Consolidated Statements Of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	$ 3,353,532	$ 2,903,568	$ 9,020,440	$ 7,743,534
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	737,785	421,668	1,865,016	1,160,076
Nuclear refueling outage expenses	43,309	44,384	130,747	139,496
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	700,595	751,337	2,188,498	2,189,681
Asset Impairment Charges	(139)	4,461	345,226	16,332
Decommissioning	60,364	95,155	245,205	284,251
Taxes, Other	182,347	171,425	494,960	500,364
Other Depreciation and Amortization	421,745	401,578	1,257,809	1,205,057
Other regulatory charges (credits) - net	68,324	(29,380)	45,464	(62,306)
Costs and Expenses	2,525,662	2,125,552	7,516,363	6,126,450
OPERATING INCOME	827,870	778,016	1,504,077	1,617,084
OTHER INCOME
Allowance for equity funds used during construction	17,180	24,915	48,629	89,238
Investment Income, Net	75,112	127,857	289,757	195,826
Miscellaneous - net	(16,797)	(58,914)	(140,571)	(129,145)
TOTAL	75,495	93,858	197,815	155,919
INTEREST EXPENSE
Interest Expense, Debt	216,612	207,811	642,839	630,199
Allowance for borrowed funds used during construction	(7,112)	(11,080)	(20,088)	(38,667)
TOTAL	209,500	196,731	622,751	591,532
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	693,865	675,143	1,079,141	1,181,471
Income taxes	158,282	149,444	205,808	167,366
Consolidated net income	535,583	525,699	873,333	1,014,105
Net Income (Loss) Attributable to Noncontrolling Interest, Preferred Unit Holders	$ 4,580	$ 4,580	$ 13,739	$ 13,739
Earnings per average common share:
Basic (in dollars per share)	$ 2.64	$ 2.60	$ 4.28	$ 5.00
Diluted (in dollars per share)	$ 2.63	$ 2.59	$ 4.26	$ 4.98
Basic average number of common shares outstanding (in shares)	200,963,049	200,220,018	200,756,267	200,063,256
Diluted average number of common shares outstanding (in shares)	202,003,329	201,115,768	201,568,508	200,957,465
Net Income (Loss) Available to Common Stockholders, Basic	$ 531,003	$ 521,119	$ 859,594	$ 1,000,366
Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	3,159,969	2,666,805	8,339,764	6,907,999
Natural Gas, US Regulated [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	31,254	22,357	121,420	88,829
Competitive Businesses [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	162,309	214,406	559,256	746,706
Electricity, Purchased [Member]
Operation and Maintenance:
Cost of Goods and Services Sold	311,332	264,924	943,438	693,499
Entergy Mississippi [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	420,319	356,496	1,105,978	948,372
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	54,505	41,771	180,315	143,798
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	72,523	74,891	214,253	203,571
Taxes, Other	25,911	24,638	78,886	74,525
Other Depreciation and Amortization	57,130	52,486	168,324	155,937
Other regulatory charges (credits) - net	25,810	571	12,309	(9,806)
Costs and Expenses	321,126	262,653	871,817	745,643
OPERATING INCOME	99,193	93,843	234,161	202,729
OTHER INCOME
Allowance for equity funds used during construction	2,006	1,793	5,703	4,820
Investment Income, Net	1	13	50	268
Miscellaneous - net	(1,844)	(2,497)	(6,362)	(7,382)
TOTAL	163	(691)	(609)	(2,294)
INTEREST EXPENSE
Interest Expense, Debt	19,024	17,650	55,559	51,425
Allowance for borrowed funds used during construction	(849)	(773)	(2,378)	(1,958)
TOTAL	18,175	16,877	53,181	49,467
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	81,181	76,275	180,371	150,968
Income taxes	18,586	17,686	40,388	30,960
Consolidated net income	62,595	58,589	139,983	120,008
Entergy Mississippi [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	420,319	356,496	1,105,978	948,372
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	85,247	68,296	217,730	177,618
Entergy Arkansas [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	722,683	644,389	1,856,343	1,618,068
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	94,580	77,239	295,317	217,342
Nuclear refueling outage expenses	13,207	13,010	39,389	42,809
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	175,236	169,898	503,242	486,525
Decommissioning	19,567	18,449	57,847	54,596
Taxes, Other	36,892	34,379	96,741	92,611
Other Depreciation and Amortization	90,887	84,515	269,442	252,574
Other regulatory charges (credits) - net	31,988	(28,348)	(27,649)	(67,632)
Costs and Expenses	536,936	426,741	1,440,577	1,224,636
OPERATING INCOME	185,747	217,648	415,766	393,432
OTHER INCOME
Allowance for equity funds used during construction	4,113	3,876	10,714	10,671
Investment Income, Net	53,661	2,218	78,809	18,402
Miscellaneous - net	(4,805)	(4,465)	(15,968)	(17,034)
TOTAL	52,969	1,629	73,555	12,039
INTEREST EXPENSE
Interest Expense, Debt	35,452	36,902	104,862	108,494
Allowance for borrowed funds used during construction	(1,793)	(1,702)	(4,655)	(4,686)
TOTAL	33,659	35,200	100,207	103,808
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	205,057	184,077	389,114	301,663
Income taxes	50,166	48,234	84,593	61,055
Consolidated net income	154,891	135,843	304,521	240,608
Entergy Arkansas [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	722,683	644,389	1,856,343	1,618,068
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	74,579	57,599	206,248	145,811
Entergy Louisiana [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	1,420,708	1,120,022	3,795,950	3,062,321
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	421,464	162,981	922,060	469,083
Nuclear refueling outage expenses	11,932	13,796	37,407	41,080
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	239,132	244,136	752,214	693,010
Decommissioning	17,250	16,407	51,108	48,611
Taxes, Other	63,428	61,797	167,880	160,592
Other Depreciation and Amortization	165,469	154,162	489,343	453,552
Other regulatory charges (credits) - net	(1,920)	(17,822)	7,560	(25,892)
Costs and Expenses	1,093,228	795,526	3,000,602	2,314,634
OPERATING INCOME	327,480	324,496	795,348	747,687
OTHER INCOME
Allowance for equity funds used during construction	7,247	6,255	20,183	27,197
Investment Income, Net	39,225	61,487	171,197	135,625
Miscellaneous - net	(8,924)	(40,025)	(79,595)	(57,235)
TOTAL	37,548	27,717	111,785	105,587
INTEREST EXPENSE
Interest Expense, Debt	87,295	82,716	260,731	248,529
Allowance for borrowed funds used during construction	(3,278)	(3,256)	(9,105)	(13,590)
TOTAL	84,017	79,460	251,626	234,939
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	281,011	272,753	655,507	618,335
Income taxes	56,536	49,287	120,479	35,014
Consolidated net income	224,475	223,466	535,028	583,321
Earnings per average common share:
Net Income (Loss) Available to Common Stockholders, Basic	224,475	223,466	535,028	583,321
Entergy Louisiana [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	1,407,737	1,110,217	3,741,979	3,024,359
Entergy Louisiana [Member] | Natural Gas, US Regulated [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	12,971	9,805	53,971	37,962
Entergy Louisiana [Member] | Electricity, Purchased [Member]
Operation and Maintenance:
Cost of Goods and Services Sold	176,473	160,069	573,030	474,598
Entergy New Orleans [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	211,229	182,064	559,304	478,709
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	34,940	15,051	88,462	59,382
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	34,483	34,872	113,638	94,702
Taxes, Other	15,530	15,455	40,380	44,303
Other Depreciation and Amortization	18,444	16,134	54,758	46,835
Other regulatory charges (credits) - net	4,126	1,362	9,831	152
Costs and Expenses	182,883	149,742	508,276	426,694
OPERATING INCOME	28,346	32,322	51,028	52,015
OTHER INCOME
Allowance for equity funds used during construction	433	910	1,067	5,443
Investment Income, Net	18	13	32	109
Miscellaneous - net	(205)	(600)	(711)	(1,170)
TOTAL	246	323	388	4,382
INTEREST EXPENSE
Interest Expense, Debt	7,158	7,529	21,149	21,804
Allowance for borrowed funds used during construction	(192)	(438)	(475)	(2,618)
TOTAL	6,966	7,091	20,674	19,186
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	21,626	25,554	30,742	37,211
Income taxes	5,631	6,104	8,345	1,646
Consolidated net income	15,995	19,450	22,397	35,565
Entergy New Orleans [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	192,946	169,512	491,855	427,842
Entergy New Orleans [Member] | Natural Gas, US Regulated [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	18,283	12,552	67,449	50,867
Entergy New Orleans [Member] | Electricity, Purchased [Member]
Operation and Maintenance:
Cost of Goods and Services Sold	75,360	66,868	201,207	181,320
Entergy Texas [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	541,632	494,922	1,452,286	1,206,452
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	92,843	96,902	269,270	186,038
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	68,973	60,423	202,743	179,883
Taxes, Other	30,479	15,642	73,025	55,438
Other Depreciation and Amortization	54,711	45,195	159,234	131,596
Other regulatory charges (credits) - net	10,029	29,250	51,122	69,342
Costs and Expenses	412,758	386,616	1,181,178	1,005,643
OPERATING INCOME	128,874	108,306	271,108	200,809
OTHER INCOME
Allowance for equity funds used during construction	1,836	10,875	6,951	33,117
Investment Income, Net	204	203	632	975
Miscellaneous - net	(507)	2,061	(1,457)	924
TOTAL	1,533	13,139	6,126	35,016
INTEREST EXPENSE
Interest Expense, Debt	21,220	22,648	66,157	68,643
Allowance for borrowed funds used during construction	(738)	(4,673)	(2,797)	(14,231)
TOTAL	20,482	17,975	63,360	54,412
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	109,925	103,470	213,874	181,413
Income taxes	15,084	11,306	24,185	9,674
Consolidated net income	94,841	92,164	189,689	171,739
Net Income (Loss) Attributable to Noncontrolling Interest, Preferred Unit Holders	470	470	1,411	1,411
Earnings per average common share:
Net Income (Loss) Available to Common Stockholders, Basic	94,371	91,694	188,278	170,328
Entergy Texas [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	541,632	494,922	1,452,286	1,206,452
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	155,723	139,204	425,784	383,346
System Energy [Member]
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	15,279	13,620	46,211	32,771
Nuclear refueling outage expenses	6,867	6,942	20,377	20,880
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	54,709	48,902	154,716	132,175
Decommissioning	9,721	9,341	28,875	27,746
Taxes, Other	7,268	7,203	21,061	22,281
Other Depreciation and Amortization	25,991	28,006	79,953	82,406
Other regulatory charges (credits) - net	(1,707)	(14,393)	(7,707)	(28,470)
Costs and Expenses	118,128	99,621	343,486	289,789
OPERATING INCOME	36,191	48,896	89,892	115,441
OTHER INCOME
Allowance for equity funds used during construction	1,546	1,206	4,012	7,990
Investment Income, Net	11,839	1,303	36,871	18,749
Miscellaneous - net	(4,372)	(3,354)	(14,282)	(7,971)
TOTAL	9,013	(845)	26,601	18,768
INTEREST EXPENSE
Interest Expense, Debt	9,513	8,427	28,627	25,501
Allowance for borrowed funds used during construction	(261)	(240)	(678)	(1,585)
TOTAL	9,252	8,187	27,949	23,916
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	35,952	39,864	88,544	110,293
Income taxes	8,453	8,800	6,851	21,725
Consolidated net income	27,499	31,064	81,693	88,568
Earnings per average common share:
Net Income (Loss) Available to Common Stockholders, Basic	27,499	31,064	81,693	88,568
System Energy [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	$ 154,319	$ 148,517	$ 433,378	$ 405,230