Consolidated Statements Of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	$ 3,140,575	$ 3,104,319	$ 8,416,367	$ 8,496,970
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	596,939	729,269	1,542,592	1,638,367
Nuclear refueling outage expenses	52,044	37,937	153,447	116,057
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	805,696	854,013	2,430,617	2,477,699
Asset Impairment Charges	198,086	155,215	288,483	297,082
Decommissioning	101,811	93,829	308,557	285,834
Taxes, Other	165,731	161,916	487,715	485,682
Other Depreciation and Amortization	379,219	324,628	1,099,990	1,022,099
Other regulatory charges (credits) - net	4,781	37,097	(38,698)	223,416
Costs and Expenses	2,620,646	2,833,284	7,274,410	7,798,673
OPERATING INCOME	519,929	271,035	1,141,957	698,297
OTHER INCOME
Allowance for equity funds used during construction	33,161	32,354	108,546	92,367
Investment Income, Net	82,295	177,081	406,663	265,086
Miscellaneous - net	(50,086)	(43,591)	(160,614)	(123,439)
TOTAL	65,370	165,844	354,595	234,014
INTEREST EXPENSE
Interest expense	201,412	195,311	603,517	570,548
Allowance for borrowed funds used during construction	(14,773)	(15,244)	(49,034)	(43,177)
TOTAL	186,639	180,067	554,483	527,371
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	398,660	256,812	942,069	404,940
Income taxes	29,201	(283,006)	73,430	(519,937)
Consolidated net income	369,459	539,818	868,639	924,877
Net Income (Loss) Attributable to Noncontrolling Interest, Preferred Unit Holders	$ 4,219	$ 3,439	$ 12,438	$ 10,317
Earnings per average common share:
Basic (in dollars per share)	$ 1.84	$ 2.96	$ 4.42	$ 5.06
Diluted (in dollars per share)	$ 1.82	$ 2.92	$ 4.38	$ 5.01
Basic average number of common shares outstanding (in shares)	198,932,387	181,002,303	193,876,557	180,845,440
Diluted average number of common shares outstanding (in shares)	200,492,935	183,664,583	195,685,851	182,692,325
Net Income (Loss) Available to Common Stockholders, Basic	$ 365,240	$ 536,379	$ 856,201	$ 914,560
Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	2,812,934	2,697,887	7,279,683	7,276,374
Natural Gas, US Regulated [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	27,269	26,352	112,916	112,990
Competitive Businesses [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	300,372	380,080	1,023,768	1,107,606
Electricity, Purchased [Member]
Operation and Maintenance:
Cost of Goods and Services Sold	316,339	439,380	1,001,707	1,252,437
Entergy Mississippi [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	398,732	367,734	983,713	1,037,166
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	87,386	78,533	188,006	207,724
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	69,253	69,936	195,357	193,979
Taxes, Other	26,673	26,024	78,613	75,212
Other Depreciation and Amortization	44,339	37,752	123,145	114,293
Other regulatory charges (credits) - net	5,771	5,487	11,708	133,715
Costs and Expenses	311,708	322,519	820,290	1,014,320
OPERATING INCOME	87,024	45,215	163,423	22,846
OTHER INCOME
Allowance for equity funds used during construction	2,079	2,251	6,341	6,351
Investment Income, Net	462	1	1,011	26
Miscellaneous - net	(1,648)	116	(2,238)	(1,866)
TOTAL	893	2,368	5,114	4,511
INTEREST EXPENSE
Interest expense	15,922	13,950	45,804	41,916
Allowance for borrowed funds used during construction	(892)	(944)	(2,683)	(2,662)
TOTAL	15,030	13,006	43,121	39,254
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	72,887	34,577	125,416	(11,897)
Income taxes	16,650	(16,156)	27,114	(123,715)
Consolidated net income	56,237	50,733	98,302	111,818
Net Income (Loss) Attributable to Noncontrolling Interest, Preferred Unit Holders	0	238	0	715
Earnings per average common share:
Net Income (Loss) Available to Common Stockholders, Basic	56,237	50,495	98,302	111,103
Entergy Mississippi [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	398,732	367,734	983,713	1,037,166
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	78,286	104,787	223,461	289,397
Entergy Arkansas [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	687,526	568,399	1,776,267	1,614,028
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	109,779	164,438	370,534	379,240
Nuclear refueling outage expenses	17,381	19,062	51,823	61,623
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	188,299	188,882	542,765	536,032
Decommissioning	17,422	15,226	50,351	44,971
Taxes, Other	31,783	27,972	87,327	80,322
Other Depreciation and Amortization	78,594	73,579	231,502	218,261
Other regulatory charges (credits) - net	1,018	(13,758)	(8,873)	(29,378)
Costs and Expenses	505,350	533,614	1,481,846	1,486,095
OPERATING INCOME	182,176	34,785	294,421	127,933
OTHER INCOME
Allowance for equity funds used during construction	3,977	3,735	10,777	12,214
Investment Income, Net	8,788	12,060	19,193	21,352
Miscellaneous - net	(4,286)	(3,063)	(12,704)	(10,815)
TOTAL	8,479	12,732	17,266	22,751
INTEREST EXPENSE
Interest expense	35,454	31,632	104,664	92,315
Allowance for borrowed funds used during construction	(1,641)	(1,739)	(4,384)	(5,737)
TOTAL	33,813	29,893	100,280	86,578
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	156,842	17,624	211,407	64,106
Income taxes	7,126	(111,266)	(27,729)	(183,595)
Consolidated net income	149,716	128,890	239,136	247,701
Net Income (Loss) Attributable to Noncontrolling Interest, Preferred Unit Holders	0	357	0	1,071
Earnings per average common share:
Net Income (Loss) Available to Common Stockholders, Basic	149,716	128,533	239,136	246,630
Entergy Arkansas [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	687,526	568,399	1,776,267	1,614,028
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	61,074	58,213	156,417	195,024
Entergy Louisiana [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	1,231,677	1,206,612	3,297,324	3,308,744
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	259,419	318,987	627,240	700,296
Nuclear refueling outage expenses	14,026	12,969	40,225	38,739
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	249,773	239,230	726,496	724,604
Decommissioning	15,606	13,654	43,544	39,906
Taxes, Other	49,602	44,594	145,942	143,021
Other Depreciation and Amortization	137,891	124,030	394,271	366,950
Other regulatory charges (credits) - net	(29,224)	(1,433)	(90,762)	30,781
Costs and Expenses	894,923	970,094	2,565,106	2,780,746
OPERATING INCOME	336,754	236,518	732,218	527,998
OTHER INCOME
Allowance for equity funds used during construction	14,609	20,423	59,194	57,292
Investment Income, Net	45,237	53,009	166,721	143,137
Miscellaneous - net	(15,067)	(25,782)	(79,717)	(56,217)
TOTAL	44,779	47,650	146,198	144,212
INTEREST EXPENSE
Interest expense	78,350	73,084	230,684	216,762
Allowance for borrowed funds used during construction	(7,041)	(10,168)	(28,145)	(28,382)
TOTAL	71,309	62,916	202,539	188,380
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	310,224	221,252	675,877	483,830
Income taxes	54,964	2,944	109,900	(30,430)
Consolidated net income	255,260	218,308	565,977	514,260
Earnings per average common share:
Net Income (Loss) Available to Common Stockholders, Basic	255,260	218,308	565,977	514,260
Entergy Louisiana [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	1,221,874	1,196,278	3,252,826	3,263,073
Entergy Louisiana [Member] | Natural Gas, US Regulated [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	9,803	10,334	44,498	45,671
Entergy Louisiana [Member] | Electricity, Purchased [Member]
Operation and Maintenance:
Cost of Goods and Services Sold	197,830	218,063	678,150	736,449
Entergy New Orleans [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	194,204	200,182	533,191	566,903
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	27,013	54,754	84,963	93,859
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	32,755	30,593	95,305	87,312
Taxes, Other	15,142	15,551	41,819	43,534
Other Depreciation and Amortization	14,756	14,059	43,146	41,756
Other regulatory charges (credits) - net	7,571	5,853	9,716	18,313
Costs and Expenses	165,328	178,638	470,670	499,547
OPERATING INCOME	28,876	21,544	62,521	67,356
OTHER INCOME
Allowance for equity funds used during construction	2,793	1,694	7,769	3,762
Investment Income, Net	109	30	352	330
Miscellaneous - net	(1,019)	(660)	(3,467)	(2,401)
TOTAL	1,883	1,064	4,654	1,691
INTEREST EXPENSE
Interest expense	6,046	5,388	18,001	15,936
Allowance for borrowed funds used during construction	(1,115)	(626)	(3,102)	(1,390)
TOTAL	4,931	4,762	14,899	14,546
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	25,828	17,846	52,276	54,501
Income taxes	920	(3,561)	5,342	3,943
Consolidated net income	24,908	21,407	46,934	50,558
Entergy New Orleans [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	176,738	184,164	464,773	499,584
Entergy New Orleans [Member] | Natural Gas, US Regulated [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	17,466	16,018	68,418	67,319
Entergy New Orleans [Member] | Electricity, Purchased [Member]
Operation and Maintenance:
Cost of Goods and Services Sold	68,091	57,828	195,721	214,773
Entergy Texas [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	442,877	477,231	1,146,931	1,229,657
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	64,211	79,130	129,285	154,925
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	69,937	58,795	190,989	171,317
Taxes, Other	20,870	20,752	60,773	61,461
Other Depreciation and Amortization	38,722	31,365	113,071	93,272
Other regulatory charges (credits) - net	27,662	33,550	66,574	85,064
Costs and Expenses	373,367	377,265	1,024,658	1,029,972
OPERATING INCOME	69,510	99,966	122,273	199,685
OTHER INCOME
Allowance for equity funds used during construction	7,454	2,222	18,948	5,716
Investment Income, Net	486	601	2,542	1,698
Miscellaneous - net	115	468	980	(154)
TOTAL	8,055	3,291	22,470	7,260
INTEREST EXPENSE
Interest expense	21,379	21,760	63,992	65,646
Allowance for borrowed funds used during construction	(3,534)	(1,253)	(9,370)	(3,224)
TOTAL	17,845	20,507	54,622	62,422
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	59,720	82,750	90,121	144,523
Income taxes	(13,504)	16,904	(43,381)	30,538
Consolidated net income	73,224	65,846	133,502	113,985
Net Income (Loss) Attributable to Noncontrolling Interest, Preferred Unit Holders	110	0	110	0
Earnings per average common share:
Net Income (Loss) Available to Common Stockholders, Basic	73,114	65,846	133,392	113,985
Entergy Texas [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	442,877	477,231	1,146,931	1,229,657
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	151,965	153,673	463,966	463,933
System Energy [Member]
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	23,748	14,484	66,335	44,939
Nuclear refueling outage expenses	8,412	5,906	25,013	12,698
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	49,533	48,969	147,283	143,003
Decommissioning	8,976	8,626	26,663	25,624
Taxes, Other	7,120	7,106	21,835	21,069
Other Depreciation and Amortization	26,613	4,355	79,761	71,143
Other regulatory charges (credits) - net	(8,016)	7,398	(27,059)	(15,080)
Costs and Expenses	116,386	96,844	339,831	303,396
OPERATING INCOME	29,086	(17,879)	84,754	36,468
OTHER INCOME
Allowance for equity funds used during construction	2,251	2,028	5,518	7,032
Investment Income, Net	8,215	23,738	21,577	33,567
Miscellaneous - net	(1,300)	(1,421)	(4,018)	(4,391)
TOTAL	9,166	24,345	23,077	36,208
INTEREST EXPENSE
Interest expense	8,546	9,753	26,467	28,734
Allowance for borrowed funds used during construction	(551)	(515)	(1,350)	(1,783)
TOTAL	7,995	9,238	25,117	26,951
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	30,257	(2,772)	82,714	45,725
Income taxes	5,226	(25,744)	9,633	(22,942)
Consolidated net income	25,031	22,972	73,081	68,667
Earnings per average common share:
Net Income (Loss) Available to Common Stockholders, Basic	25,031	22,972	73,081	68,667
System Energy [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	$ 145,472	$ 78,965	$ 424,585	$ 339,864