Consolidated Statements Of Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	$ 2,822,070	$ 2,412,788	$ 5,666,907	$ 4,839,967
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	626,064	341,005	1,127,231	738,408
Nuclear refueling outage expenses	43,700	44,894	87,438	95,112
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	781,118	736,261	1,487,904	1,438,345
Asset Impairment Charges	342,092	6,775	345,365	11,870
Decommissioning	86,199	95,413	184,841	189,097
Taxes, Other	155,911	158,646	312,613	328,940
Other Depreciation and Amortization	421,545	403,769	836,064	803,478
Other regulatory charges (credits) - net	(55,138)	(25,247)	(22,859)	(32,925)
Costs and Expenses	2,653,862	1,973,477	4,990,702	4,000,900
OPERATING INCOME	168,208	439,311	676,205	839,067
OTHER INCOME
Allowance for equity funds used during construction	16,873	28,370	31,449	64,324
Investment Income, Net	71,329	284,823	214,645	67,969
Miscellaneous - net	(62,844)	(93,620)	(123,773)	(70,232)
TOTAL	25,358	219,573	122,321	62,061
INTEREST EXPENSE
Interest Expense, Debt	220,340	216,799	426,226	422,388
Allowance for borrowed funds used during construction	(6,964)	(12,143)	(12,976)	(27,587)
TOTAL	213,376	204,656	413,250	394,801
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	(19,810)	454,228	385,276	506,327
Income taxes	(18,416)	89,115	47,526	17,921
Consolidated net income	(1,394)	365,113	337,750	488,406
Net Income (Loss) Attributable to Noncontrolling Interest, Preferred Unit Holders	$ 4,580	$ 4,580	$ 9,159	$ 9,159
Earnings (loss) per average common share:
Basic (in dollars per share)	$ (0.03)	$ 1.80	$ 1.64	$ 2.40
Diluted (in dollars per share)	$ (0.03)	$ 1.79	$ 1.63	$ 2.39
Basic average number of common shares outstanding (in shares)	200,775,395	200,178,010	200,651,162	199,984,013
Diluted average number of common shares outstanding (in shares)	200,775,395	200,886,749	201,352,830	200,891,134
Net Income (Loss) Available to Common Stockholders, Basic	$ (5,974)	$ 360,533	$ 328,591	$ 479,247
Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	2,641,375	2,190,557	5,179,794	4,241,196
Natural Gas, US Regulated [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	31,998	22,495	90,166	66,471
Competitive Businesses [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	148,697	199,736	396,947	532,300
Electricity, Purchased [Member]
Operation and Maintenance:
Cost of Goods and Services Sold	252,371	211,961	632,105	428,575
Entergy Mississippi [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	349,040	297,954	685,659	591,876
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	65,613	38,730	125,810	102,027
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	73,899	66,343	141,730	128,680
Taxes, Other	27,076	22,697	52,975	49,887
Other Depreciation and Amortization	56,158	52,296	111,194	103,451
Other regulatory charges (credits) - net	(21,630)	(6,496)	(13,501)	(10,377)
Costs and Expenses	265,008	230,249	550,691	482,990
OPERATING INCOME	84,032	67,705	134,968	108,886
OTHER INCOME
Allowance for equity funds used during construction	2,029	1,588	3,697	3,027
Investment Income, Net	7	135	49	255
Miscellaneous - net	(2,205)	(2,589)	(4,518)	(4,885)
TOTAL	(169)	(866)	(772)	(1,603)
INTEREST EXPENSE
Interest Expense, Debt	18,922	17,192	36,535	33,775
Allowance for borrowed funds used during construction	(852)	(634)	(1,529)	(1,185)
TOTAL	18,070	16,558	35,006	32,590
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	65,793	50,281	99,190	74,693
Income taxes	14,377	11,388	21,802	13,274
Consolidated net income	51,416	38,893	77,388	61,419
Entergy Mississippi [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	349,040	297,954	685,659	591,876
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	63,892	56,679	132,483	109,322
Entergy Arkansas [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	550,274	491,767	1,133,660	973,679
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	74,556	52,692	200,737	140,103
Nuclear refueling outage expenses	13,535	13,552	26,182	29,799
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	173,098	164,770	328,006	316,627
Decommissioning	19,280	18,206	38,280	36,147
Taxes, Other	30,106	27,172	59,849	58,232
Other Depreciation and Amortization	90,276	84,538	178,555	168,059
Other regulatory charges (credits) - net	(22,170)	(19,283)	(59,637)	(39,284)
Costs and Expenses	440,129	383,818	903,641	797,895
OPERATING INCOME	110,145	107,949	230,019	175,784
OTHER INCOME
Allowance for equity funds used during construction	3,608	3,878	6,601	6,795
Investment Income, Net	(2,739)	8,246	25,148	16,184
Miscellaneous - net	(5,372)	(6,133)	(11,163)	(12,569)
TOTAL	(4,503)	5,991	20,586	10,410
INTEREST EXPENSE
Interest Expense, Debt	35,624	35,969	69,410	71,592
Allowance for borrowed funds used during construction	(1,572)	(1,703)	(2,862)	(2,984)
TOTAL	34,052	34,266	66,548	68,608
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	71,590	79,674	184,057	117,586
Income taxes	14,997	19,504	34,427	12,821
Consolidated net income	56,593	60,170	149,630	104,765
Entergy Arkansas [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	550,274	491,767	1,133,660	973,679
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	61,448	42,171	131,669	88,212
Entergy Louisiana [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	1,267,598	1,011,652	2,375,242	1,942,299
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	355,362	161,610	500,596	306,102
Nuclear refueling outage expenses	12,193	13,654	25,475	27,284
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	275,599	226,216	513,082	448,874
Decommissioning	17,035	16,203	33,858	32,204
Taxes, Other	51,968	48,718	104,452	98,795
Other Depreciation and Amortization	163,061	154,255	323,874	299,390
Other regulatory charges (credits) - net	(21,617)	(19,202)	9,480	(8,070)
Costs and Expenses	1,040,197	755,240	1,907,374	1,519,108
OPERATING INCOME	227,401	256,412	467,868	423,191
OTHER INCOME
Allowance for equity funds used during construction	6,835	6,055	12,936	20,942
Investment Income, Net	59,457	93,807	131,972	74,138
Miscellaneous - net	(36,033)	(66,811)	(70,671)	(17,210)
TOTAL	30,259	33,051	74,237	77,870
INTEREST EXPENSE
Interest Expense, Debt	90,630	86,296	173,436	165,813
Allowance for borrowed funds used during construction	(3,068)	(3,202)	(5,827)	(10,334)
TOTAL	87,562	83,094	167,609	155,479
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	170,098	206,369	374,496	345,582
Income taxes	26,171	35,910	63,943	(14,273)
Consolidated net income	143,927	170,459	310,553	359,855
Earnings (loss) per average common share:
Net Income (Loss) Available to Common Stockholders, Basic	143,927	170,459	310,553	359,855
Entergy Louisiana [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	1,254,579	1,001,601	2,334,242	1,914,142
Entergy Louisiana [Member] | Natural Gas, US Regulated [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	13,019	10,051	41,000	28,157
Entergy Louisiana [Member] | Electricity, Purchased [Member]
Operation and Maintenance:
Cost of Goods and Services Sold	186,596	153,786	396,557	314,529
Entergy New Orleans [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	178,740	147,343	348,075	296,645
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	34,510	16,836	53,522	44,331
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	40,977	29,126	79,155	59,830
Taxes, Other	12,294	15,642	24,850	28,848
Other Depreciation and Amortization	18,153	15,626	36,314	30,701
Other regulatory charges (credits) - net	2,575	4,526	5,705	(1,210)
Costs and Expenses	165,686	139,741	325,393	276,952
OPERATING INCOME	13,054	7,602	22,682	19,693
OTHER INCOME
Allowance for equity funds used during construction	376	2,048	634	4,533
Investment Income, Net	5	43	14	96
Miscellaneous - net	(204)	168	(506)	(570)
TOTAL	177	2,259	142	4,059
INTEREST EXPENSE
Interest Expense, Debt	6,962	7,635	13,991	14,275
Allowance for borrowed funds used during construction	(167)	(985)	(283)	(2,180)
TOTAL	6,795	6,650	13,708	12,095
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	6,436	3,211	9,116	11,657
Income taxes	1,805	(1,718)	2,714	(4,458)
Consolidated net income	4,631	4,929	6,402	16,115
Entergy New Orleans [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	159,761	134,899	298,909	258,330
Entergy New Orleans [Member] | Natural Gas, US Regulated [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	18,979	12,444	49,166	38,315
Entergy New Orleans [Member] | Electricity, Purchased [Member]
Operation and Maintenance:
Cost of Goods and Services Sold	57,177	57,985	125,847	114,452
Entergy Texas [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	430,434	372,194	910,654	711,530
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	64,031	47,790	176,427	89,136
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	70,815	60,527	133,770	119,460
Taxes, Other	20,671	20,524	42,546	39,796
Other Depreciation and Amortization	53,587	43,835	104,523	86,401
Other regulatory charges (credits) - net	25,253	18,724	41,093	40,092
Costs and Expenses	363,056	315,751	768,420	619,027
OPERATING INCOME	67,378	56,443	142,234	92,503
OTHER INCOME
Allowance for equity funds used during construction	2,670	11,601	5,115	22,242
Investment Income, Net	204	343	428	772
Miscellaneous - net	(527)	(791)	(950)	(1,137)
TOTAL	2,347	11,153	4,593	21,877
INTEREST EXPENSE
Interest Expense, Debt	21,899	23,137	44,937	45,995
Allowance for borrowed funds used during construction	(1,075)	(4,985)	(2,059)	(9,558)
TOTAL	20,824	18,152	42,878	36,437
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	48,901	49,444	103,949	77,943
Income taxes	4,111	2,576	9,101	(1,632)
Consolidated net income	44,790	46,868	94,848	79,575
Net Income (Loss) Attributable to Noncontrolling Interest, Preferred Unit Holders	471	471	941	941
Earnings (loss) per average common share:
Net Income (Loss) Available to Common Stockholders, Basic	44,319	46,397	93,907	78,634
Entergy Texas [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	430,434	372,194	910,654	711,530
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	128,699	124,351	270,061	244,142
System Energy [Member]
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	14,073	6,008	30,932	19,151
Nuclear refueling outage expenses	6,792	5,666	13,510	13,938
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	58,047	42,802	100,007	83,273
Decommissioning	9,625	9,248	19,154	18,405
Taxes, Other	6,968	7,105	13,793	15,078
Other Depreciation and Amortization	25,768	27,501	53,962	54,400
Other regulatory charges (credits) - net	(17,550)	(3,517)	(6,000)	(14,077)
Costs and Expenses	103,723	94,813	225,358	190,168
OPERATING INCOME	57,590	31,236	53,701	66,545
OTHER INCOME
Allowance for equity funds used during construction	1,355	3,200	2,466	6,784
Investment Income, Net	(2,410)	12,108	25,032	17,446
Miscellaneous - net	(7,886)	(2,157)	(9,910)	(4,617)
TOTAL	(8,941)	13,151	17,588	19,613
INTEREST EXPENSE
Interest Expense, Debt	9,579	8,534	19,114	17,074
Allowance for borrowed funds used during construction	(229)	(634)	(417)	(1,345)
TOTAL	9,350	7,900	18,697	15,729
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	39,299	36,487	52,592	70,429
Income taxes	8,969	7,496	(1,602)	12,925
Consolidated net income	30,330	28,991	54,194	57,504
Earnings (loss) per average common share:
Net Income (Loss) Available to Common Stockholders, Basic	30,330	28,991	54,194	57,504
System Energy [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	$ 161,313	$ 126,049	$ 279,059	$ 256,713