Income Taxes (Schedule Of Statutory Income Tax Rate To Income Before Taxes) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount									$ 0	$ 560,410	$ 0
Amortization of Excess ADIT									(577,082)	0	0
Revisions of the 2017 Tax Legislation Enactment									(40,494)	0	0
Utility Restructuring									(169,918)	0	0
Settlement on Treatment of Regulatory Obligations									(52,320)	0	0
State Income Tax Audit Conclusion									(23,425)	0	0
IRS Audit Adjustment									(8,404)	0	0
Increase (Decrease) due to Entergy Wholesale Commodities Decommissioning Trust Fund Restructuring									(106,833)	0	0
Net income (loss) attributable to Entergy Corporation									848,661	411,612	(583,618)
Noncontrolling Interest in Net Income (Loss) Preferred Unit Holders, Redeemable									13,894	13,741	19,115
Consolidated net income (loss)	$ (62,323)	$ 539,818	$ 248,860	$ 136,200	$ (475,710)	$ 401,644	$ 413,368	$ 86,051	862,555	425,353	(564,503)
Income Tax Expense (Benefit)									(1,036,826)	542,570	(817,259)
Income before income taxes									(174,271)	967,923	(1,381,762)
Computed at statutory rate (35%)									(36,597)	338,773	(483,617)
State income taxes net of federal income tax effect									21,398	44,179	40,581
Regulatory differences - utility plant items									(37,507)	39,825	33,581
Equity component of AFUDC									(27,216)	(33,282)	(23,647)
Amortization of investment tax credits									(8,304)	(10,204)	(10,889)
Flow-through / permanent differences									439	8,727	(19,307)
Income Tax Reconciliation Provision For Uncertain Tax Positions									24,569	8,756	(67,119)
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount									2,211	0	11,411
Other - net									$ 2,657	$ 3,007	$ 2,984
Effective Income Tax Rate									595.00%	56.10%	59.10%
Increase (Reduction) in income tax resulting from Entergy Wholesale Commodities restructuring									$ 0	$ (373,277)	$ (237,760)
Increase (Reduction) in income tax resulting from Act 55 financing settlement									0	0	(63,477)
Effective Income Tax Rate Reconciliation, Fitzpatrick Disposition, Amount									0	44,344	0
Entergy Arkansas [Member]
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount										(3,090)
Amortization of Excess ADIT									(271,570)
Revisions of the 2017 Tax Legislation Enactment									933
Settlement on Treatment of Regulatory Obligations									0
IRS Audit Adjustment									1,290
Noncontrolling Interest in Net Income (Loss) Preferred Unit Holders, Redeemable									1,249	1,428	5,270
Consolidated net income (loss)	5,006	128,890	82,556	36,255	(5,648)	92,638	38,550	14,304	252,707	139,844	167,212
Income Tax Expense (Benefit)									(297,067)	93,804	107,773
Income before income taxes									(44,360)	233,648	274,985
Computed at statutory rate (35%)									(9,316)	81,777	96,245
State income taxes net of federal income tax effect									(794)	11,586	11,652
Regulatory differences - utility plant items									(14,916)	7,220	10,971
Equity component of AFUDC									(3,477)	(6,458)	(5,985)
Amortization of investment tax credits									(1,201)	(1,201)	(1,201)
Flow-through / permanent differences									570	3,098	(3,848)
Income Tax Reconciliation Provision For Uncertain Tax Positions									724	200	(717)
Other - net									$ 690	$ 672	$ 656
Effective Income Tax Rate									669.70%	40.10%	39.20%
Increase (Reduction) in income tax resulting from Act 55 financing settlement											$ 0
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										217,258
Amortization of Excess ADIT									(104,313)
Revisions of the 2017 Tax Legislation Enactment									(2,810)
Settlement on Treatment of Regulatory Obligations									(52,320)
IRS Audit Adjustment									1,097
Consolidated net income (loss)	161,355	218,308	184,358	111,593	(88,794)	186,284	124,479	94,378	675,614	316,347	622,047
Income Tax Expense (Benefit)									(54,611)	485,298	89,734
Income before income taxes									621,003	801,645	711,781
Computed at statutory rate (35%)									130,411	280,576	249,123
State income taxes net of federal income tax effect									26,031	31,927	29,014
Regulatory differences - utility plant items									(12,604)	12,168	8,094
Equity component of AFUDC									(16,784)	(18,020)	(9,774)
Amortization of investment tax credits									(4,871)	(4,871)	(5,019)
Flow-through / permanent differences									3,203	3,774	(980)
Income Tax Reconciliation Provision For Uncertain Tax Positions									3,949	5,700	(75,871)
Other - net									$ 1,195	$ 1,444	$ 1,425
Effective Income Tax Rate									(8.80%)	60.50%	12.60%
Increase (Reduction) in income tax resulting from Act 55 financing settlement											$ (61,620)
Effective Income Tax Rate Reconciliation, Noncontrolling Interest Income (Loss), Amount									$ (26,795)	$ (44,658)	(44,658)
Entergy Mississippi [Member]
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount										3,492
Amortization of Excess ADIT									(120,831)
Revisions of the 2017 Tax Legislation Enactment									(556)
Settlement on Treatment of Regulatory Obligations									0
IRS Audit Adjustment									1,018
Noncontrolling Interest in Net Income (Loss) Preferred Unit Holders, Redeemable									834	953	2,443
Consolidated net income (loss)	14,260	50,733	38,242	22,843	18,026	46,545	28,303	17,158	126,078	110,032	109,184
Income Tax Expense (Benefit)									(125,773)	73,919	63,854
Income before income taxes									305	183,951	173,038
Computed at statutory rate (35%)									64	64,383	60,563
State income taxes net of federal income tax effect									(1,747)	6,202	5,592
Regulatory differences - utility plant items									(4,103)	1,356	(1,154)
Equity component of AFUDC									(1,829)	(3,383)	(2,030)
Amortization of investment tax credits									(160)	(160)	(160)
Flow-through / permanent differences									1,893	1,567	764
Income Tax Reconciliation Provision For Uncertain Tax Positions									240	228	50
Other - net									$ 238	$ 234	$ 229
Effective Income Tax Rate									(41237.00%)	40.20%	36.90%
Increase (Reduction) in income tax resulting from Act 55 financing settlement											$ 0
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										6,153
Amortization of Excess ADIT									(9,878)
Revisions of the 2017 Tax Legislation Enactment									884
Settlement on Treatment of Regulatory Obligations									0
IRS Audit Adjustment									(96)
Noncontrolling Interest in Net Income (Loss) Preferred Unit Holders, Redeemable									0	841	965
Consolidated net income (loss)	2,594	21,407	18,269	10,882	164	18,529	14,882	10,978	53,152	44,553	48,849
Income Tax Expense (Benefit)									(2,436)	33,278	28,705
Income before income taxes									50,716	77,831	77,554
Computed at statutory rate (35%)									10,650	27,241	27,144
State income taxes net of federal income tax effect									2,322	2,842	3,543
Regulatory differences - utility plant items									(1,502)	619	2,329
Equity component of AFUDC									(1,248)	(847)	(412)
Amortization of investment tax credits									(109)	(124)	(132)
Flow-through / permanent differences									(4,222)	(3,352)	(3,609)
Income Tax Reconciliation Provision For Uncertain Tax Positions									613	600	(300)
Other - net									$ 150	$ 146	$ 142
Effective Income Tax Rate									(4.80%)	42.80%	37.00%
Increase (Reduction) in income tax resulting from Act 55 financing settlement											$ 0
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										2,981
Amortization of Excess ADIT									(11,519)
Revisions of the 2017 Tax Legislation Enactment									(43,799)
Settlement on Treatment of Regulatory Obligations									0
IRS Audit Adjustment									524
Consolidated net income (loss)	48,250	65,846	30,789	17,350	4,630	39,588	21,101	10,854	162,235	76,173	107,538
Income Tax Expense (Benefit)									(26,243)	48,481	63,097
Income before income taxes									135,992	124,654	170,635
Computed at statutory rate (35%)									28,558	43,629	59,722
State income taxes net of federal income tax effect									2,576	527	449
Regulatory differences - utility plant items									(1,872)	5,581	4,140
Equity component of AFUDC									(2,042)	(2,353)	(2,666)
Amortization of investment tax credits									(808)	(951)	(900)
Flow-through / permanent differences									1,038	1,428	634
Income Tax Reconciliation Provision For Uncertain Tax Positions									839	(2,617)	1,926
Other - net									$ 262	$ 256	$ 246
Effective Income Tax Rate									(19.30%)	38.90%	37.00%
Increase (Reduction) in income tax resulting from Act 55 financing settlement											$ (454)
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										(69)
Amortization of Excess ADIT									(58,971)
Revisions of the 2017 Tax Legislation Enactment									(3,565)
Settlement on Treatment of Regulatory Obligations									0
IRS Audit Adjustment									(12)
Consolidated net income (loss)	$ 25,442	$ 22,972	$ 23,387	$ 22,308	$ 18,316	$ 20,583	$ 19,350	$ 20,347	94,109	78,596	96,744
Income Tax Expense (Benefit)									(47,675)	69,969	71,061
Income before income taxes									46,434	148,565	167,805
Computed at statutory rate (35%)									9,751	51,998	58,732
State income taxes net of federal income tax effect									2,812	5,635	7,001
Regulatory differences - utility plant items									(2,510)	12,880	9,201
Equity component of AFUDC									(1,837)	(2,221)	(2,780)
Amortization of investment tax credits									(1,155)	(2,896)	(3,476)
Flow-through / permanent differences									2,815	(276)	(883)
Income Tax Reconciliation Provision For Uncertain Tax Positions									4,876	4,800	3,151
Other - net									$ 121	$ 118	$ 115
Effective Income Tax Rate									(102.70%)	47.10%	42.30%
Increase (Reduction) in income tax resulting from Act 55 financing settlement											$ 0
Effective Income Tax Rate Reconciliation, Noncontrolling Interest Income (Loss), Amount									$ 0	$ 0	$ 0