Consolidated Statements Of Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	$ 2,427,179	$ 2,609,584
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	397,403	478,330
Nuclear refueling outage expenses	50,218	50,441
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	702,084	783,051
Asset Impairment Charges	5,095	73,979
Decommissioning	93,684	102,119
Taxes, Other	170,294	158,575
Other Depreciation and Amortization	399,710	357,274
Other regulatory charges (credits) - net	(7,679)	(16,946)
Costs and Expenses	2,027,423	2,326,330
OPERATING INCOME	399,756	283,254
OTHER INCOME (DEDUCTIONS)
Allowance for equity funds used during construction	35,953	38,216
Investment Income, Net	(216,853)	228,149
Miscellaneous - net	23,389	(64,658)
TOTAL	(157,511)	201,707
INTEREST EXPENSE
Interest expense	205,589	200,993
Allowance for borrowed funds used during construction	(15,444)	(17,449)
TOTAL	190,145	183,544
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	52,100	301,417
Income taxes	(71,194)	42,771
Consolidated net income	123,294	258,646
Net Income (Loss) Attributable to Noncontrolling Interest, Preferred Unit Holders	$ 4,580	$ 4,109
Earnings per average common share:
Basic (in dollars per share)	$ 0.59	$ 1.34
Diluted (in dollars per share)	$ 0.59	$ 1.32
Basic average number of common shares outstanding (in shares)	199,790,016	189,575,187
Diluted average number of common shares outstanding (in shares)	200,901,349	192,234,191
Net Income (Loss) Available to Common Stockholders, Basic	$ 118,714	$ 254,537
Increase (Decrease) in Income Taxes	26,000
Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	2,050,638	2,121,024
Natural Gas, US Regulated [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	43,976	54,948
Competitive Businesses [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	332,565	433,612
Electricity, Purchased [Member]
Operation and Maintenance:
Cost of Goods and Services Sold	216,614	339,507
Entergy Mississippi [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	293,922	282,244
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	63,297	53,229
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	62,337	59,183
Taxes, Other	27,190	26,127
Other Depreciation and Amortization	51,155	39,088
Other regulatory charges (credits) - net	(3,881)	2,370
Costs and Expenses	252,741	251,452
OPERATING INCOME	41,181	30,792
OTHER INCOME (DEDUCTIONS)
Allowance for equity funds used during construction	1,439	1,913
Investment Income, Net	120	152
Miscellaneous - net	(2,296)	(263)
TOTAL	(737)	1,802
INTEREST EXPENSE
Interest expense	16,583	14,540
Allowance for borrowed funds used during construction	(551)	(785)
TOTAL	16,032	13,755
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	24,412	18,839
Income taxes	1,886	3,441
Consolidated net income	22,526	15,398
Entergy Mississippi [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	293,922	282,244
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	52,643	71,455
Entergy Arkansas [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	481,912	545,812
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	87,411	152,159
Nuclear refueling outage expenses	16,247	17,248
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	151,857	166,460
Decommissioning	17,941	15,761
Taxes, Other	31,060	28,363
Other Depreciation and Amortization	83,521	75,847
Other regulatory charges (credits) - net	(20,001)	445
Costs and Expenses	414,077	503,341
OPERATING INCOME	67,835	42,471
OTHER INCOME (DEDUCTIONS)
Allowance for equity funds used during construction	2,917	3,428
Investment Income, Net	7,938	6,183
Miscellaneous - net	(6,436)	(3,690)
TOTAL	4,419	5,921
INTEREST EXPENSE
Interest expense	35,623	33,383
Allowance for borrowed funds used during construction	(1,281)	(1,414)
TOTAL	34,342	31,969
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	37,912	16,423
Income taxes	(6,683)	(22,698)
Consolidated net income	44,595	39,121
Entergy Arkansas [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	481,912	545,812
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	46,041	47,058
Entergy Louisiana [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	930,647	959,330
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	144,492	147,349
Nuclear refueling outage expenses	13,630	12,808
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	222,658	225,888
Decommissioning	16,001	13,879
Taxes, Other	50,077	49,682
Other Depreciation and Amortization	145,135	126,134
Other regulatory charges (credits) - net	11,132	(27,660)
Costs and Expenses	763,868	805,386
OPERATING INCOME	166,779	153,944
OTHER INCOME (DEDUCTIONS)
Allowance for equity funds used during construction	14,887	23,914
Investment Income, Net	(19,669)	71,986
Miscellaneous - net	49,601	(42,344)
TOTAL	44,819	53,556
INTEREST EXPENSE
Interest expense	79,517	74,703
Allowance for borrowed funds used during construction	(7,132)	(11,367)
TOTAL	72,385	63,336
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	139,213	144,164
Income taxes	(50,183)	16,531
Consolidated net income	189,396	127,633
Earnings per average common share:
Net Income (Loss) Available to Common Stockholders, Basic	189,396	127,633
Entergy Louisiana [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	912,541	936,693
Entergy Louisiana [Member] | Natural Gas, US Regulated [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	18,106	22,637
Entergy Louisiana [Member] | Electricity, Purchased [Member]
Operation and Maintenance:
Cost of Goods and Services Sold	160,743	257,306
Entergy New Orleans [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	149,302	163,194
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	27,495	30,760
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	30,704	30,298
Taxes, Other	13,206	13,542
Other Depreciation and Amortization	15,075	14,164
Other regulatory charges (credits) - net	(5,736)	(2,355)
Costs and Expenses	137,211	147,058
OPERATING INCOME	12,091	16,136
OTHER INCOME (DEDUCTIONS)
Allowance for equity funds used during construction	2,485	2,290
Investment Income, Net	53	179
Miscellaneous - net	(738)	(1,506)
TOTAL	1,800	963
INTEREST EXPENSE
Interest expense	6,640	5,936
Allowance for borrowed funds used during construction	(1,195)	(914)
TOTAL	5,445	5,022
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	8,446	12,077
Income taxes	(2,740)	3,054
Consolidated net income	11,186	9,023
Entergy New Orleans [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	123,431	130,883
Entergy New Orleans [Member] | Natural Gas, US Regulated [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	25,871	32,311
Entergy New Orleans [Member] | Electricity, Purchased [Member]
Operation and Maintenance:
Cost of Goods and Services Sold	56,467	60,649
Entergy Texas [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	339,336	340,474
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	41,346	48,103
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	58,933	59,626
Taxes, Other	19,272	18,640
Other Depreciation and Amortization	42,566	37,037
Other regulatory charges (credits) - net	21,368	19,459
Costs and Expenses	303,276	323,733
OPERATING INCOME	36,060	16,741
OTHER INCOME (DEDUCTIONS)
Allowance for equity funds used during construction	10,641	5,081
Investment Income, Net	429	1,682
Miscellaneous - net	(346)	(363)
TOTAL	10,724	6,400
INTEREST EXPENSE
Interest expense	22,858	22,460
Allowance for borrowed funds used during construction	(4,573)	(2,580)
TOTAL	18,285	19,880
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	28,499	3,261
Income taxes	(4,208)	(18,081)
Consolidated net income	32,707	21,342
Net Income (Loss) Attributable to Noncontrolling Interest, Preferred Unit Holders	470	0
Earnings per average common share:
Net Income (Loss) Available to Common Stockholders, Basic	32,237	21,342
Entergy Texas [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	339,336	340,474
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	119,791	140,868
System Energy [Member]
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	13,143	21,561
Nuclear refueling outage expenses	8,272	8,186
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	40,471	45,282
Decommissioning	9,157	8,799
Taxes, Other	7,973	7,539
Other Depreciation and Amortization	26,899	26,574
Other regulatory charges (credits) - net	(10,560)	(9,205)
Costs and Expenses	95,355	108,736
OPERATING INCOME	35,309	31,368
OTHER INCOME (DEDUCTIONS)
Allowance for equity funds used during construction	3,584	1,589
Investment Income, Net	5,338	6,991
Miscellaneous - net	(2,460)	(1,228)
TOTAL	6,462	7,352
INTEREST EXPENSE
Interest expense	8,540	9,397
Allowance for borrowed funds used during construction	(711)	(389)
TOTAL	7,829	9,008
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	33,942	29,712
Income taxes	5,429	6,134
Consolidated net income	28,513	23,578
Earnings per average common share:
Net Income (Loss) Available to Common Stockholders, Basic	28,513	23,578
System Energy [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	$ 130,664	$ 140,104