Consolidated Statements Of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	$ 3,104,319	$ 3,243,628	$ 8,496,970	$ 8,450,636
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	729,269	612,950	1,638,367	1,426,462
Nuclear refueling outage expenses	37,937	43,273	116,057	124,126
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	854,013	775,001	2,477,699	2,416,825
Asset Impairment Charges	155,215	16,221	297,082	421,584
Asset Write-Offs, Impairments, And Related Charges	155,000	16,000	297,000	422,000
Decommissioning	93,829	95,392	285,834	310,062
Taxes, Other	161,916	159,474	485,682	469,090
Other Depreciation and Amortization	324,628	354,739	1,022,099	1,052,332
Other regulatory charges (credits) - net	37,097	19,435	223,416	(59,314)
Costs and Expenses	2,833,284	2,484,625	7,798,673	7,343,571
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property	0	0	0	(16,270)
OPERATING INCOME	271,035	759,003	698,297	1,123,335
OTHER INCOME
Allowance for equity funds used during construction	32,354	24,338	92,367	65,722
Investment Income, Net	177,081	58,332	265,086	194,978
Miscellaneous - net	(43,591)	(31,335)	(123,439)	(78,726)
TOTAL	165,844	51,335	234,014	181,974
INTEREST EXPENSE
Interest expense	195,311	178,391	570,548	522,857
Allowance for borrowed funds used during construction	(15,244)	(11,492)	(43,177)	(31,057)
TOTAL	180,067	166,899	527,371	491,800
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	256,812	643,439	404,940	813,509
Income taxes	(283,006)	241,795	(519,937)	(87,555)
Net Income (Loss) Attributable to Noncontrolling Interest, Preferred Unit Holders	3,439	3,446	10,317	10,338
Net Income (Loss) Available to Common Stockholders, Basic	$ 536,379	$ 398,198	$ 914,560	$ 890,726
Earnings per average common share:
Basic (in dollars per share)	$ 2.96	$ 2.22	$ 5.06	$ 4.96
Diluted (in dollars per share)	2.92	2.21	5.01	4.94
Dividends declared per common share (in dollars per share)	$ 0.89	$ 0.87	$ 2.67	$ 2.61
Basic average number of common shares outstanding (in shares)	181,002,303	179,563,819	180,845,440	179,458,914
Diluted average number of common shares outstanding (in shares)	183,664,583	180,464,069	182,692,325	180,163,074
Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	$ 2,697,887	$ 2,793,798	$ 7,276,374	$ 7,056,758
Natural Gas, US Regulated [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	26,352	26,585	112,990	100,011
Competitive Businesses [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	380,080	423,245	1,107,606	1,293,867
Electricity, Purchased [Member]
Operation and Maintenance:
Cost of Goods and Services Sold	439,380	408,140	1,252,437	1,182,404
Entergy Arkansas [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	568,399		1,614,028
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	164,438	133,254	379,240	283,354
Nuclear refueling outage expenses	19,062	22,988	61,623	59,942
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	188,882	171,498	536,032	502,696
Decommissioning	15,226	14,320	44,971	42,321
Taxes, Other	27,972	29,259	80,322	78,438
Other Depreciation and Amortization	73,579	70,433	218,261	206,586
Other regulatory charges (credits) - net	(13,758)	(5,219)	(29,378)	(10,797)
Costs and Expenses	533,614	499,956	1,486,095	1,355,648
OPERATING INCOME	34,785	173,270	127,933	288,591
OTHER INCOME
Allowance for equity funds used during construction	3,735	4,140	12,214	13,922
Investment Income, Net	12,060	6,738	21,352	27,865
Miscellaneous - net	(3,063)	(3,332)	(10,815)	(9,976)
TOTAL	12,732	7,546	22,751	31,811
INTEREST EXPENSE
Interest expense	31,632	31,010	92,315	86,776
Allowance for borrowed funds used during construction	(1,739)	(1,944)	(5,737)	(6,458)
TOTAL	29,893	29,066	86,578	80,318
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	17,624	151,750	64,106	240,084
Income taxes	(111,266)	59,112	(183,595)	94,592
Net Income (Loss) Attributable to Noncontrolling Interest, Preferred Unit Holders	357	357	1,071	1,071
Net Income (Loss) Available to Common Stockholders, Basic	128,533	92,281	246,630	144,421
Entergy Arkansas [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	568,399	673,226	1,614,028	1,644,239
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	58,213	63,423	195,024	193,108
Entergy Louisiana [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	1,206,612	1,290,494	3,308,744	3,254,711
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	318,987	301,584	700,296	635,684
Nuclear refueling outage expenses	12,969	13,616	38,739	38,565
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	239,230	229,664	724,604	683,754
Decommissioning	13,654	12,444	39,906	36,850
Taxes, Other	44,594	45,059	143,021	135,418
Other Depreciation and Amortization	124,030	117,923	366,950	349,660
Other regulatory charges (credits) - net	(1,433)	(1,795)	30,781	(78,503)
Costs and Expenses	970,094	991,820	2,780,746	2,597,253
OPERATING INCOME	236,518	298,674	527,998	657,458
OTHER INCOME
Allowance for equity funds used during construction	20,423	13,393	57,292	34,492
Investment Income, Net	53,009	42,662	143,137	124,411
Miscellaneous - net	(25,782)	(11,542)	(56,217)	(29,573)
TOTAL	47,650	44,513	144,212	129,330
INTEREST EXPENSE
Interest expense	73,084	69,518	216,762	205,316
Allowance for borrowed funds used during construction	(10,168)	(6,713)	(28,382)	(17,428)
TOTAL	62,916	62,805	188,380	187,888
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	221,252	280,382	483,830	598,900
Income taxes	2,944	94,098	(30,430)	193,759
Net Income (Loss) Available to Common Stockholders, Basic	218,308	186,284	514,260	405,141
Entergy Louisiana [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	1,196,278	1,280,475	3,263,073	3,216,677
Entergy Louisiana [Member] | Natural Gas, US Regulated [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	10,334	10,019	45,671	38,034
Entergy Louisiana [Member] | Electricity, Purchased [Member]
Operation and Maintenance:
Cost of Goods and Services Sold	218,063	273,325	736,449	795,825
Entergy Mississippi [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	367,734		1,037,166
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	78,533	61,681	207,724	146,869
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	69,936	56,713	193,979	170,337
Taxes, Other	26,024	23,568	75,212	71,518
Other Depreciation and Amortization	37,752	36,176	114,293	106,935
Other regulatory charges (credits) - net	5,487	(3,840)	133,715	(13,983)
Costs and Expenses	322,519	264,384	1,014,320	718,085
OPERATING INCOME	45,215	84,813	22,846	180,767
OTHER INCOME
Allowance for equity funds used during construction	2,251	2,566	6,351	6,741
Investment Income, Net	1	0	26	33
Miscellaneous - net	116	(832)	(1,866)	(2,894)
TOTAL	2,368	1,734	4,511	3,880
INTEREST EXPENSE
Interest expense	13,950	12,713	41,916	37,953
Allowance for borrowed funds used during construction	(944)	(1,048)	(2,662)	(2,681)
TOTAL	13,006	11,665	39,254	35,272
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	34,577	74,882	(11,897)	149,375
Income taxes	(16,156)	28,337	(123,715)	57,369
Net Income (Loss) Attributable to Noncontrolling Interest, Preferred Unit Holders	238	238	715	715
Net Income (Loss) Available to Common Stockholders, Basic	50,495	46,307	111,103	91,291
Entergy Mississippi [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	367,734	349,197	1,037,166	898,852
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	104,787	90,086	289,397	236,409
Entergy New Orleans [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	200,182	199,017	566,903	544,228
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	54,754	26,082	93,859	79,118
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	30,593	26,092	87,312	73,462
Taxes, Other	15,551	15,135	43,534	41,397
Other Depreciation and Amortization	14,059	13,286	41,756	39,356
Other regulatory charges (credits) - net	5,853	5,514	18,313	6,717
Costs and Expenses	178,638	165,246	499,547	460,651
OPERATING INCOME	21,544	33,771	67,356	83,577
OTHER INCOME
Allowance for equity funds used during construction	1,694	654	3,762	1,656
Investment Income, Net	30	222	330	521
Miscellaneous - net	(660)	(317)	(2,401)	(617)
TOTAL	1,064	559	1,691	1,560
INTEREST EXPENSE
Interest expense	5,388	5,313	15,936	16,012
Allowance for borrowed funds used during construction	(626)	(229)	(1,390)	(580)
TOTAL	4,762	5,084	14,546	15,432
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	17,846	29,246	54,501	69,705
Income taxes	(3,561)	10,717	3,943	25,316
Net Income (Loss) Attributable to Noncontrolling Interest, Preferred Unit Holders	0	241	0	724
Net Income (Loss) Available to Common Stockholders, Basic	21,407	18,288	50,558	43,665
Entergy New Orleans [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	184,164	182,451	499,584	482,251
Entergy New Orleans [Member] | Natural Gas, US Regulated [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	16,018	16,566	67,319	61,977
Entergy New Orleans [Member] | Electricity, Purchased [Member]
Operation and Maintenance:
Cost of Goods and Services Sold	57,828	79,137	214,773	220,601
Entergy Texas [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	477,231		1,229,657
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	79,130	60,292	154,925	164,447
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	58,795	51,874	171,317	162,594
Taxes, Other	20,752	20,811	61,461	59,506
Other Depreciation and Amortization	31,365	29,788	93,272	87,272
Other regulatory charges (credits) - net	33,550	27,619	85,064	61,879
Costs and Expenses	377,265	353,916	1,029,972	1,009,939
OPERATING INCOME	99,966	78,993	199,685	165,385
OTHER INCOME
Allowance for equity funds used during construction	2,222	1,849	5,716	4,762
Investment Income, Net	601	244	1,698	656
Miscellaneous - net	468	1,255	(154)	679
TOTAL	3,291	3,348	7,260	6,097
INTEREST EXPENSE
Interest expense	21,760	21,714	65,646	64,949
Allowance for borrowed funds used during construction	(1,253)	(1,134)	(3,224)	(2,896)
TOTAL	20,507	20,580	62,422	62,053
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	82,750	61,761	144,523	109,429
Income taxes	16,904	22,173	30,538	37,886
Net Income (Loss) Available to Common Stockholders, Basic	65,846	39,588	113,985	71,543
Entergy Texas [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	477,231	432,909	1,229,657	1,175,324
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	153,673	163,532	463,933	474,241
System Energy [Member]
Operation and Maintenance:
Fuel, fuel-related expenses, and gas purchased for resale	14,484	16,170	44,939	53,164
Nuclear refueling outage expenses	5,906	4,435	12,698	13,595
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses	48,969	49,871	143,003	149,325
Decommissioning	8,626	8,290	25,624	34,974
Taxes, Other	7,106	6,679	21,069	19,767
Other Depreciation and Amortization	4,355	34,524	71,143	105,152
Other regulatory charges (credits) - net	7,398	(2,843)	(15,080)	(24,626)
Costs and Expenses	96,844	117,126	303,396	351,351
OPERATING INCOME	(17,879)	38,980	36,468	124,498
OTHER INCOME
Allowance for equity funds used during construction	2,028	1,736	7,032	4,148
Investment Income, Net	23,738	6,624	33,567	15,021
Miscellaneous - net	(1,421)	(1,651)	(4,391)	(5,139)
TOTAL	24,345	6,709	36,208	14,030
INTEREST EXPENSE
Interest expense	9,753	9,169	28,734	27,469
Allowance for borrowed funds used during construction	(515)	(425)	(1,783)	(1,014)
TOTAL	9,238	8,744	26,951	26,455
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	(2,772)	36,945	45,725	112,073
Income taxes	(25,744)	16,362	(22,942)	51,793
Net Income (Loss) Available to Common Stockholders, Basic	22,972	20,583	68,667	60,280
System Energy [Member] | Electricity [Member]
REVENUES
Revenue from Contract with Customer, Excluding Assessed Tax	$ 78,965	$ 156,106	$ 339,864	$ 475,849