Rate And Regulatory Matters (Details Of Other Regulatory Assets Included In Entergy Corporation And Subsidiaries) (Details) - USD ($) $ in Thousands		Dec. 31, 2018	Dec. 31, 2017
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent		$ 4,746,496	$ 4,935,689
Entergy Arkansas [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent		1,534,977	1,567,437
Regulatory Assets		138,300	176,900
Entergy Louisiana [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent		1,105,077	1,145,842
Entergy Mississippi [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent		343,049	397,909
Regulatory Assets		63,500	91,600
Entergy New Orleans [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent		229,796	251,433
Regulatory Assets		49,300	44,800
Entergy Texas [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent		598,048	661,398
Regulatory Assets		50,900	55,200
System Energy [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent		446,371	444,327
Regulatory Assets		76,400	67,900
Asset Retirement Obligation [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent	[1]	814,300	746,000
Asset Retirement Obligation [Member] | Entergy Arkansas [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent	[1]	381,700	345,200
Asset Retirement Obligation [Member] | Entergy Louisiana [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent	[1]	232,900	218,600
Asset Retirement Obligation [Member] | Entergy Mississippi [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent	[1]	7,200	7,600
Asset Retirement Obligation [Member] | Entergy New Orleans [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent	[1]	4,500	4,300
Asset Retirement Obligation [Member] | System Energy [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent	[1]	186,900	169,100
Pension And Post Retirement Costs [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent	[1]	2,611,500	2,642,300
Pension And Post Retirement Costs [Member] | Entergy Arkansas [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent	[1]	747,200	757,000
Pension And Post Retirement Costs [Member] | Entergy Louisiana [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent	[1]	711,800	724,600
Pension And Post Retirement Costs [Member] | Entergy Mississippi [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent	[1]	215,900	218,700
Pension And Post Retirement Costs [Member] | Entergy New Orleans [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent	[1]	96,200	102,800
Pension And Post Retirement Costs [Member] | Entergy Texas [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent	[1]	171,800	169,200
Pension And Post Retirement Costs [Member] | System Energy [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent	[1]	179,300	202,700
Provision For Storm Damages, Including Hurricane Costs [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent		452,700	558,900
Provision For Storm Damages, Including Hurricane Costs [Member] | Entergy Arkansas [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent		60,700	76,200
Provision For Storm Damages, Including Hurricane Costs [Member] | Entergy Louisiana [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent		17,900	14,300
Provision For Storm Damages, Including Hurricane Costs [Member] | Entergy New Orleans [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent		70,400	82,300
Provision For Storm Damages, Including Hurricane Costs [Member] | Entergy Texas [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent		303,600	386,100
Removal Costs [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent		375,800	436,500
Removal Costs [Member] | Entergy Arkansas [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent		138,300	176,900
Removal Costs [Member] | Entergy Mississippi [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent		63,500	91,600
Removal Costs [Member] | Entergy New Orleans [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent		49,300	44,800
Removal Costs [Member] | Entergy Texas [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent		50,900	55,200
Removal Costs [Member] | System Energy [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent		76,400	67,900
Attorney General Litigation Costs [Member] | Entergy Mississippi [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent	[2]	23,600	9,300
River Bend AFUDC [Member] | Entergy Louisiana [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent		11,000	12,900
Business Combination External Costs Deferral [Member] | Entergy Louisiana [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent	[2]	12,400	14,100
Nuclear Generation Development Costs [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent	[2]	29,000	36,400
Nuclear Generation Development Costs [Member] | Entergy Louisiana [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent	[2]	28,500	35,800
Rate Case Costs [Member] | Entergy New Orleans [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent		1,900	2,600
Little Gypsy Cost Proceeding [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent		52,100	73,700
Little Gypsy Cost Proceeding [Member] | Entergy Louisiana [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent		49,800	71,400
Transition to Competition Costs [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent		26,700	37,700
Transition to Competition Costs [Member] | Entergy Texas [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent		26,700	37,700
Neches and Sabine Costs [Member] | Entergy Texas [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent	[2]	23,600	0
Regulatory Clause Revenues, under-recovered [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent		39,000	86,400
Regulatory Clause Revenues, under-recovered [Member] | Entergy Arkansas [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent		20,500	28,200
Regulatory Clause Revenues, under-recovered [Member] | Entergy Mississippi [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent		16,600	49,400
Regulatory Clause Revenues, under-recovered [Member] | Entergy New Orleans [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent		0	4,400
Unamortized Loss on Reacquired Debt [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent		74,500	82,900
Unamortized Loss on Reacquired Debt [Member] | Entergy Arkansas [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent		21,200	24,300
Unamortized Loss on Reacquired Debt [Member] | Entergy Louisiana [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent		22,500	24,700
Unamortized Loss on Reacquired Debt [Member] | Entergy Mississippi [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent		16,200	17,600
Unamortized Loss on Reacquired Debt [Member] | Entergy New Orleans [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent		2,600	3,000
Unamortized Loss on Reacquired Debt [Member] | Entergy Texas [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent		8,200	8,700
Unamortized Loss on Reacquired Debt [Member] | System Energy [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent		3,800	4,600
ANO Fukushima and Flood Barrier costs [Member] | Entergy Arkansas [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent	[2]	12,600	14,400
Opportunity Sales [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent		116,300	109,800
Opportunity Sales [Member] | Entergy Arkansas [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent		116,300	109,800
Other Regulatory Assets (Liabilities) [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent		154,600	125,100
Other Regulatory Assets (Liabilities) [Member] | Entergy Arkansas [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent		36,500	35,400
Other Regulatory Assets (Liabilities) [Member] | Entergy Louisiana [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent		18,300	29,400
Other Regulatory Assets (Liabilities) [Member] | Entergy Mississippi [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent		0	3,700
Other Regulatory Assets (Liabilities) [Member] | Entergy New Orleans [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent		4,900	7,200
Other Regulatory Assets (Liabilities) [Member] | Entergy Texas [Member]
Details of Other regulatory assets [Abstract]
Regulatory Assets, Noncurrent		$ 13,200	$ 4,500

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

[2] (b)Does not earn a return on investment.