Consolidated Statements Of Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	$ 2,666,209	$ 2,668,770	$ 5,275,792	$ 5,392,650
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	467,323	465,802	945,653	909,098
Nuclear refueling outage expenses	50,962	35,360	101,403	78,120
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	841,870	840,103	1,624,921	1,623,687
Asset Impairment Charges	16,419	68,943	90,397	141,867
Decommissioning	104,627	97,605	206,746	192,005
Taxes, Other	163,408	158,547	321,983	323,765
Other Depreciation and Amortization	363,496	350,485	720,770	697,471
Other regulatory charges (credits) - net	(26,532)	143,294	(43,478)	186,319
Costs and Expenses	2,327,434	2,577,173	4,653,763	4,965,390
OPERATING INCOME	338,775	91,597	622,029	427,260
OTHER INCOME
Allowance for equity funds used during construction	37,169	31,670	75,385	60,014
Investment Income, Net	96,218	71,134	324,367	88,005
Miscellaneous - net	(45,870)	(48,491)	(110,527)	(79,849)
TOTAL	87,517	54,313	289,225	68,170
INTEREST EXPENSE
Interest expense	201,112	192,314	402,105	375,237
Allowance for borrowed funds used during construction	(16,811)	(14,668)	(34,260)	(27,933)
TOTAL	184,301	177,646	367,845	347,304
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	241,991	(31,736)	543,409	148,126
Income taxes	1,458	(280,596)	44,229	(236,933)
Net Income (Loss) Attributable to Noncontrolling Interest, Preferred Unit Holders	4,109	3,439	8,219	6,878
Net Income (Loss) Available to Common Stockholders, Basic	$ 236,424	$ 245,421	$ 490,961	$ 378,181
Earnings per average common share:
Basic (in dollars per share)	$ 1.22	$ 1.36	$ 2.57	$ 2.09
Diluted (in dollars per share)	$ 1.22	$ 1.34	$ 2.54	$ 2.08
Basic average number of common shares outstanding (in shares)	193,019,269	180,823,203	191,306,742	180,765,708
Diluted average number of common shares outstanding (in shares)	194,238,315	182,982,630	193,243,287	182,208,328
Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	$ 2,345,727	$ 2,330,225	$ 4,466,751	$ 4,578,486
Natural Gas, US Regulated [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	30,699	29,943	85,647	86,638
Competitive Businesses [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	289,783	308,602	723,394	727,526
Electricity, Purchased [Member]
Operation and Maintenance:
Cost of Goods and Services Sold	345,861	417,034	685,368	813,058
Entergy Arkansas [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	542,929	494,605	1,088,741	1,045,629
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	108,596	106,496	260,755	214,802
Nuclear refueling outage expenses	17,194	19,159	34,442	42,561
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	188,006	177,792	354,466	347,150
Decommissioning	17,168	14,985	32,929	29,745
Taxes, Other	27,181	24,445	55,544	52,350
Other Depreciation and Amortization	77,061	72,701	152,908	144,682
Other regulatory charges (credits) - net	(10,336)	(12,313)	(9,891)	(15,620)
Costs and Expenses	473,155	468,104	976,496	952,481
OPERATING INCOME	69,774	26,501	112,245	93,148
OTHER INCOME
Allowance for equity funds used during construction	3,372	4,471	6,800	8,479
Investment Income, Net	4,222	2,478	10,405	9,292
Miscellaneous - net	(4,728)	(3,881)	(8,418)	(7,752)
TOTAL	2,866	3,068	8,787	10,019
INTEREST EXPENSE
Interest expense	35,827	30,917	69,210	60,683
Allowance for borrowed funds used during construction	(1,329)	(2,108)	(2,743)	(3,998)
TOTAL	34,498	28,809	66,467	56,685
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	38,142	760	54,565	46,482
Income taxes	(12,157)	(81,796)	(34,855)	(72,329)
Net Income (Loss) Attributable to Noncontrolling Interest, Preferred Unit Holders	0	357	0	714
Net Income (Loss) Available to Common Stockholders, Basic	50,299	82,199	89,420	118,097
Entergy Arkansas [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	542,929	494,605	1,088,741	1,045,629
Entergy Arkansas [Member] | Natural Gas, US Regulated [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0	0
Entergy Arkansas [Member] | Electricity, Purchased [Member]
Operation and Maintenance:
Cost of Goods and Services Sold	48,285	64,839	95,343	136,811
Entergy Louisiana [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	1,106,317	1,072,788	2,065,647	2,102,132
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	220,472	200,528	367,821	381,309
Nuclear refueling outage expenses	13,391	12,671	26,199	25,770
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	250,835	250,994	476,723	485,374
Decommissioning	14,059	13,480	27,938	26,252
Taxes, Other	46,658	47,147	96,340	98,427
Other Depreciation and Amortization	130,246	122,177	256,380	242,920
Other regulatory charges (credits) - net	(33,878)	9,017	(61,538)	32,214
Costs and Expenses	864,797	922,628	1,670,183	1,810,652
OPERATING INCOME	241,520	150,160	395,464	291,480
OTHER INCOME
Allowance for equity funds used during construction	20,671	19,124	44,585	36,869
Investment Income, Net	49,498	46,853	121,484	90,128
Miscellaneous - net	(22,306)	(22,770)	(64,650)	(30,435)
TOTAL	47,863	43,207	101,419	96,562
INTEREST EXPENSE
Interest expense	77,631	73,582	152,334	143,678
Allowance for borrowed funds used during construction	(9,737)	(9,451)	(21,104)	(18,214)
TOTAL	67,894	64,131	131,230	125,464
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	221,489	129,236	365,653	262,578
Income taxes	38,405	(55,122)	54,936	(33,374)
Net Income (Loss) Available to Common Stockholders, Basic	183,084	184,358	310,717	295,952
Entergy Louisiana [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	1,094,259	1,061,689	2,030,952	2,066,795
Entergy Louisiana [Member] | Natural Gas, US Regulated [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	12,058	11,099	34,695	35,337
Entergy Louisiana [Member] | Electricity, Purchased [Member]
Operation and Maintenance:
Cost of Goods and Services Sold	223,014	266,614	480,320	518,386
Entergy Mississippi [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	302,737	353,689	584,981	669,432
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	47,391	65,663	100,620	129,191
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	66,921	64,585	126,104	124,043
Taxes, Other	25,813	23,794	51,940	49,188
Other Depreciation and Amortization	39,718	38,359	78,806	76,541
Other regulatory charges (credits) - net	3,567	127,935	5,937	128,228
Costs and Expenses	257,130	417,490	508,582	691,801
OPERATING INCOME	45,607	(63,801)	76,399	(22,369)
OTHER INCOME
Allowance for equity funds used during construction	2,349	2,122	4,262	4,100
Investment Income, Net	397	0	549	25
Miscellaneous - net	(327)	(1,411)	(590)	(1,982)
TOTAL	2,419	711	4,221	2,143
INTEREST EXPENSE
Interest expense	15,342	14,061	29,882	27,966
Allowance for borrowed funds used during construction	(1,006)	(890)	(1,791)	(1,718)
TOTAL	14,336	13,171	28,091	26,248
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	33,690	(76,261)	52,529	(46,474)
Income taxes	7,023	(114,503)	10,464	(107,559)
Net Income (Loss) Attributable to Noncontrolling Interest, Preferred Unit Holders	0	239	0	477
Net Income (Loss) Available to Common Stockholders, Basic	26,667	38,003	42,065	60,608
Entergy Mississippi [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	302,737	353,689	584,981	669,432
Entergy Mississippi [Member] | Natural Gas, US Regulated [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0	0
Entergy Mississippi [Member] | Electricity, Purchased [Member]
Operation and Maintenance:
Cost of Goods and Services Sold	73,720	97,154	145,175	184,610
Entergy New Orleans [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	175,793	178,446	338,987	366,721
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	27,190	15,366	57,950	39,105
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	32,252	28,420	62,550	56,719
Taxes, Other	13,135	12,851	26,677	27,983
Other Depreciation and Amortization	14,226	13,950	28,390	27,697
Other regulatory charges (credits) - net	4,500	6,127	2,145	12,460
Costs and Expenses	158,284	150,503	305,342	320,909
OPERATING INCOME	17,509	27,943	33,645	45,812
OTHER INCOME
Allowance for equity funds used during construction	2,686	1,217	4,976	2,068
Investment Income, Net	64	207	243	300
Miscellaneous - net	(942)	(1,404)	(2,448)	(1,741)
TOTAL	1,808	20	2,771	627
INTEREST EXPENSE
Interest expense	6,019	5,269	11,955	10,548
Allowance for borrowed funds used during construction	(1,073)	(450)	(1,987)	(764)
TOTAL	4,946	4,819	9,968	9,784
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	14,371	23,144	26,448	36,655
Income taxes	1,368	4,875	4,422	7,504
Entergy New Orleans [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	157,152	159,602	288,035	315,420
Entergy New Orleans [Member] | Natural Gas, US Regulated [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	18,641	18,844	50,952	51,301
Entergy New Orleans [Member] | Electricity, Purchased [Member]
Operation and Maintenance:
Cost of Goods and Services Sold	66,981	73,789	127,630	156,945
Entergy Texas [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	363,580	403,486	704,054	752,426
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	16,971	57,089	65,074	75,795
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	61,426	59,848	121,052	112,522
Taxes, Other	21,263	20,306	39,903	40,709
Other Depreciation and Amortization	37,312	31,141	74,349	61,907
Other regulatory charges (credits) - net	19,453	25,897	38,912	51,514
Costs and Expenses	327,558	344,849	651,291	652,707
OPERATING INCOME	36,022	58,637	52,763	99,719
OTHER INCOME
Allowance for equity funds used during construction	6,413	1,833	11,494	3,494
Investment Income, Net	374	542	2,056	1,097
Miscellaneous - net	1,228	(735)	865	(622)
TOTAL	8,015	1,640	14,415	3,969
INTEREST EXPENSE
Interest expense	20,153	21,835	42,613	43,886
Allowance for borrowed funds used during construction	(3,256)	(1,033)	(5,836)	(1,971)
TOTAL	16,897	20,802	36,777	41,915
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	27,140	39,475	30,401	61,773
Income taxes	(11,796)	8,686	(29,877)	13,634
Net Income (Loss) Available to Common Stockholders, Basic	38,936	30,789	60,278	48,139
Entergy Texas [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	363,580	403,486	704,054	752,426
Entergy Texas [Member] | Natural Gas, US Regulated [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0	0
Entergy Texas [Member] | Electricity, Purchased [Member]
Operation and Maintenance:
Cost of Goods and Services Sold	171,133	150,568	312,001	310,260
System Energy [Member]
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	21,026	2,030	42,587	30,455
Nuclear refueling outage expenses	8,415	2,820	16,601	6,792
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	52,468	48,695	97,750	94,034
Decommissioning	8,888	8,541	17,687	16,998
Taxes, Other	7,176	6,866	14,715	13,963
Other Depreciation and Amortization	26,574	33,467	53,148	66,788
Other regulatory charges (credits) - net	(9,838)	(13,369)	(19,043)	(22,478)
Costs and Expenses	114,709	89,050	223,445	206,552
OPERATING INCOME	24,300	23,406	55,668	54,347
OTHER INCOME
Allowance for equity funds used during construction	1,678	2,904	3,267	5,004
Investment Income, Net	6,371	2,943	13,362	9,829
Miscellaneous - net	(1,490)	(1,794)	(2,718)	(2,970)
TOTAL	6,559	4,053	13,911	11,863
INTEREST EXPENSE
Interest expense	8,524	9,656	17,921	18,981
Allowance for borrowed funds used during construction	(410)	(736)	(799)	(1,268)
TOTAL	8,114	8,920	17,122	17,713
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	22,745	18,539	52,457	48,497
Income taxes	(1,727)	(4,848)	4,407	2,802
Net Income (Loss) Available to Common Stockholders, Basic	24,472	23,387	48,050	45,695
System Energy [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	$ 139,009	$ 112,456	$ 279,113	$ 260,899