Consolidated Statements Of Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	$ 2,609,584	$ 2,723,881
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	478,330	443,296
Nuclear refueling outage expenses	50,441	42,760
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	783,051	783,585
Asset Impairment Charges	73,979	72,924
Decommissioning	102,119	94,400
Taxes, Other	158,575	165,218
Other Depreciation and Amortization	357,274	347,065
Other regulatory charges (credits) - net	(16,946)	42,946
Costs and Expenses	2,326,330	2,388,217
OPERATING INCOME	283,254	335,664
OTHER INCOME
Allowance for equity funds used during construction	38,216	28,343
Investment Income, Net	228,149	16,870
Miscellaneous - net	(64,658)	(31,356)
TOTAL	201,707	13,857
INTEREST EXPENSE
Interest expense	200,993	182,923
Allowance for borrowed funds used during construction	(17,449)	(13,265)
TOTAL	183,544	169,658
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	301,417	179,863
Income taxes	42,771	43,663
Net Income (Loss) Attributable to Noncontrolling Interest, Preferred Unit Holders	4,109	3,439
Net Income (Loss) Available to Common Stockholders, Basic	$ 254,537	$ 132,761
Earnings per average common share:
Basic (in dollars per share)	$ 1.34	$ 0.73
Diluted (in dollars per share)	$ 1.32	$ 0.73
Basic average number of common shares outstanding (in shares)	189,575,187	180,707,575
Diluted average number of common shares outstanding (in shares)	192,234,191	181,431,968
Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	$ 2,121,024	$ 2,248,262
Natural Gas, US Regulated [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	54,948	56,695
Competitive Businesses [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	433,612	418,924
Electricity, Purchased [Member]
Operation and Maintenance:
Cost of Goods and Services Sold	339,507	396,023
Entergy Arkansas [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	545,812	551,024
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	152,159	108,306
Nuclear refueling outage expenses	17,248	23,402
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	166,460	169,358
Decommissioning	15,761	14,760
Taxes, Other	28,363	27,905
Other Depreciation and Amortization	75,847	71,981
Other regulatory charges (credits) - net	445	(3,307)
Costs and Expenses	503,341	484,377
OPERATING INCOME	42,471	66,647
OTHER INCOME
Allowance for equity funds used during construction	3,428	4,008
Investment Income, Net	6,183	6,814
Miscellaneous - net	(3,690)	(3,871)
TOTAL	5,921	6,951
INTEREST EXPENSE
Interest expense	33,383	29,766
Allowance for borrowed funds used during construction	(1,414)	(1,890)
TOTAL	31,969	27,876
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	16,423	45,722
Income taxes	(22,698)	9,467
Net Income (Loss) Attributable to Noncontrolling Interest, Preferred Unit Holders	0	357
Net Income (Loss) Available to Common Stockholders, Basic	39,121	35,898
Entergy Arkansas [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	545,812	551,024
Entergy Arkansas [Member] | Natural Gas, US Regulated [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	0	0
Entergy Arkansas [Member] | Electricity, Purchased [Member]
Operation and Maintenance:
Cost of Goods and Services Sold	47,058	71,972
Entergy Louisiana [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	959,330	1,029,344
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	147,349	180,781
Nuclear refueling outage expenses	12,808	13,099
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	225,888	234,380
Decommissioning	13,879	12,772
Taxes, Other	49,682	51,280
Other Depreciation and Amortization	126,134	120,822
Other regulatory charges (credits) - net	(27,660)	23,119
Costs and Expenses	805,386	888,025
OPERATING INCOME	153,944	141,319
OTHER INCOME
Allowance for equity funds used during construction	23,914	17,745
Investment Income, Net	71,986	43,275
Miscellaneous - net	(42,344)	(7,665)
TOTAL	53,556	53,355
INTEREST EXPENSE
Interest expense	74,703	70,096
Allowance for borrowed funds used during construction	(11,367)	(8,763)
TOTAL	63,336	61,333
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	144,164	133,341
Income taxes	16,531	21,748
Net Income (Loss) Available to Common Stockholders, Basic	127,633	111,593
Entergy Louisiana [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	936,693	1,005,106
Entergy Louisiana [Member] | Natural Gas, US Regulated [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	22,637	24,238
Entergy Louisiana [Member] | Electricity, Purchased [Member]
Operation and Maintenance:
Cost of Goods and Services Sold	257,306	251,772
Entergy Mississippi [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	282,244	315,743
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	53,229	63,528
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	59,183	59,458
Taxes, Other	26,127	25,394
Other Depreciation and Amortization	39,088	38,182
Other regulatory charges (credits) - net	2,370	293
Costs and Expenses	251,452	274,311
OPERATING INCOME	30,792	41,432
OTHER INCOME
Allowance for equity funds used during construction	1,913	1,978
Investment Income, Net	152	25
Miscellaneous - net	(263)	(571)
TOTAL	1,802	1,432
INTEREST EXPENSE
Interest expense	14,540	13,905
Allowance for borrowed funds used during construction	(785)	(828)
TOTAL	13,755	13,077
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	18,839	29,787
Income taxes	3,441	6,944
Net Income (Loss) Attributable to Noncontrolling Interest, Preferred Unit Holders	0	238
Net Income (Loss) Available to Common Stockholders, Basic	15,398	22,605
Entergy Mississippi [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	282,244	315,743
Entergy Mississippi [Member] | Natural Gas, US Regulated [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	0	0
Entergy Mississippi [Member] | Electricity, Purchased [Member]
Operation and Maintenance:
Cost of Goods and Services Sold	71,455	87,456
Entergy New Orleans [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	163,194	188,275
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	30,760	23,739
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	30,298	28,299
Taxes, Other	13,542	15,132
Other Depreciation and Amortization	14,164	13,747
Other regulatory charges (credits) - net	(2,355)	6,333
Costs and Expenses	147,058	170,406
OPERATING INCOME	16,136	17,869
OTHER INCOME
Allowance for equity funds used during construction	2,290	851
Investment Income, Net	179	93
Miscellaneous - net	(1,506)	(337)
TOTAL	963	607
INTEREST EXPENSE
Interest expense	5,936	5,279
Allowance for borrowed funds used during construction	(914)	(314)
TOTAL	5,022	4,965
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	12,077	13,511
Income taxes	3,054	2,629
Entergy New Orleans [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	130,883	155,818
Entergy New Orleans [Member] | Natural Gas, US Regulated [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	32,311	32,457
Entergy New Orleans [Member] | Electricity, Purchased [Member]
Operation and Maintenance:
Cost of Goods and Services Sold	60,649	83,156
Entergy Texas [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	340,474	348,940
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	48,103	18,706
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	59,626	52,674
Taxes, Other	18,640	20,403
Other Depreciation and Amortization	37,037	30,766
Other regulatory charges (credits) - net	19,459	25,617
Costs and Expenses	323,733	307,858
OPERATING INCOME	16,741	41,082
OTHER INCOME
Allowance for equity funds used during construction	5,081	1,661
Investment Income, Net	1,682	555
Miscellaneous - net	(363)	113
TOTAL	6,400	2,329
INTEREST EXPENSE
Interest expense	22,460	22,051
Allowance for borrowed funds used during construction	(2,580)	(938)
TOTAL	19,880	21,113
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	3,261	22,298
Income taxes	(18,081)	4,948
Net Income (Loss) Available to Common Stockholders, Basic	21,342	17,350
Entergy Texas [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	340,474	348,940
Entergy Texas [Member] | Natural Gas, US Regulated [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	0	0
Entergy Texas [Member] | Electricity, Purchased [Member]
Operation and Maintenance:
Cost of Goods and Services Sold	140,868	159,692
System Energy [Member]
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	21,561	28,425
Nuclear refueling outage expenses	8,186	3,972
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	45,282	45,339
Decommissioning	8,799	8,457
Taxes, Other	7,539	7,097
Other Depreciation and Amortization	26,574	33,321
Other regulatory charges (credits) - net	(9,205)	(9,109)
Costs and Expenses	108,736	117,502
OPERATING INCOME	31,368	30,941
OTHER INCOME
Allowance for equity funds used during construction	1,589	2,100
Investment Income, Net	6,991	6,886
Miscellaneous - net	(1,228)	(1,176)
TOTAL	7,352	7,810
INTEREST EXPENSE
Interest expense	9,397	9,325
Allowance for borrowed funds used during construction	(389)	(532)
TOTAL	9,008	8,793
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	29,712	29,958
Income taxes	6,134	7,650
Net Income (Loss) Available to Common Stockholders, Basic	23,578	22,308
System Energy [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	$ 140,104	$ 148,443