Consolidated Statements Of Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	$ 2,844,838	$ 2,427,179
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	501,167	397,403
Nuclear refueling outage expenses	43,739	50,218
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	706,786	702,084
Asset Impairment Charges	3,273	5,095
Decommissioning	98,642	93,684
Taxes, Other	156,702	170,294
Other Depreciation and Amortization	414,519	399,710
Other regulatory charges (credits) - net	32,279	(7,679)
Costs and Expenses	2,336,841	2,027,423
OPERATING INCOME	507,997	399,756
OTHER INCOME (DEDUCTIONS)
Allowance for equity funds used during construction	14,577	35,953
Investment Income, Net	143,315	(216,853)
Miscellaneous - net	(60,929)	23,389
TOTAL	96,963	(157,511)
INTEREST EXPENSE
Interest Expense, Debt	205,886	205,589
Allowance for borrowed funds used during construction	(6,013)	(15,444)
TOTAL	199,873	190,145
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	405,087	52,100
Income taxes	65,942	(71,194)
Consolidated net income	339,145	123,294
Net Income (Loss) Attributable to Noncontrolling Interest, Preferred Unit Holders	$ 4,580	$ 4,580
Earnings per average common share:
Basic (in dollars per share)	$ 1.67	$ 0.59
Diluted (in dollars per share)	$ 1.66	$ 0.59
Basic average number of common shares outstanding (in shares)	200,525,549	199,790,016
Diluted average number of common shares outstanding (in shares)	201,059,665	200,901,349
Net Income (Loss) Available to Common Stockholders, Basic	$ 334,565	$ 118,714
Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	2,538,420	2,050,638
Natural Gas, US Regulated [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	58,168	43,976
Competitive Businesses [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	248,250	332,565
Electricity, Purchased [Member]
Operation and Maintenance:
Cost of Goods and Services Sold	379,734	216,614
Entergy Mississippi [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	336,619	293,922
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	60,197	63,297
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	67,831	62,337
Taxes, Other	25,899	27,190
Other Depreciation and Amortization	55,036	51,155
Other regulatory charges (credits) - net	8,129	(3,881)
Costs and Expenses	285,683	252,741
OPERATING INCOME	50,936	41,181
OTHER INCOME (DEDUCTIONS)
Allowance for equity funds used during construction	1,668	1,439
Investment Income, Net	42	120
Miscellaneous - net	(2,313)	(2,296)
TOTAL	(603)	(737)
INTEREST EXPENSE
Interest Expense, Debt	17,613	16,583
Allowance for borrowed funds used during construction	(677)	(551)
TOTAL	16,936	16,032
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	33,397	24,412
Income taxes	7,425	1,886
Consolidated net income	25,972	22,526
Entergy Mississippi [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	336,619	293,922
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	68,591	52,643
Entergy Arkansas [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	583,386	481,912
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	126,181	87,411
Nuclear refueling outage expenses	12,647	16,247
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	154,908	151,857
Decommissioning	19,000	17,941
Taxes, Other	29,743	31,060
Other Depreciation and Amortization	88,279	83,521
Other regulatory charges (credits) - net	(37,467)	(20,001)
Costs and Expenses	463,512	414,077
OPERATING INCOME	119,874	67,835
OTHER INCOME (DEDUCTIONS)
Allowance for equity funds used during construction	2,993	2,917
Investment Income, Net	27,887	7,938
Miscellaneous - net	(5,791)	(6,436)
TOTAL	25,089	4,419
INTEREST EXPENSE
Interest Expense, Debt	33,786	35,623
Allowance for borrowed funds used during construction	(1,290)	(1,281)
TOTAL	32,496	34,342
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	112,467	37,912
Income taxes	19,430	(6,683)
Consolidated net income	93,037	44,595
Entergy Arkansas [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	583,386	481,912
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	70,221	46,041
Entergy Louisiana [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	1,107,644	930,647
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	145,234	144,492
Nuclear refueling outage expenses	13,282	13,630
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	237,483	222,658
Decommissioning	16,823	16,001
Taxes, Other	52,484	50,077
Other Depreciation and Amortization	160,813	145,135
Other regulatory charges (credits) - net	31,097	11,132
Costs and Expenses	867,177	763,868
OPERATING INCOME	240,467	166,779
OTHER INCOME (DEDUCTIONS)
Allowance for equity funds used during construction	6,101	14,887
Investment Income, Net	72,515	(19,669)
Miscellaneous - net	(34,638)	49,601
TOTAL	43,978	44,819
INTEREST EXPENSE
Interest Expense, Debt	82,806	79,517
Allowance for borrowed funds used during construction	(2,759)	(7,132)
TOTAL	80,047	72,385
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	204,398	139,213
Income taxes	37,772	(50,183)
Consolidated net income	166,626	189,396
Earnings per average common share:
Net Income (Loss) Available to Common Stockholders, Basic	166,626	189,396
Entergy Louisiana [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	1,079,663	912,541
Entergy Louisiana [Member] | Natural Gas, US Regulated [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	27,981	18,106
Entergy Louisiana [Member] | Electricity, Purchased [Member]
Operation and Maintenance:
Cost of Goods and Services Sold	209,961	160,743
Entergy New Orleans [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	169,335	149,302
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	19,012	27,495
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	38,178	30,704
Taxes, Other	12,556	13,206
Other Depreciation and Amortization	18,161	15,075
Other regulatory charges (credits) - net	3,130	(5,736)
Costs and Expenses	159,707	137,211
OPERATING INCOME	9,628	12,091
OTHER INCOME (DEDUCTIONS)
Allowance for equity funds used during construction	258	2,485
Investment Income, Net	9	53
Miscellaneous - net	(302)	(738)
TOTAL	(35)	1,800
INTEREST EXPENSE
Interest Expense, Debt	7,029	6,640
Allowance for borrowed funds used during construction	(116)	(1,195)
TOTAL	6,913	5,445
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	2,680	8,446
Income taxes	909	(2,740)
Consolidated net income	1,771	11,186
Entergy New Orleans [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	139,148	123,431
Entergy New Orleans [Member] | Natural Gas, US Regulated [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	30,187	25,871
Entergy New Orleans [Member] | Electricity, Purchased [Member]
Operation and Maintenance:
Cost of Goods and Services Sold	68,670	56,467
Entergy Texas [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	480,220	339,336
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	112,396	41,346
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	62,955	58,933
Taxes, Other	21,875	19,272
Other Depreciation and Amortization	50,936	42,566
Other regulatory charges (credits) - net	15,840	21,368
Costs and Expenses	405,364	303,276
OPERATING INCOME	74,856	36,060
OTHER INCOME (DEDUCTIONS)
Allowance for equity funds used during construction	2,445	10,641
Investment Income, Net	224	429
Miscellaneous - net	(423)	(346)
TOTAL	2,246	10,724
INTEREST EXPENSE
Interest Expense, Debt	23,038	22,858
Allowance for borrowed funds used during construction	(984)	(4,573)
TOTAL	22,054	18,285
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	55,048	28,499
Income taxes	4,990	(4,208)
Consolidated net income	50,058	32,707
Net Income (Loss) Attributable to Noncontrolling Interest, Preferred Unit Holders	470	470
Earnings per average common share:
Net Income (Loss) Available to Common Stockholders, Basic	49,588	32,237
Entergy Texas [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	480,220	339,336
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	141,362	119,791
System Energy [Member]
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	16,859	13,143
Nuclear refueling outage expenses	6,718	8,272
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	41,960	40,471
Decommissioning	9,529	9,157
Taxes, Other	6,825	7,973
Other Depreciation and Amortization	28,194	26,899
Other regulatory charges (credits) - net	11,550	(10,560)
Costs and Expenses	121,635	95,355
OPERATING INCOME	(3,889)	35,309
OTHER INCOME (DEDUCTIONS)
Allowance for equity funds used during construction	1,111	3,584
Investment Income, Net	27,442	5,338
Miscellaneous - net	(2,024)	(2,460)
TOTAL	26,529	6,462
INTEREST EXPENSE
Interest Expense, Debt	9,535	8,540
Allowance for borrowed funds used during construction	(188)	(711)
TOTAL	9,347	7,829
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	13,293	33,942
Income taxes	(10,571)	5,429
Consolidated net income	23,864	28,513
Earnings per average common share:
Net Income (Loss) Available to Common Stockholders, Basic	23,864	28,513
System Energy [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	$ 117,746	$ 130,664