Consolidated Statements Of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	$ 11,009,452	$ 11,074,481	$ 10,845,645
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	2,147,793	1,991,589	1,809,200
Nuclear refueling outage expenses	153,826	168,151	208,678
Operation and maintenance expense	3,346,397	3,306,694	3,225,477
Asset Impairment Charges	532,321	538,372	2,835,637
Decommissioning	388,508	405,685	327,425
Taxes, Other	641,952	617,556	592,502
Other Depreciation and Amortization	1,369,442	1,389,978	1,347,187
Other regulatory charges (credits) - net	301,049	(131,901)	94,243
Costs and Expenses	10,540,087	9,714,074	11,660,876
OPERATING INCOME (LOSS)	469,365	1,360,407	(815,231)
OTHER INCOME
Allowance for equity funds used during construction	129,602	95,088	67,563
Investment Income, Net	63,864	288,197	145,127
Miscellaneous - net	(129,754)	(113,426)	(112,851)
TOTAL	63,712	269,859	99,839
INTEREST EXPENSE
Interest expense	768,322	707,212	700,545
Allowance for borrowed funds used during construction	(60,974)	(44,869)	(34,175)
TOTAL	707,348	662,343	666,370
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	(174,271)	967,923	(1,381,762)
Income Tax Expense (Benefit)	(1,036,826)	542,570	(817,259)
Noncontrolling Interest in Net Income (Loss) Preferred Unit Holders, Redeemable	13,894	13,741	19,115
Net Income (Loss) Available to Common Stockholders, Basic	$ 848,661	$ 411,612	$ (583,618)
Earnings (loss) per average common share:
Basic (in usd per share)	$ 4.68	$ 2.29	$ (3.26)
Diluted (in usd per share)	$ 4.63	$ 2.28	$ (3.26)
Basic average number of common shares outstanding	181,409,597	179,671,797	178,885,660
Diluted average number of common shares outstanding	183,378,513	180,535,893	178,885,660
Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	$ 9,384,111	$ 9,278,895	$ 8,866,659
Natural Gas, US Regulated [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	156,436	138,856	129,348
Competitive Businesses [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	1,468,905	1,656,730	1,849,638
Electricity, Purchased [Member]
Operation and Maintenance:
Cost of Goods and Services Sold	1,658,799	1,427,950	1,220,527
Entergy Arkansas [Member]
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	517,245	402,777	325,036
Nuclear refueling outage expenses	77,915	83,968	56,650
Operation and maintenance expense	724,831	694,157	693,181
Decommissioning	60,420	56,860	53,610
Taxes, Other	104,771	103,662	93,109
Other Depreciation and Amortization	292,649	277,146	264,215
Other regulatory charges (credits) - net	(14,807)	(16,074)	7,737
Costs and Expenses	2,015,414	1,833,148	1,726,888
OPERATING INCOME (LOSS)	45,229	306,771	359,720
OTHER INCOME
Allowance for equity funds used during construction	16,557	18,452	17,099
Investment Income, Net	25,406	35,882	19,087
Miscellaneous - net	(14,874)	(13,967)	(14,838)
TOTAL	27,089	40,367	21,348
INTEREST EXPENSE
Interest expense	124,459	122,075	115,311
Allowance for borrowed funds used during construction	(7,781)	(8,585)	(9,228)
TOTAL	116,678	113,490	106,083
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	(44,360)	233,648	274,985
Income Tax Expense (Benefit)	(297,067)	93,804	107,773
Noncontrolling Interest in Net Income (Loss) Preferred Unit Holders, Redeemable	1,249	1,428	5,270
Net Income (Loss) Available to Common Stockholders, Basic	251,458	138,416	161,942
Entergy Arkansas [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	2,060,643	2,139,919	2,086,608
Entergy Arkansas [Member] | Natural Gas, US Regulated [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	0
Entergy Arkansas [Member] | Electricity, Purchased [Member]
Operation and Maintenance:
Cost of Goods and Services Sold	252,390	230,652	233,350
Entergy Louisiana [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	4,296,320	4,300,550	4,177,048
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	915,410	912,060	804,433
Nuclear refueling outage expenses	51,626	52,074	51,361
Operation and maintenance expense	959,185	941,604	897,661
Decommissioning	53,736	49,457	46,944
Taxes, Other	183,745	175,359	165,665
Other Depreciation and Amortization	492,179	467,369	451,290
Other regulatory charges (credits) - net	4,396	(152,080)	44,131
Costs and Expenses	3,620,549	3,425,913	3,351,543
OPERATING INCOME (LOSS)	675,771	874,637	825,505
OTHER INCOME
Allowance for equity funds used during construction	79,922	51,485	27,925
Investment Income, Net	141,882	164,550	154,778
Miscellaneous - net	(27,530)	(39,756)	(37,715)
TOTAL	194,274	176,279	144,988
INTEREST EXPENSE
Interest expense	288,658	275,185	273,283
Allowance for borrowed funds used during construction	(39,616)	(25,914)	(14,571)
TOTAL	249,042	249,271	258,712
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	621,003	801,645	711,781
Income Tax Expense (Benefit)	(54,611)	485,298	89,734
Net Income (Loss) Available to Common Stockholders, Basic	675,614	316,347	622,047
Entergy Louisiana [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	4,232,541	4,246,020	4,126,343
Entergy Louisiana [Member] | Natural Gas, US Regulated [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	63,779	54,530	50,705
Entergy Louisiana [Member] | Electricity, Purchased [Member]
Operation and Maintenance:
Cost of Goods and Services Sold	960,272	980,070	890,058
Entergy Mississippi [Member]
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	260,198	185,816	95,090
Operation and maintenance expense	261,613	240,738	248,019
Taxes, Other	101,999	95,051	94,482
Other Depreciation and Amortization	152,577	143,479	136,214
Other regulatory charges (credits) - net	147,704	(19,134)	(3,721)
Costs and Expenses	1,288,666	974,413	867,986
OPERATING INCOME (LOSS)	46,446	223,816	226,663
OTHER INCOME
Allowance for equity funds used during construction	8,710	9,667	5,801
Investment Income, Net	135	85	656
Miscellaneous - net	(2,732)	(2,232)	(5,955)
TOTAL	6,113	7,520	502
INTEREST EXPENSE
Interest expense	55,905	51,260	57,114
Allowance for borrowed funds used during construction	(3,651)	(3,875)	(2,987)
TOTAL	52,254	47,385	54,127
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	305	183,951	173,038
Income Tax Expense (Benefit)	(125,773)	73,919	63,854
Noncontrolling Interest in Net Income (Loss) Preferred Unit Holders, Redeemable	834	953	2,443
Net Income (Loss) Available to Common Stockholders, Basic	125,244	109,079	106,741
Entergy Mississippi [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	1,335,112	1,198,229	1,094,649
Entergy Mississippi [Member] | Natural Gas, US Regulated [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	0
Entergy Mississippi [Member] | Electricity, Purchased [Member]
Operation and Maintenance:
Cost of Goods and Services Sold	364,575	328,463	297,902
Entergy New Orleans [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	717,390	716,070	665,463
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	114,787	111,082	40,489
Operation and maintenance expense	124,293	107,977	116,457
Taxes, Other	56,141	54,590	48,078
Other Depreciation and Amortization	55,930	52,945	51,737
Other regulatory charges (credits) - net	21,413	10,889	8,258
Costs and Expenses	643,198	619,661	564,570
OPERATING INCOME (LOSS)	74,192	96,409	100,893
OTHER INCOME
Allowance for equity funds used during construction	5,941	2,418	1,178
Investment Income, Net	604	707	256
Miscellaneous - net	(10,444)	(1,269)	(4,158)
TOTAL	(3,899)	1,856	(2,724)
INTEREST EXPENSE
Interest expense	21,772	21,281	21,061
Allowance for borrowed funds used during construction	(2,195)	(847)	(446)
TOTAL	19,577	20,434	20,615
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	50,716	77,831	77,554
Income Tax Expense (Benefit)	(2,436)	33,278	28,705
Noncontrolling Interest in Net Income (Loss) Preferred Unit Holders, Redeemable	0	841	965
Net Income (Loss) Available to Common Stockholders, Basic	53,152	43,712	47,884
Entergy New Orleans [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	624,733	631,744	586,820
Entergy New Orleans [Member] | Natural Gas, US Regulated [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	92,657	84,326	78,643
Entergy New Orleans [Member] | Electricity, Purchased [Member]
Operation and Maintenance:
Cost of Goods and Services Sold	270,634	282,178	299,551
Entergy Texas [Member]
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	204,830	225,517	271,968
Operation and maintenance expense	238,400	230,437	221,620
Taxes, Other	82,033	79,254	70,973
Other Depreciation and Amortization	128,534	117,520	107,026
Other regulatory charges (credits) - net	131,667	82,328	82,879
Costs and Expenses	1,399,476	1,345,335	1,371,063
OPERATING INCOME (LOSS)	206,426	199,558	244,556
OTHER INCOME
Allowance for equity funds used during construction	9,723	6,722	7,617
Investment Income, Net	2,188	981	987
Miscellaneous - net	(655)	14	308
TOTAL	11,256	7,717	8,912
INTEREST EXPENSE
Interest expense	87,203	86,719	87,776
Allowance for borrowed funds used during construction	(5,513)	(4,098)	(4,943)
TOTAL	81,690	82,621	82,833
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	135,992	124,654	170,635
Income Tax Expense (Benefit)	(26,243)	48,481	63,097
Net Income (Loss) Available to Common Stockholders, Basic	162,235	76,173	107,538
Entergy Texas [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	1,605,902	1,544,893	1,615,619
Entergy Texas [Member] | Natural Gas, US Regulated [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	0
Entergy Texas [Member] | Electricity, Purchased [Member]
Operation and Maintenance:
Cost of Goods and Services Sold	614,012	610,279	616,597
System Energy [Member]
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	64,778	71,700	27,416
Nuclear refueling outage expenses	20,715	17,968	19,512
Operation and maintenance expense	196,505	207,344	147,976
Decommissioning	34,336	43,347	50,797
Taxes, Other	28,090	26,180	25,195
Other Depreciation and Amortization	97,527	137,767	136,195
Other regulatory charges (credits) - net	(28,924)	(37,831)	(45,041)
Costs and Expenses	413,027	466,475	362,050
OPERATING INCOME (LOSS)	43,680	166,983	186,241
OTHER INCOME
Allowance for equity funds used during construction	8,750	6,345	7,944
Investment Income, Net	35,985	17,538	14,793
Miscellaneous - net	(5,775)	(6,711)	(5,644)
TOTAL	38,960	17,172	17,093
INTEREST EXPENSE
Interest expense	38,424	37,141	37,529
Allowance for borrowed funds used during construction	(2,218)	(1,551)	(2,000)
TOTAL	36,206	35,590	35,529
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	46,434	148,565	167,805
Income Tax Expense (Benefit)	(47,675)	69,969	71,061
Net Income (Loss) Available to Common Stockholders, Basic	94,109	78,596	96,744
System Energy [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	$ 456,707	$ 633,458	$ 548,291