Income Taxes (Schedule Of Statutory Income Tax Rate To Income Before Taxes) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount									$ 0	$ 0	$ 560,410
Amortization of Excess ADIT									(205,614)	(577,082)	0
Revisions of the 2017 Tax Legislation Enactment									0	(40,494)	0
Utility Restructuring					$ (170,000)				0	(169,918)	0
Settlement on Treatment of Regulatory Obligations									0	(52,320)	0
State Income Tax Audit Conclusion									0	(23,425)	0
IRS Audit Adjustment									0	(8,404)	0
Increase (Decrease) due to Entergy Wholesale Commodities Decommissioning Trust Fund Restructuring									0	(106,833)	0
Net Income (Loss) Attributable to Parent									1,241,226	848,661	411,612
Noncontrolling Interest in Net Income (Loss) Preferred Unit Holders, Redeemable									17,018	13,894	13,741
Consolidated net income	$ 389,606	$ 369,459	$ 240,533	$ 258,646	(62,323)	$ 539,818	$ 248,860	$ 136,200	1,258,244	862,555	425,353
Income Tax Expense (Benefit)									(169,825)	(1,036,826)	542,570
Income before income taxes									1,088,419	(174,271)	967,923
Computed at statutory rate (35%)									228,568	(36,597)	338,773
State income taxes net of federal income tax effect									61,791	21,398	44,179
Regulatory differences - utility plant items									(45,336)	(37,507)	39,825
Equity component of AFUDC									(30,444)	(27,216)	(33,282)
Amortization of investment tax credits									(8,093)	(8,304)	(10,204)
Flow-through / permanent differences									(2,059)	439	8,727
Income Tax Reconciliation Provision For Uncertain Tax Positions									7,332	24,569	8,756
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount									59,345	2,211	0
Other - net									$ (1,062)	$ 2,657	$ 3,007
Effective Income Tax Rate									(15.60%)	595.00%	56.10%
Increase (Reduction) in income tax resulting from Entergy Wholesale Commodities restructuring									$ (173,725)	$ 0	$ (373,277)
Effective Income Tax Rate Reconciliation, Fitzpatrick Disposition, Amount									0	0	44,344
Charitable Contribution									(19,101)
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Charitable Contributions, Amount										0	0
Net operating loss recognition									(41,427)	0	0
Entergy Arkansas [Member]
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount										1,290
Amortization of Excess ADIT									(90,921)	(271,570)
Revisions of the 2017 Tax Legislation Enactment										(933)
Settlement on Treatment of Regulatory Obligations										0
Noncontrolling Interest in Net Income (Loss) Preferred Unit Holders, Redeemable									0	1,249	1,428
Consolidated net income	23,828	149,716	50,299	39,121	5,006	128,890	82,556	36,255	262,964	252,707	139,844
Income Tax Expense (Benefit)									(46,769)	(297,067)	93,804
Income before income taxes									216,195	(44,360)	233,648
Computed at statutory rate (35%)									45,401	(9,316)	81,777
State income taxes net of federal income tax effect									15,954	(794)	11,586
Regulatory differences - utility plant items									(10,627)	(14,916)	7,220
Equity component of AFUDC									(3,255)	(3,477)	(6,458)
Amortization of investment tax credits									(1,201)	(1,201)	(1,201)
Flow-through / permanent differences									696	570	3,098
Income Tax Reconciliation Provision For Uncertain Tax Positions									(3,517)	724	200
Other - net									$ 701	$ 690	$ 672
Effective Income Tax Rate									(21.60%)	669.70%	40.10%
Increase (Reduction) in income tax resulting from Act 55 financing settlement											$ (3,090)
Effective Income Tax Rate Reconciliation, Noncontrolling Interest Income (Loss), Amount									$ 0	$ 0	0
Entergy Louisiana [Member]
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount										1,097
Amortization of Excess ADIT									(28,531)	(104,313)
Revisions of the 2017 Tax Legislation Enactment										2,810
Settlement on Treatment of Regulatory Obligations										52,320
Consolidated net income	125,560	255,260	183,084	127,633	161,355	218,308	184,358	111,593	691,537	675,614	316,347
Income Tax Expense (Benefit)									121,623	(54,611)	485,298
Income before income taxes									813,160	621,003	801,645
Computed at statutory rate (35%)									170,764	130,411	280,576
State income taxes net of federal income tax effect									42,854	26,031	31,927
Regulatory differences - utility plant items									(19,421)	(12,604)	12,168
Equity component of AFUDC									(15,545)	(16,784)	(18,020)
Amortization of investment tax credits									(4,871)	(4,871)	(4,871)
Flow-through / permanent differences									439	3,203	3,774
Income Tax Reconciliation Provision For Uncertain Tax Positions									1,519	3,949	5,700
Other - net									$ 1,210	$ 1,195	$ 1,444
Effective Income Tax Rate									15.00%	(8.80%)	60.50%
Increase (Reduction) in income tax resulting from Act 55 financing settlement											$ 217,258
Effective Income Tax Rate Reconciliation, Noncontrolling Interest Income (Loss), Amount									$ (26,795)	$ (26,795)	(44,658)
Entergy Mississippi [Member]
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount										1,018
Amortization of Excess ADIT									203	(120,831)
Revisions of the 2017 Tax Legislation Enactment										556
Settlement on Treatment of Regulatory Obligations										0
Noncontrolling Interest in Net Income (Loss) Preferred Unit Holders, Redeemable									0	834	953
Consolidated net income	21,623	56,237	26,667	15,398	14,260	50,733	38,242	22,843	119,925	126,078	110,032
Income Tax Expense (Benefit)									30,866	(125,773)	73,919
Income before income taxes									150,791	305	183,951
Computed at statutory rate (35%)									31,666	64	64,383
State income taxes net of federal income tax effect									5,563	(1,747)	6,202
Regulatory differences - utility plant items									(5,556)	(4,103)	1,356
Equity component of AFUDC									(1,755)	(1,829)	(3,383)
Amortization of investment tax credits									(160)	(160)	(160)
Flow-through / permanent differences									160	1,893	1,567
Income Tax Reconciliation Provision For Uncertain Tax Positions									500	240	228
Other - net									$ 245	$ 238	$ 234
Effective Income Tax Rate									20.50%	(41237.00%)	40.20%
Increase (Reduction) in income tax resulting from Act 55 financing settlement											$ 3,492
Effective Income Tax Rate Reconciliation, Noncontrolling Interest Income (Loss), Amount									$ 0	$ 0	0
Entergy New Orleans [Member]
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount										(96)
Amortization of Excess ADIT									(11,724)	(9,878)
Revisions of the 2017 Tax Legislation Enactment										(884)
Settlement on Treatment of Regulatory Obligations										0
Noncontrolling Interest in Net Income (Loss) Preferred Unit Holders, Redeemable									0	0	841
Consolidated net income	5,695	24,908	13,003	9,023	2,594	21,407	18,269	10,882	52,629	53,152	44,553
Income Tax Expense (Benefit)									186	(2,436)	33,278
Income before income taxes									52,815	50,716	77,831
Computed at statutory rate (35%)									11,091	10,650	27,241
State income taxes net of federal income tax effect									3,443	2,322	2,842
Regulatory differences - utility plant items									(1,532)	(1,502)	619
Equity component of AFUDC									(2,088)	(1,248)	(847)
Amortization of investment tax credits									(88)	(109)	(124)
Flow-through / permanent differences									(741)	(4,222)	(3,352)
Income Tax Reconciliation Provision For Uncertain Tax Positions									1,672	613	600
Other - net									$ 153	$ 150	$ 146
Effective Income Tax Rate									0.40%	(4.80%)	42.80%
Increase (Reduction) in income tax resulting from Act 55 financing settlement											$ 6,153
Effective Income Tax Rate Reconciliation, Noncontrolling Interest Income (Loss), Amount									$ 0	$ 0	0
Entergy Texas [Member]
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount										524
Amortization of Excess ADIT									(69,091)	(11,519)
Revisions of the 2017 Tax Legislation Enactment										43,799
Settlement on Treatment of Regulatory Obligations										0
Noncontrolling Interest in Net Income (Loss) Preferred Unit Holders, Redeemable									580	0	0
Consolidated net income	25,895	73,224	38,936	21,342	48,250	65,846	30,789	17,350	159,397	162,235	76,173
Income Tax Expense (Benefit)									(53,896)	(26,243)	48,481
Income before income taxes									105,501	135,992	124,654
Computed at statutory rate (35%)									22,155	28,558	43,629
State income taxes net of federal income tax effect									360	2,576	527
Regulatory differences - utility plant items									(1,987)	(1,872)	5,581
Equity component of AFUDC									(5,973)	(2,042)	(2,353)
Amortization of investment tax credits									(617)	(808)	(951)
Flow-through / permanent differences									560	1,038	1,428
Income Tax Reconciliation Provision For Uncertain Tax Positions									430	839	(2,617)
Other - net									$ 267	$ 262	$ 256
Effective Income Tax Rate									(51.10%)	(19.30%)	38.90%
Increase (Reduction) in income tax resulting from Act 55 financing settlement											$ 2,981
Effective Income Tax Rate Reconciliation, Noncontrolling Interest Income (Loss), Amount									$ 0	$ 0	0
System Energy [Member]
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount										(12)
Amortization of Excess ADIT									(5,550)	(58,971)
Revisions of the 2017 Tax Legislation Enactment										3,565
Settlement on Treatment of Regulatory Obligations										0
Consolidated net income	$ 26,039	$ 25,031	$ 24,472	$ 23,578	$ 25,442	$ 22,972	$ 23,387	$ 22,308	99,120	94,109	78,596
Income Tax Expense (Benefit)									15,349	(47,675)	69,969
Income before income taxes									114,469	46,434	148,565
Computed at statutory rate (35%)									24,039	9,751	51,998
State income taxes net of federal income tax effect									5,134	2,812	5,635
Regulatory differences - utility plant items									(6,213)	(2,510)	12,880
Equity component of AFUDC									(1,829)	(1,837)	(2,221)
Amortization of investment tax credits									(1,155)	(1,155)	(2,896)
Flow-through / permanent differences									(500)	2,815	(276)
Income Tax Reconciliation Provision For Uncertain Tax Positions									1,300	4,876	4,800
Other - net									$ 123	$ 121	$ 118
Effective Income Tax Rate									13.40%	(102.70%)	47.10%
Increase (Reduction) in income tax resulting from Act 55 financing settlement											$ (69)
Effective Income Tax Rate Reconciliation, Noncontrolling Interest Income (Loss), Amount									$ 0	$ 0	$ 0