement with LPSC	$ 107,000
Upper Limit on Rates	30,000
Deferred External Costs Associated with Business Combination	$ 25,000
Entergy New Orleans [Member]
Commitments and Contingencies [Abstract]
Requested capacity to purchase on a life-of-unit basis from Union Power Station					20.00%
Refund To Customers		$ 4,800
Power blocks					2
Financing order authorized to issue storm cost recovery bonds			98,700
Replenishment amount for storm reserve spending			63,900
Amount of Hurricane Issac storm cost to be recovered through securitization			31,800
Up Front Financing Costs On Issuance Of Bonds To Recover Storm Damage Restoration Costs			$ 3,000
Entergy Texas [Member]
Commitments and Contingencies [Abstract]
Public Utilities Earned Return On Common Equity		10.20%
Deferred Fuel Cost		$ 11,609							11,861
Public Utilities, Requested Rate Increase (Decrease), Amount		75,000
Refund for fuel cost recovery								$ 24,600
Entergy Texas [Member] | Subsequent Event [Member]
Commitments and Contingencies [Abstract]
Power blocks	1,000,000
System Agreement Bandwidth Refund	$ 10,900
Entergy Arkansas [Member]
Commitments and Contingencies [Abstract]
Public Utilities Earned Return On Common Equity				10.20%
Net increase in revenues				$ 167,000
Rate Increase				$ 268,400
Deferred Fuel Cost		$ 86,587							$ 143,279