Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Cash and cash equivalents:
Cash	$ 283,491	$ 34,242
Temporary cash investments	1,180,342	391,480
Total cash and cash equivalents	1,463,833	425,722	$ 983,496	$ 480,975
Securitization recovery trust account	47,000	47,000
Accounts receivable:
Customer	602,278	595,509
Allowance for doubtful accounts	(8,521)	(7,404)
Other	112,368	219,870
Accrued unbilled revenues	369,948	400,617
Total accounts receivable	1,076,073	1,208,592
Fuel inventory - at average cost	160,865	145,476
Public Utilities, Inventory	837,855	824,989
Deferred nuclear refueling outage costs	167,124	157,568
Prepaid Expense and Other Assets, Current	268,201	283,645
TOTAL	3,973,951	3,045,992
OTHER PROPERTY AND INVESTMENTS
Decommissioning trust funds	5,778,285	6,404,030
Non-utility property - at cost (less accumulated depreciation)	335,314	332,864
Other	460,569	496,452
TOTAL	6,574,168	7,233,346
PROPERTY, PLANT, AND EQUIPMENT
Electric	55,524,303	54,271,467
Natural gas	553,323	547,110
Construction work in progress	2,469,130	2,823,291
Nuclear fuel	657,216	677,181
TOTAL PROPERTY, PLANT, AND EQUIPMENT	59,203,972	58,319,049
Less - accumulated depreciation and amortization	23,422,851	23,136,356
PROPERTY, PLANT, AND EQUIPMENT - NET	35,781,121	35,182,693
Regulatory assets:
Other regulatory assets	5,192,780	5,292,055
Deferred Fuel Cost Non Current	240,024	239,892
Goodwill	377,172	377,172
Deferred Income Tax Assets, Net	76,680	64,461
Other	339,133	288,301
Deferred Costs and Other Assets	6,225,789	6,261,881
TOTAL ASSETS	52,555,029	51,723,912
CURRENT LIABILITIES
Currently maturing long-term debt	1,230,015	795,012
Short-term borrowings	1,941,816	1,946,727
Accounts payable	1,502,392	1,499,861
Customer deposits	408,803	409,171
Taxes Payable, Current	189,214	233,455
Interest accrued	189,338	194,129
Deferred fuel costs	228,379	197,687
Current portion of regulatory liability for income taxes - net related to unprotected ADIT	64,339	76,457
Pension and other postretirement liabilities	62,129	66,184
Other	201,514	201,780
TOTAL	6,017,939	5,620,463
NON-CURRENT LIABILITIES
Deferred Income Tax Liabilities, Net	4,384,494	4,401,190
Accumulated deferred investment tax credits	205,041	207,113
Regulatory liability for income taxes - net	1,600,189	1,633,159
Other regulatory liabilities	1,555,188	1,961,005
Decommissioning and asset retirement cost liabilities	6,250,951	6,159,212
Loss Contingency Accrual	498,199	534,028
Pension and other postretirement liabilities	2,689,249	2,798,265
Long-term debt	18,228,528	17,078,643
Deferred Credits and Other Liabilities	646,899	852,749
TOTAL	36,058,738	35,625,364
Subsidiaries' preferred stock without sinking fund	219,385	219,410
Common Shareholders' Equity:
Common Stock, Value, Issued	2,700	2,700
Additional Paid in Capital, Common Stock	6,510,683	6,564,436
Accumulated other comprehensive loss	(398,987)	(446,920)	(551,152)	(557,173)
Less - treasury stock, at cost	5,080,570	5,154,150
TOTAL	10,223,967	10,223,675
Stockholders' Equity Attributable to Noncontrolling Interest	35,000	35,000
Retained Earnings (Accumulated Deficit)	9,190,141	9,257,609
TOTAL	10,258,967	10,258,675	8,970,367	8,844,305
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	52,555,029	51,723,912
Entergy Arkansas [Member]
Cash and cash equivalents:
Cash	628	3,519
Temporary cash investments	136,864	0
Total cash and cash equivalents	137,492	3,519	190,241	119
Securitization recovery trust account	7,480	4,036
Accounts receivable:
Customer	134,111	117,679
Allowance for doubtful accounts	(1,515)	(1,169)
Associated companies	56,787	29,178
Other	35,171	117,653
Accrued unbilled revenues	84,390	108,489
Total accounts receivable	308,944	371,830
Fuel inventory - at average cost	43,164	33,745
Public Utilities, Inventory	211,165	211,320
Deferred nuclear refueling outage costs	54,837	48,875
Prepaid Expense and Other Assets, Current	11,809	14,096
TOTAL	774,891	687,421
OTHER PROPERTY AND INVESTMENTS
Decommissioning trust funds	974,026	1,101,283
Other	344	345
TOTAL	974,370	1,101,628
PROPERTY, PLANT, AND EQUIPMENT
Electric	12,357,569	12,293,483
Construction work in progress	283,324	197,775
Nuclear fuel	175,884	195,547
TOTAL PROPERTY, PLANT, AND EQUIPMENT	12,816,777	12,686,805
Less - accumulated depreciation and amortization	5,079,545	5,019,826
PROPERTY, PLANT, AND EQUIPMENT - NET	7,737,232	7,666,979
Regulatory assets:
Other regulatory assets	1,680,037	1,666,850
Deferred Fuel Cost Non Current	67,822	67,690
Other	21,451	15,065
Deferred Costs and Other Assets	1,769,310	1,749,605
TOTAL ASSETS	11,255,803	11,205,633
CURRENT LIABILITIES
Currently maturing long-term debt	395,000	0
Associated companies accounts payable	38,534	111,785
Accounts payable	199,451	202,201
Customer deposits	101,371	101,411
Taxes Payable, Current	91,133	81,831
Interest accrued	39,627	22,788
Deferred fuel costs	77,447	53,721
Current portion of regulatory liability for income taxes - net related to unprotected ADIT	0	9,296
Other	40,049	38,760
TOTAL	982,612	621,793
NON-CURRENT LIABILITIES
Deferred Income Tax Liabilities, Net	1,200,932	1,183,126
Accumulated deferred investment tax credits	31,401	31,701
Regulatory liability for income taxes - net	469,439	478,174
Other regulatory liabilities	415,597	559,555
Decommissioning and asset retirement cost liabilities	1,260,556	1,242,616
Loss Contingency Accrual	68,575	63,880
Pension and other postretirement liabilities	330,772	319,075
Long-term debt	3,260,723	3,517,208
Deferred Credits and Other Liabilities	64,664	62,568
TOTAL	7,102,659	7,457,903
Common Shareholders' Equity:
Members' Equity	3,170,532	3,125,937
TOTAL	3,170,532	3,125,937	3,022,224	2,983,103
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	11,255,803	11,205,633
Entergy Louisiana [Member]
Cash and cash equivalents:
Cash	188	488
Temporary cash investments	465,206	1,518
Total cash and cash equivalents	465,394	2,006	305,163	43,364
Securitization recovery trust account	9,000	3,700
Accounts receivable:
Customer	200,410	194,869
Allowance for doubtful accounts	(2,452)	(1,902)
Associated companies	142,549	77,212
Other	36,989	42,179
Accrued unbilled revenues	165,525	169,201
Total accounts receivable	543,021	481,559
Fuel inventory - at average cost	42,069	41,613
Public Utilities, Inventory	371,123	354,020
Deferred nuclear refueling outage costs	43,960	56,743
Prepaid Expense and Other Assets, Current	37,778	37,837
Prepaid Taxes	0	7,959
TOTAL	1,503,345	981,737
Investments in and Advances to Affiliates, at Fair Value	1,390,587	1,390,587
OTHER PROPERTY AND INVESTMENTS
Decommissioning trust funds	1,377,881	1,563,812
Non-utility property - at cost (less accumulated depreciation)	315,027	312,896
Storm Reserve Escrow Account	256,402	295,875
Other	12,944	13,476
TOTAL	3,352,841	3,576,646
PROPERTY, PLANT, AND EQUIPMENT
Electric	23,617,789	22,620,365
Natural gas	239,779	235,678
Construction work in progress	689,399	1,383,603
Nuclear fuel	221,397	267,779
TOTAL PROPERTY, PLANT, AND EQUIPMENT	24,768,364	24,507,425
Less - accumulated depreciation and amortization	9,226,377	9,118,524
PROPERTY, PLANT, AND EQUIPMENT - NET	15,541,987	15,388,901
Regulatory assets:
Other regulatory assets	1,259,672	1,315,211
Deferred Fuel Cost Non Current	168,122	168,122
Other	37,122	33,491
Deferred Costs and Other Assets	1,464,916	1,516,824
TOTAL ASSETS	21,863,089	21,464,108
CURRENT LIABILITIES
Currently maturing long-term debt	360,002	320,002
Associated companies accounts payable	49,566	187,615
Accounts payable	486,241	357,206
Customer deposits	153,051	153,097
Taxes Payable, Current	40,881	0
Interest accrued	85,360	87,744
Deferred fuel costs	37,365	55,645
Current portion of regulatory liability for income taxes - net related to unprotected ADIT	31,138	31,138
Other	60,365	64,668
TOTAL	1,303,969	1,257,115
NON-CURRENT LIABILITIES
Deferred Income Tax Liabilities, Net	2,440,159	2,464,513
Accumulated deferred investment tax credits	110,926	112,128
Regulatory liability for income taxes - net	491,694	500,083
Other regulatory liabilities	673,159	794,140
Decommissioning and asset retirement cost liabilities	1,515,981	1,497,349
Loss Contingency Accrual	279,306	320,419
Pension and other postretirement liabilities	655,324	677,619
Long-term debt	7,563,379	6,983,667
Deferred Credits and Other Liabilities	244,721	459,957
TOTAL	13,974,649	13,809,875
Common Shareholders' Equity:
Accumulated other comprehensive loss	14,029	4,562
Members' Equity	6,570,442	6,392,556
TOTAL	6,584,471	6,397,118	5,980,571	5,902,918
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	21,863,089	21,464,108
Entergy Mississippi [Member]
Cash and cash equivalents:
Cash	12	11
Temporary cash investments	7	51,590
Total cash and cash equivalents	19	51,601	885	36,954
Accounts receivable:
Customer	84,644	92,050
Allowance for doubtful accounts	(554)	(636)
Associated companies	4,415	49,257
Other	7,951	14,986
Accrued unbilled revenues	43,964	47,426
Total accounts receivable	140,420	203,083
Fuel inventory - at average cost	18,405	15,139
Public Utilities, Inventory	52,563	57,972
Prepaid Expense and Other Assets, Current	6,147	7,149
TOTAL	217,554	334,944
OTHER PROPERTY AND INVESTMENTS
Non-utility property - at cost (less accumulated depreciation)	4,556	4,560
Escrow accounts	80,328	80,201
TOTAL	84,884	84,761
PROPERTY, PLANT, AND EQUIPMENT
Electric	5,751,292	5,672,589
Construction work in progress	113,864	88,373
TOTAL PROPERTY, PLANT, AND EQUIPMENT	5,865,156	5,760,962
Less - accumulated depreciation and amortization	1,911,652	1,894,000
PROPERTY, PLANT, AND EQUIPMENT - NET	3,953,504	3,866,962
Regulatory assets:
Other regulatory assets	386,456	377,972
Other	15,615	10,105
Deferred Costs and Other Assets	402,071	388,077
TOTAL ASSETS	4,658,013	4,674,744
CURRENT LIABILITIES
Associated companies accounts payable	52,735	48,090
Accounts payable	90,853	94,729
Customer deposits	85,976	85,938
Taxes Payable, Current	32,010	90,661
Interest accrued	25,101	18,900
Deferred fuel costs	83,807	70,402
Other	33,976	32,667
TOTAL	404,458	441,387
NON-CURRENT LIABILITIES
Deferred Income Tax Liabilities, Net	602,881	594,832
Accumulated deferred investment tax credits	9,562	9,602
Regulatory liability for income taxes - net	234,557	236,988
Other regulatory liabilities	18,411	21,512
Decommissioning and asset retirement cost liabilities	9,862	9,727
Loss Contingency Accrual	49,974	50,021
Pension and other postretirement liabilities	96,930	99,406
Long-term debt	1,614,156	1,614,129
Deferred Credits and Other Liabilities	55,045	54,989
TOTAL	2,691,378	2,691,206
Common Shareholders' Equity:
Members' Equity	1,562,177	1,542,151
TOTAL	1,562,177	1,542,151	1,307,624	1,292,226
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	4,658,013	4,674,744
Entergy New Orleans [Member]
Cash and cash equivalents:
Cash	1,026	26
Temporary cash investments	72,289	5,991
Total cash and cash equivalents	73,315	6,017	794	19,677
Securitization recovery trust account	4,871	1,989
Accounts receivable:
Customer	48,544	48,265
Allowance for doubtful accounts	(3,387)	(3,226)
Associated companies	14,876	6,280
Other	4,982	7,378
Accrued unbilled revenues	23,075	25,453
Total accounts receivable	88,090	84,150
Fuel inventory - at average cost	1,945	1,920
Public Utilities, Inventory	13,861	13,522
Prepaid Expense and Other Assets, Current	15,167	4,846
TOTAL	197,249	112,444
OTHER PROPERTY AND INVESTMENTS
Non-utility property - at cost (less accumulated depreciation)	1,016	1,016
Storm Reserve Escrow Account	82,919	82,605
TOTAL	83,935	83,621
PROPERTY, PLANT, AND EQUIPMENT
Electric	1,475,260	1,467,215
Natural gas	313,544	311,432
Construction work in progress	226,714	201,829
TOTAL PROPERTY, PLANT, AND EQUIPMENT	2,015,518	1,980,476
Less - accumulated depreciation and amortization	718,461	715,406
PROPERTY, PLANT, AND EQUIPMENT - NET	1,297,057	1,265,070
Regulatory assets:
Other regulatory assets	257,496	259,363
Deferred Fuel Cost Non Current	4,080	4,080
Other	16,063	10,720
Deferred Costs and Other Assets	277,639	274,163
TOTAL ASSETS	1,855,880	1,735,298
CURRENT LIABILITIES
Currently maturing long-term debt	25,000	25,000
Notes Payable, Related Parties, Current	1,838	1,838
Associated companies accounts payable	34,787	43,222
Accounts payable	36,811	43,963
Customer deposits	28,631	28,493
Taxes Payable, Current	4,424	4,302
Interest accrued	5,987	6,916
Deferred fuel costs	8,620	4,918
Current portion of regulatory liability for income taxes - net related to unprotected ADIT	5,957	9,470
Other	15,494	15,827
TOTAL	167,549	183,949
NON-CURRENT LIABILITIES
Deferred Income Tax Liabilities, Net	357,097	354,536
Accumulated deferred investment tax credits	2,110	2,131
Regulatory liability for income taxes - net	49,419	49,090
Decommissioning and asset retirement cost liabilities	3,582	3,522
Loss Contingency Accrual	89,465	88,542
Long-term debt	640,821	521,539
Notes Payable, Related Parties, Noncurrent	12,529	12,529
Deferred Credits and Other Liabilities	24,543	21,881
TOTAL	1,179,566	1,053,770
Common Shareholders' Equity:
Members' Equity	508,765	497,579
TOTAL	508,765	497,579	453,973	444,950
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	1,855,880	1,735,298
Entergy Texas [Member]
Cash and cash equivalents:
Cash	30	25
Temporary cash investments	159,683	12,904
Total cash and cash equivalents	159,713	12,929	22,229	56
Securitization recovery trust account	26,116	37,720
Accounts receivable:
Customer	64,497	59,365
Allowance for doubtful accounts	(613)	(471)
Associated companies	42,628	24,001
Other	7,177	17,050
Accrued unbilled revenues	52,994	50,048
Total accounts receivable	166,683	149,993
Fuel inventory - at average cost	48,720	47,593
Public Utilities, Inventory	45,647	46,056
Prepaid Expense and Other Assets, Current	15,481	21,012
TOTAL	462,360	315,303
OTHER PROPERTY AND INVESTMENTS
Investment in affiliates - at equity	384	396
Non-utility property - at cost (less accumulated depreciation)	376	376
Other	20,299	20,077
TOTAL	21,059	20,849
PROPERTY, PLANT, AND EQUIPMENT
Electric	5,274,289	5,199,027
Construction work in progress	897,690	760,354
TOTAL PROPERTY, PLANT, AND EQUIPMENT	6,171,979	5,959,381
Less - accumulated depreciation and amortization	1,796,382	1,770,852
PROPERTY, PLANT, AND EQUIPMENT - NET	4,375,597	4,188,529
Regulatory assets:
Other regulatory assets	478,339	512,648
Other	45,926	33,393
Deferred Costs and Other Assets	524,265	546,041
TOTAL ASSETS	5,383,281	5,070,722
CURRENT LIABILITIES
Associated companies accounts payable	44,446	58,055
Accounts payable	156,817	188,460
Customer deposits	39,774	40,232
Taxes Payable, Current	29,111	49,708
Interest accrued	11,612	18,992
Deferred fuel costs	21,139	13,001
Current portion of regulatory liability for income taxes - net related to unprotected ADIT	27,244	26,552
Other	10,223	10,521
TOTAL	340,366	405,521
NON-CURRENT LIABILITIES
Deferred Income Tax Liabilities, Net	594,102	585,413
Accumulated deferred investment tax credits	10,405	10,559
Regulatory liability for income taxes - net	215,551	225,980
Other regulatory liabilities	42,968	42,085
Decommissioning and asset retirement cost liabilities	7,736	7,631
Loss Contingency Accrual	8,113	8,108
Long-term debt	2,091,130	1,922,956
Deferred Credits and Other Liabilities	66,266	63,062
TOTAL	3,036,271	2,865,794
Common Shareholders' Equity:
Common Stock, Value, Issued	49,452	49,452
Additional Paid in Capital, Common Stock	955,182	780,182
TOTAL	1,971,644	1,764,407
Stockholders' Equity Attributable to Noncontrolling Interest	35,000	35,000
Retained Earnings (Accumulated Deficit)	967,010	934,773
TOTAL	2,006,644	1,799,407	1,443,744	1,422,402
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	5,383,281	5,070,722
System Energy [Member]
Cash and cash equivalents:
Cash	124	93
Temporary cash investments	92,322	68,441
Total cash and cash equivalents	92,446	68,534	158,301	95,685
Accounts receivable:
Associated companies	54,693	121,972
Other	10,055	7,547
Total accounts receivable	64,748	129,519
Public Utilities, Inventory	111,251	108,766
Deferred nuclear refueling outage costs	41,878	14,493
Prepaid Expense and Other Assets, Current	6,562	6,045
TOTAL	316,885	327,357
OTHER PROPERTY AND INVESTMENTS
Decommissioning trust funds	928,434	1,054,098
TOTAL	928,434	1,054,098
PROPERTY, PLANT, AND EQUIPMENT
Electric	5,095,622	5,070,859
Construction work in progress	227,519	164,996
Nuclear fuel	197,955	149,574
TOTAL PROPERTY, PLANT, AND EQUIPMENT	5,521,096	5,385,429
Less - accumulated depreciation and amortization	3,308,560	3,285,487
PROPERTY, PLANT, AND EQUIPMENT - NET	2,212,536	2,099,942
Regulatory assets:
Other regulatory assets	493,976	490,083
Deferred Income Tax Assets, Net	0	8,023
Other	3,170	3,192
Deferred Costs and Other Assets	497,146	501,298
TOTAL ASSETS	3,955,001	3,982,695
CURRENT LIABILITIES
Currently maturing long-term debt	12	10
Associated companies accounts payable	9,683	14,619
Accounts payable	112,284	64,144
Taxes Payable, Current	10,242	13,832
Interest accrued	11,792	11,993
Other	3,383	3,381
TOTAL	147,396	107,979
NON-CURRENT LIABILITIES
Deferred Income Tax Liabilities, Net	812,055	821,963
Accumulated deferred investment tax credits	39,862	40,181
Regulatory liability for income taxes - net	139,529	142,845
Other regulatory liabilities	401,170	533,415
Decommissioning and asset retirement cost liabilities	940,886	931,729
Pension and other postretirement liabilities	107,229	109,816
Long-term debt	604,913	548,097
Deferred Credits and Other Liabilities	35,033	34,602
TOTAL	3,080,677	3,162,648
Common Shareholders' Equity:
Common Stock, Value, Issued	601,850	601,850
Retained Earnings (Accumulated Deficit)	125,078	110,218
TOTAL	726,928	712,068	$ 715,276	$ 737,198
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 3,955,001	$ 3,982,695