Rate And Regulatory Matters (Details Of Other Regulatory Assets Included In Entergy Corporation And Subsidiaries) (Details) - USD ($) $ in Thousands		Dec. 31, 2015	Dec. 31, 2014
Details of Other regulatory assets [Abstract]
Other Regulatory Assets		$ 4,704,796	$ 4,968,553
Entergy Arkansas [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets		1,333,773	1,391,276
Entergy Louisiana [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets		1,217,874	1,340,610
Entergy Mississippi [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets		328,681	364,747
Entergy New Orleans [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets		265,322	194,851
Entergy Texas [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets		812,862	922,087
System Energy [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets		347,830	335,613
Asset Retirement Obligation [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	[1]	589,100	513,800
Asset Retirement Obligation [Member] | Entergy Arkansas [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	[1]	288,000	254,800
Asset Retirement Obligation [Member] | Entergy Louisiana [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	[1]	180,800	167,500
Asset Retirement Obligation [Member] | Entergy Mississippi [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	[1]	6,700	6,300
Asset Retirement Obligation [Member] | Entergy New Orleans [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	[1]	4,000	3,800
Asset Retirement Obligation [Member] | System Energy [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	[1]	108,600	80,400
New Nuclear Generation Development Costs [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	[2]	51,100	58,400
Gas Hedging Costs [Member] | Entergy Louisiana [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets		7,000	15,800
Pension And Post Retirement Costs [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	[1]	2,574,900	2,798,800
Pension And Post Retirement Costs [Member] | Entergy Arkansas [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	[1]	766,500	838,200
Pension And Post Retirement Costs [Member] | Entergy Louisiana [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	[1]	718,700	774,000
Pension And Post Retirement Costs [Member] | Entergy Mississippi [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	[1]	216,100	224,300
Pension And Post Retirement Costs [Member] | Entergy New Orleans [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	[1]	103,700	115,800
Pension And Post Retirement Costs [Member] | Entergy Texas [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	[1]	193,600	217,000
Pension And Post Retirement Costs [Member] | System Energy [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	[1]	178,000	191,000
Provision For Storm Damages, Including Hurricane Costs [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets		717,800	736,200
Provision For Storm Damages, Including Hurricane Costs [Member] | Entergy Arkansas [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets		97,200	125,600
Provision For Storm Damages, Including Hurricane Costs [Member] | Entergy New Orleans [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets		104,000	18,500
Provision For Storm Damages, Including Hurricane Costs [Member] | Entergy Texas [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets		516,200	591,700
Removal Costs [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	[1]	273,300	245,100
Removal Costs [Member] | Entergy Arkansas [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	[1]	85,700	59,000
Removal Costs [Member] | Entergy Mississippi [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	[1]	77,500	76,300
Removal Costs [Member] | Entergy New Orleans [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	[1]	29,400	35,200
Removal Costs [Member] | Entergy Texas [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	[1]	25,800	18,900
Removal Costs [Member] | System Energy [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	[1]	54,800	55,700
River Bend AFUDC [Member] | Entergy Louisiana [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets		16,700	18,600
Business Combination External Costs Deferral [Member] | Entergy Louisiana [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets		16,100	0
Nuclear Generation Development Costs [Member] | Entergy Louisiana [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	[2]	50,400	58,400
Spindletop Gas Storage Facility [Member] | Entergy Louisiana [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets		1,100	26,200
Rate Case Costs [Member] | Entergy New Orleans [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	[2]	3,200	3,000
Rate Case Costs [Member] | Entergy Texas [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	[2]	3,800	8,400
Little Gypsy Cost Proceeding [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets		121,100	139,200
Little Gypsy Cost Proceeding [Member] | Entergy Louisiana [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets		119,200	139,200
Regulatory Clause Revenues, under-recovered [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets		32,200	54,700
Regulatory Clause Revenues, under-recovered [Member] | Entergy Arkansas [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets		18,100	23,300
Regulatory Clause Revenues, under-recovered [Member] | Entergy Mississippi [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets		7,600	27,000
Regulatory Clause Revenues, under-recovered [Member] | Entergy New Orleans [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets		3,100	400
Incremental Ice Storm Costs [Member] | Entergy Arkansas [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets		8,400	9,000
Michoud Plant Maintenance [Member] | Entergy New Orleans [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets		5,200	7,200
Human Capital Management Costs [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets		28,300	42,300
Human Capital Management Costs [Member] | Entergy Arkansas [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	[2]	10,400	17,300
Human Capital Management Costs [Member] | Entergy Louisiana [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets		17,600	25,000
Lake Catherine 4 Reliability and Sustainability Cost Deferral [Member] | Entergy Arkansas [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	[2]	10,400	2,400
Unamortized Loss on Reacquired Debt [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets		66,700	76,200
Unamortized Loss on Reacquired Debt [Member] | Entergy Arkansas [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets		23,000	26,200
Unamortized Loss on Reacquired Debt [Member] | Entergy Louisiana [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets		19,200	21,100
Unamortized Loss on Reacquired Debt [Member] | Entergy Mississippi [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets		7,100	8,200
Unamortized Loss on Reacquired Debt [Member] | Entergy New Orleans [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets		1,600	1,800
Unamortized Loss on Reacquired Debt [Member] | Entergy Texas [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets		9,400	10,500
Unamortized Loss on Reacquired Debt [Member] | System Energy [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets		6,400	8,500
Other [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets		143,500	168,100
Other [Member] | Entergy Arkansas [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets		8,600	10,400
Other [Member] | Entergy Louisiana [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets		30,000	34,400
Other [Member] | Entergy Mississippi [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets		7,800	12,600
Other [Member] | Entergy New Orleans [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets		11,100	9,200
Other [Member] | Entergy Texas [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets		6,700	9,400
MISO Implementation Costs [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets		49,400	69,600
MISO Implementation Costs [Member] | Entergy Arkansas [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets	[2]	17,500	25,100
MISO Implementation Costs [Member] | Entergy Louisiana [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets		26,600	37,100
MISO Implementation Costs [Member] | Entergy Mississippi [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets		2,700	4,000
Transition to Competition Costs [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets		57,400	66,200
Transition to Competition Costs [Member] | Entergy Texas [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets		57,400	66,200
Baxter Wilson Costs [Member] | Entergy Mississippi [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets		3,200	6,000
MISO Integration Deferral [Member] | Entergy Louisiana [Member]
Details of Other regulatory assets [Abstract]
Other Regulatory Assets		$ 14,500	$ 23,300

[1] Does not earn a return on investment, but is offset by related liabilities.

[2] Does not earn a return on investment.