Income Taxes (Schedule Of Statutory Income Tax Rate To Income Before Taxes) (Details) - USD ($) $ in Thousands	3 Months Ended									12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revisions of the 2017 Tax Legislation Enactment										$ 0	$ 0	$ (40,494)
Utility Restructuring									$ (170,000)	0	0	(169,918)
Settlement on Treatment of Regulatory Obligations										0	0	(52,320)
State Income Tax Audit Conclusion										0	0	(23,425)
IRS Audit Adjustment										(301,041)	0	(8,404)
Increase (Decrease) due to Entergy Wholesale Commodities Decommissioning Trust Fund Restructuring										0	0	(106,833)
Net Income (Loss) Attributable to Parent										1,388,334	1,241,226	848,661
Noncontrolling Interest in Net Income (Loss) Preferred Unit Holders, Redeemable										18,319	17,018	13,894
Consolidated net income	$ 392,547	$ 525,699	$ 365,113	$ 123,294	$ 389,606	$ 369,459	$ 240,533	$ 258,646		1,406,653	1,258,244	862,555
Income Tax Expense (Benefit)										(121,506)	(169,825)	(1,036,826)
Income before income taxes										1,285,147	1,088,419	(174,271)
Computed at statutory rate (35%)										269,881	228,568	(36,597)
State income taxes net of federal income tax effect										60,087	61,791	21,398
Regulatory differences - utility plant items										(53,229)	(45,336)	(37,507)
Equity component of AFUDC										(25,080)	(30,444)	(27,216)
Amortization of investment tax credits										(8,386)	(8,093)	(8,304)
Flow-through / permanent differences										11,099	(2,059)	439
Amortization of Excess ADIT										(59,629)	(205,614)	(577,082)
Income Tax Reconciliation Provision For Uncertain Tax Positions										15,208	7,332	24,569
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount										0	59,345	2,211
Other - net										$ 4,398	$ (1,062)	$ 2,657
Effective Income Tax Rate										(9.50%)	(15.60%)	595.00%
Increase (Reduction) in income tax resulting from Entergy Wholesale Commodities restructuring										$ (9,223)	$ (173,725)	$ 0
Effective Income Tax Rate Reconciliation, Fitzpatrick Disposition, Amount										25,591	0	0
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Charitable Contributions, Amount										0	19,101	0
Net operating loss recognition										0	(41,427)	0
Entergy Arkansas [Member]
Revisions of the 2017 Tax Legislation Enactment												933
Settlement on Treatment of Regulatory Obligations												0
IRS Audit Adjustment										(6,351)		1,290
Noncontrolling Interest in Net Income (Loss) Preferred Unit Holders, Redeemable										0	0	1,249
Consolidated net income	4,624	135,843	60,170	44,595	23,828	149,716	50,299	39,121		245,232	262,964	252,707
Income Tax Expense (Benefit)										47,777	(46,769)	(297,067)
Income before income taxes										293,009	216,195	(44,360)
Computed at statutory rate (35%)										61,532	45,401	(9,316)
State income taxes net of federal income tax effect										16,256	15,954	(794)
Regulatory differences - utility plant items										(8,034)	(10,627)	(14,916)
Equity component of AFUDC										(3,154)	(3,255)	(3,477)
Amortization of investment tax credits										(1,201)	(1,201)	(1,201)
Flow-through / permanent differences										(2,219)	696	570
Amortization of Excess ADIT										(6,011)	(90,921)	271,570
Income Tax Reconciliation Provision For Uncertain Tax Positions										1,200	(3,517)	724
Other - net										$ 711	$ 701	$ 690
Effective Income Tax Rate										16.30%	(21.60%)	669.70%
Effective Income Tax Rate Reconciliation, Fitzpatrick Disposition, Amount										$ 4,952
Effective Income Tax Rate Reconciliation, Noncontrolling Interest Income (Loss), Amount										0	$ 0	$ 0
Entergy Louisiana [Member]
Revisions of the 2017 Tax Legislation Enactment												(2,810)
Settlement on Treatment of Regulatory Obligations												(52,320)
IRS Audit Adjustment										(471,702)		1,097
Consolidated net income	499,031	223,466	170,459	189,396	125,560	255,260	183,084	127,633		1,082,352	691,537	675,614
Income Tax Expense (Benefit)										(382,324)	121,623	(54,611)
Income before income taxes										700,028	813,160	621,003
Computed at statutory rate (35%)										147,006	170,764	130,411
State income taxes net of federal income tax effect										38,182	42,854	26,031
Regulatory differences - utility plant items										(23,819)	(19,421)	(12,604)
Equity component of AFUDC										(8,012)	(15,545)	(16,784)
Amortization of investment tax credits										(4,811)	(4,871)	(4,871)
Flow-through / permanent differences										1,404	439	3,203
Amortization of Excess ADIT										(26,293)	(28,531)	104,313
Income Tax Reconciliation Provision For Uncertain Tax Positions										300	1,519	3,949
Other - net										$ 1,220	$ 1,210	$ 1,195
Effective Income Tax Rate										(54.60%)	15.00%	(8.80%)
Effective Income Tax Rate Reconciliation, Fitzpatrick Disposition, Amount										$ 9,004
Effective Income Tax Rate Reconciliation, Noncontrolling Interest Income (Loss), Amount										(26,795)	$ (26,795)	$ (26,795)
Entergy Mississippi [Member]
Revisions of the 2017 Tax Legislation Enactment												(556)
Settlement on Treatment of Regulatory Obligations												0
IRS Audit Adjustment										(3,768)		1,018
Noncontrolling Interest in Net Income (Loss) Preferred Unit Holders, Redeemable										0	0	834
Consolidated net income	20,575	58,589	38,893	22,526	21,623	56,237	26,667	15,398		140,583	119,925	126,078
Income Tax Expense (Benefit)										27,190	30,866	(125,773)
Income before income taxes										167,773	150,791	305
Computed at statutory rate (35%)										35,232	31,666	64
State income taxes net of federal income tax effect										6,917	5,563	(1,747)
Regulatory differences - utility plant items										(7,441)	(5,556)	(4,103)
Equity component of AFUDC										(1,412)	(1,755)	(1,829)
Amortization of investment tax credits										(540)	(160)	(160)
Flow-through / permanent differences										(102)	160	1,893
Amortization of Excess ADIT										18	203	120,831
Income Tax Reconciliation Provision For Uncertain Tax Positions										800	500	240
Other - net										$ 249	$ 245	$ 238
Effective Income Tax Rate										16.20%	20.50%	(41237.00%)
Effective Income Tax Rate Reconciliation, Fitzpatrick Disposition, Amount										$ 2,763
Effective Income Tax Rate Reconciliation, Noncontrolling Interest Income (Loss), Amount										0	$ 0	$ 0
Entergy New Orleans [Member]
Revisions of the 2017 Tax Legislation Enactment												884
Settlement on Treatment of Regulatory Obligations												0
IRS Audit Adjustment										(6,819)		(96)
Consolidated net income	13,773	19,450	4,929	11,186	5,695	24,908	13,003	9,023		49,338	52,629	53,152
Income Tax Expense (Benefit)										(4,207)	186	(2,436)
Income before income taxes										45,131	52,815	50,716
Computed at statutory rate (35%)										9,478	11,091	10,650
State income taxes net of federal income tax effect										2,606	3,443	2,322
Regulatory differences - utility plant items										(3,442)	(1,532)	(1,502)
Equity component of AFUDC										(1,331)	(2,088)	(1,248)
Amortization of investment tax credits										(61)	(88)	(109)
Flow-through / permanent differences										498	(741)	(4,222)
Amortization of Excess ADIT										(4,564)	(11,724)	9,878
Income Tax Reconciliation Provision For Uncertain Tax Positions										800	1,672	613
Other - net										$ 154	$ 153	$ 150
Effective Income Tax Rate										(9.30%)	0.40%	(4.80%)
Effective Income Tax Rate Reconciliation, Fitzpatrick Disposition, Amount										$ 1,526
Effective Income Tax Rate Reconciliation, Noncontrolling Interest Income (Loss), Amount										0	$ 0	$ 0
Entergy Texas [Member]
Revisions of the 2017 Tax Legislation Enactment												(43,799)
Settlement on Treatment of Regulatory Obligations												0
IRS Audit Adjustment										(2,091)		524
Noncontrolling Interest in Net Income (Loss) Preferred Unit Holders, Redeemable										1,882	580	0
Consolidated net income	43,334	92,164	46,868	32,707	25,895	73,224	38,936	21,342		215,073	159,397	162,235
Income Tax Expense (Benefit)										3,042	(53,896)	(26,243)
Income before income taxes										218,115	105,501	135,992
Computed at statutory rate (35%)										45,804	22,155	28,558
State income taxes net of federal income tax effect										1,460	360	2,576
Regulatory differences - utility plant items										(7,673)	(1,987)	(1,872)
Equity component of AFUDC										(9,255)	(5,973)	(2,042)
Amortization of investment tax credits										(617)	(617)	(808)
Flow-through / permanent differences										766	560	1,038
Amortization of Excess ADIT										(22,780)	(69,091)	11,519
Income Tax Reconciliation Provision For Uncertain Tax Positions										0	430	839
Other - net										$ 270	$ 267	$ 262
Effective Income Tax Rate										1.40%	(51.10%)	(19.30%)
Effective Income Tax Rate Reconciliation, Fitzpatrick Disposition, Amount										$ 2,842
Effective Income Tax Rate Reconciliation, Noncontrolling Interest Income (Loss), Amount										0	$ 0	$ 0
System Energy [Member]
Revisions of the 2017 Tax Legislation Enactment												(3,565)
Settlement on Treatment of Regulatory Obligations												0
IRS Audit Adjustment										(2,925)		(12)
Consolidated net income	$ 10,563	$ 31,064	$ 28,991	$ 28,513	$ 26,039	$ 25,031	$ 24,472	$ 23,578		99,131	99,120	94,109
Income Tax Expense (Benefit)										20,543	15,349	(47,675)
Income before income taxes										119,674	114,469	46,434
Computed at statutory rate (35%)										25,132	24,039	9,751
State income taxes net of federal income tax effect										5,524	5,134	2,812
Regulatory differences - utility plant items										(2,821)	(6,213)	(2,510)
Equity component of AFUDC										(1,916)	(1,829)	(1,837)
Amortization of investment tax credits										(1,155)	(1,155)	(1,155)
Flow-through / permanent differences										(421)	(500)	2,815
Amortization of Excess ADIT										0	(5,550)	58,971
Income Tax Reconciliation Provision For Uncertain Tax Positions										300	1,300	4,876
Other - net										$ 125	$ 123	$ 121
Effective Income Tax Rate										17.20%	13.40%	(102.70%)
Effective Income Tax Rate Reconciliation, Fitzpatrick Disposition, Amount										$ 1,300
Effective Income Tax Rate Reconciliation, Noncontrolling Interest Income (Loss), Amount										$ 0	$ 0	$ 0