Consolidated Statements Of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	$ 2,903,568	$ 3,140,575	$ 7,743,534	$ 8,416,367
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	421,668	596,939	1,160,076	1,542,592
Nuclear refueling outage expenses	44,384	52,044	139,496	153,447
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	751,337	805,696	2,189,681	2,430,617
Asset Impairment Charges	4,461	198,086	16,332	288,483
Decommissioning	95,155	101,811	284,251	308,557
Taxes, Other	171,425	165,731	500,364	487,715
Other Depreciation and Amortization	401,578	379,219	1,205,057	1,099,990
Other regulatory charges (credits) - net	(29,380)	4,781	(62,306)	(38,698)
Costs and Expenses	2,125,552	2,620,646	6,126,450	7,274,410
OPERATING INCOME	778,016	519,929	1,617,084	1,141,957
OTHER INCOME
Allowance for equity funds used during construction	24,915	33,161	89,238	108,546
Investment Income, Net	127,857	82,295	195,826	406,663
Miscellaneous - net	(58,914)	(50,086)	(129,145)	(160,614)
TOTAL	93,858	65,370	155,919	354,595
INTEREST EXPENSE
Interest Expense, Debt	207,811	201,412	630,199	603,517
Allowance for borrowed funds used during construction	(11,080)	(14,773)	(38,667)	(49,034)
TOTAL	196,731	186,639	591,532	554,483
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	675,143	398,660	1,181,471	942,069
Income taxes	149,444	29,201	167,366	73,430
Consolidated net income	525,699	369,459	1,014,105	868,639
Net Income (Loss) Attributable to Noncontrolling Interest, Preferred Unit Holders	$ 4,580	$ 4,219	$ 13,739	$ 12,438
Earnings per average common share:
Basic (in dollars per share)	$ 2.60	$ 1.84	$ 5.00	$ 4.42
Diluted (in dollars per share)	$ 2.59	$ 1.82	$ 4.98	$ 4.38
Basic average number of common shares outstanding (in shares)	200,220,018	198,932,387	200,063,256	193,876,557
Diluted average number of common shares outstanding (in shares)	201,115,768	200,492,935	200,957,465	195,685,851
Net Income (Loss) Available to Common Stockholders, Basic	$ 521,119	$ 365,240	$ 1,000,366	$ 856,201
Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	2,666,805	2,812,934	6,907,999	7,279,683
Natural Gas, US Regulated [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	22,357	27,269	88,829	112,916
Competitive Businesses [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	214,406	300,372	746,706	1,023,768
Electricity, Purchased [Member]
Operation and Maintenance:
Cost of Goods and Services Sold	264,924	316,339	693,499	1,001,707
Entergy Mississippi [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	356,496	398,732	948,372	983,713
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	41,771	87,386	143,798	188,006
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	74,891	69,253	203,571	195,357
Taxes, Other	24,638	26,673	74,525	78,613
Other Depreciation and Amortization	52,486	44,339	155,937	123,145
Other regulatory charges (credits) - net	571	5,771	(9,806)	11,708
Costs and Expenses	262,653	311,708	745,643	820,290
OPERATING INCOME	93,843	87,024	202,729	163,423
OTHER INCOME
Allowance for equity funds used during construction	1,793	2,079	4,820	6,341
Investment Income, Net	13	462	268	1,011
Miscellaneous - net	(2,497)	(1,648)	(7,382)	(2,238)
TOTAL	(691)	893	(2,294)	5,114
INTEREST EXPENSE
Interest Expense, Debt	17,650	15,922	51,425	45,804
Allowance for borrowed funds used during construction	(773)	(892)	(1,958)	(2,683)
TOTAL	16,877	15,030	49,467	43,121
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	76,275	72,887	150,968	125,416
Income taxes	17,686	16,650	30,960	27,114
Consolidated net income	58,589	56,237	120,008	98,302
Entergy Mississippi [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	356,496	398,732	948,372	983,713
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	68,296	78,286	177,618	223,461
Entergy Arkansas [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	644,389	687,526	1,618,068	1,776,267
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	77,239	109,779	217,342	370,534
Nuclear refueling outage expenses	13,010	17,381	42,809	51,823
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	169,898	188,299	486,525	542,765
Decommissioning	18,449	17,422	54,596	50,351
Taxes, Other	34,379	31,783	92,611	87,327
Other Depreciation and Amortization	84,515	78,594	252,574	231,502
Other regulatory charges (credits) - net	(28,348)	1,018	(67,632)	(8,873)
Costs and Expenses	426,741	505,350	1,224,636	1,481,846
OPERATING INCOME	217,648	182,176	393,432	294,421
OTHER INCOME
Allowance for equity funds used during construction	3,876	3,977	10,671	10,777
Investment Income, Net	2,218	8,788	18,402	19,193
Miscellaneous - net	(4,465)	(4,286)	(17,034)	(12,704)
TOTAL	1,629	8,479	12,039	17,266
INTEREST EXPENSE
Interest Expense, Debt	36,902	35,454	108,494	104,664
Allowance for borrowed funds used during construction	(1,702)	(1,641)	(4,686)	(4,384)
TOTAL	35,200	33,813	103,808	100,280
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	184,077	156,842	301,663	211,407
Income taxes	48,234	7,126	61,055	(27,729)
Consolidated net income	135,843	149,716	240,608	239,136
Entergy Arkansas [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	644,389	687,526	1,618,068	1,776,267
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	57,599	61,074	145,811	156,417
Entergy Louisiana [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	1,120,022	1,231,677	3,062,321	3,297,324
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	162,981	259,419	469,083	627,240
Nuclear refueling outage expenses	13,796	14,026	41,080	40,225
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	244,136	249,773	693,010	726,496
Decommissioning	16,407	15,606	48,611	43,544
Taxes, Other	61,797	49,602	160,592	145,942
Other Depreciation and Amortization	154,162	137,891	453,552	394,271
Other regulatory charges (credits) - net	(17,822)	(29,224)	(25,892)	(90,762)
Costs and Expenses	795,526	894,923	2,314,634	2,565,106
OPERATING INCOME	324,496	336,754	747,687	732,218
OTHER INCOME
Allowance for equity funds used during construction	6,255	14,609	27,197	59,194
Investment Income, Net	61,487	45,237	135,625	166,721
Miscellaneous - net	(40,025)	(15,067)	(57,235)	(79,717)
TOTAL	27,717	44,779	105,587	146,198
INTEREST EXPENSE
Interest Expense, Debt	82,716	78,350	248,529	230,684
Allowance for borrowed funds used during construction	(3,256)	(7,041)	(13,590)	(28,145)
TOTAL	79,460	71,309	234,939	202,539
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	272,753	310,224	618,335	675,877
Income taxes	49,287	54,964	35,014	109,900
Consolidated net income	223,466	255,260	583,321	565,977
Earnings per average common share:
Net Income (Loss) Available to Common Stockholders, Basic	223,466	255,260	583,321	565,977
Entergy Louisiana [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	1,110,217	1,221,874	3,024,359	3,252,826
Entergy Louisiana [Member] | Natural Gas, US Regulated [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	9,805	9,803	37,962	44,498
Entergy Louisiana [Member] | Electricity, Purchased [Member]
Operation and Maintenance:
Cost of Goods and Services Sold	160,069	197,830	474,598	678,150
Entergy New Orleans [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	182,064	194,204	478,709	533,191
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	15,051	27,013	59,382	84,963
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	34,872	32,755	94,702	95,305
Taxes, Other	15,455	15,142	44,303	41,819
Other Depreciation and Amortization	16,134	14,756	46,835	43,146
Other regulatory charges (credits) - net	1,362	7,571	152	9,716
Costs and Expenses	149,742	165,328	426,694	470,670
OPERATING INCOME	32,322	28,876	52,015	62,521
OTHER INCOME
Allowance for equity funds used during construction	910	2,793	5,443	7,769
Investment Income, Net	13	109	109	352
Miscellaneous - net	(600)	(1,019)	(1,170)	(3,467)
TOTAL	323	1,883	4,382	4,654
INTEREST EXPENSE
Interest Expense, Debt	7,529	6,046	21,804	18,001
Allowance for borrowed funds used during construction	(438)	(1,115)	(2,618)	(3,102)
TOTAL	7,091	4,931	19,186	14,899
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	25,554	25,828	37,211	52,276
Income taxes	6,104	920	1,646	5,342
Consolidated net income	19,450	24,908	35,565	46,934
Entergy New Orleans [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	169,512	176,738	427,842	464,773
Entergy New Orleans [Member] | Natural Gas, US Regulated [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	12,552	17,466	50,867	68,418
Entergy New Orleans [Member] | Electricity, Purchased [Member]
Operation and Maintenance:
Cost of Goods and Services Sold	66,868	68,091	181,320	195,721
Entergy Texas [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	494,922	442,877	1,206,452	1,146,931
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	96,902	64,211	186,038	129,285
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	60,423	69,937	179,883	190,989
Taxes, Other	15,642	20,870	55,438	60,773
Other Depreciation and Amortization	45,195	38,722	131,596	113,071
Other regulatory charges (credits) - net	29,250	27,662	69,342	66,574
Costs and Expenses	386,616	373,367	1,005,643	1,024,658
OPERATING INCOME	108,306	69,510	200,809	122,273
OTHER INCOME
Allowance for equity funds used during construction	10,875	7,454	33,117	18,948
Investment Income, Net	203	486	975	2,542
Miscellaneous - net	2,061	115	924	980
TOTAL	13,139	8,055	35,016	22,470
INTEREST EXPENSE
Interest Expense, Debt	22,648	21,379	68,643	63,992
Allowance for borrowed funds used during construction	(4,673)	(3,534)	(14,231)	(9,370)
TOTAL	17,975	17,845	54,412	54,622
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	103,470	59,720	181,413	90,121
Income taxes	11,306	(13,504)	9,674	(43,381)
Consolidated net income	92,164	73,224	171,739	133,502
Net Income (Loss) Attributable to Noncontrolling Interest, Preferred Unit Holders	470	110	1,411	110
Earnings per average common share:
Net Income (Loss) Available to Common Stockholders, Basic	91,694	73,114	170,328	133,392
Entergy Texas [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	494,922	442,877	1,206,452	1,146,931
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	139,204	151,965	383,346	463,966
System Energy [Member]
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	13,620	23,748	32,771	66,335
Nuclear refueling outage expenses	6,942	8,412	20,880	25,013
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	48,902	49,533	132,175	147,283
Decommissioning	9,341	8,976	27,746	26,663
Taxes, Other	7,203	7,120	22,281	21,835
Other Depreciation and Amortization	28,006	26,613	82,406	79,761
Other regulatory charges (credits) - net	(14,393)	(8,016)	(28,470)	(27,059)
Costs and Expenses	99,621	116,386	289,789	339,831
OPERATING INCOME	48,896	29,086	115,441	84,754
OTHER INCOME
Allowance for equity funds used during construction	1,206	2,251	7,990	5,518
Investment Income, Net	1,303	8,215	18,749	21,577
Miscellaneous - net	(3,354)	(1,300)	(7,971)	(4,018)
TOTAL	(845)	9,166	18,768	23,077
INTEREST EXPENSE
Interest Expense, Debt	8,427	8,546	25,501	26,467
Allowance for borrowed funds used during construction	(240)	(551)	(1,585)	(1,350)
TOTAL	8,187	7,995	23,916	25,117
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	39,864	30,257	110,293	82,714
Income taxes	8,800	5,226	21,725	9,633
Consolidated net income	31,064	25,031	88,568	73,081
Earnings per average common share:
Net Income (Loss) Available to Common Stockholders, Basic	31,064	25,031	88,568	73,081
System Energy [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	$ 148,517	$ 145,472	$ 405,230	$ 424,585