Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017	Dec. 31, 2016
Cash and cash equivalents:
Cash	$ 55,197	$ 56,629
Temporary cash investments	757,590	724,644
Total cash and cash equivalents	812,787	781,273	$ 934,495	$ 1,187,844
Accounts receivable:
Customer	662,746	673,347
Allowance for doubtful accounts	(14,545)	(13,587)
Other	150,084	169,377
Accrued unbilled revenues	460,181	383,813
Total accounts receivable	1,258,466	1,212,950
Deferred fuel costs	114,293	95,746
Fuel inventory - at average cost	174,131	182,643
Materials and supplies - at average cost	752,520	723,222
Deferred nuclear refueling outage costs	172,608	133,164
Prepayments and other	249,645	156,333
TOTAL	3,534,450	3,285,331
OTHER PROPERTY AND INVESTMENTS
Investment in affiliates - at equity	198	198
Decommissioning trust funds	7,217,298	7,211,993
Non-utility property - at cost (less accumulated depreciation)	294,548	260,980
Other	434,066	441,862
TOTAL	7,946,110	7,915,033
PROPERTY, PLANT, AND EQUIPMENT
Electric	47,805,468	47,287,370
Property under capital lease	620,419	620,544
Natural gas	477,715	453,162
Construction work in progress	2,559,790	1,980,508
Nuclear fuel	866,229	923,200
TOTAL PROPERTY, PLANT, AND EQUIPMENT	52,329,621	51,264,784
Less - accumulated depreciation and amortization	21,817,508	21,600,424
PROPERTY, PLANT, AND EQUIPMENT - NET	30,512,113	29,664,360
Regulatory assets:
Other regulatory assets	4,828,973	4,935,689
Deferred fuel costs	239,397	239,298
Goodwill	377,172	377,172
Accumulated deferred income taxes	17,768	178,204
Other	166,666	112,062
TOTAL	5,629,976	5,842,425
TOTAL ASSETS	47,622,649	46,707,149
CURRENT LIABILITIES
Currently maturing long-term debt	1,016,908	760,007
Notes payable and commercial paper	1,984,103	1,578,308
Accounts payable	1,459,432	1,452,216
Customer deposits	404,880	401,330
Taxes Payable, Current	206,874	214,967
Interest accrued	185,916	187,972
Deferred fuel costs	32,904	146,522
Obligations under capital leases	1,442	1,502
Pension and other postretirement liabilities	61,580	71,612
Current portion of regulatory liability for income taxes - net related to unprotected ADIT	710,108	0
Other	167,926	221,771
TOTAL	6,232,073	5,036,207
NON-CURRENT LIABILITIES
Accumulated deferred income taxes and taxes accrued	4,434,308	4,466,503
Accumulated deferred investment tax credits	215,369	219,634
Regulatory liability for income taxes - net	1,901,043	2,900,204
Obligations under capital leases	21,263	22,015
Other regulatory liabilities	1,630,335	1,588,520
Decommissioning and asset retirement cost liabilities	6,398,980	6,185,814
Accumulated provisions	505,764	478,273
Pension and other postretirement liabilities	2,739,407	2,910,654
Long-term debt	14,857,686	14,315,259
Other	466,189	393,748
TOTAL	33,170,344	33,480,624
Subsidiaries' preferred stock without sinking fund	197,771	197,803
Common Shareholders' Equity:
Common stock	2,548	2,548
Paid-in capital	5,429,404	5,433,433
Retained earnings	8,578,276	7,977,702
Accumulated other comprehensive loss	(613,642)	(23,531)	52,773	(34,971)
Less - treasury stock, at cost	5,374,125	5,397,637
TOTAL	8,022,461	7,992,515
TOTAL	8,022,461	7,992,515	8,370,856	8,081,809
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	47,622,649	46,707,149
Entergy Arkansas [Member]
Cash and cash equivalents:
Cash	239	6,184
Temporary cash investments	232,829	32
Total cash and cash equivalents	233,068	6,216	3,077	20,509
Securitization recovery trust account	4,027	3,748
Accounts receivable:
Customer	108,351	110,016
Allowance for doubtful accounts	(1,086)	(1,063)
Associated companies	93,367	38,765
Other	44,978	65,209
Accrued unbilled revenues	136,236	105,120
Total accounts receivable	381,846	318,047
Deferred fuel costs	69,099	63,302
Fuel inventory - at average cost	17,069	29,358
Materials and supplies - at average cost	193,849	192,853
Deferred nuclear refueling outage costs	61,618	56,485
Prepayments and other	22,112	12,108
TOTAL	982,688	682,117
OTHER PROPERTY AND INVESTMENTS
Decommissioning trust funds	954,400	944,890
Other	785	3,160
TOTAL	955,185	948,050
PROPERTY, PLANT, AND EQUIPMENT
Electric	11,252,167	11,059,538
Construction work in progress	331,715	280,888
Nuclear fuel	219,762	277,345
TOTAL PROPERTY, PLANT, AND EQUIPMENT	11,803,644	11,617,771
Less - accumulated depreciation and amortization	4,848,505	4,762,352
PROPERTY, PLANT, AND EQUIPMENT - NET	6,955,139	6,855,419
Regulatory assets:
Other regulatory assets	1,558,850	1,567,437
Deferred fuel costs	67,195	67,096
Other	16,263	13,910
TOTAL	1,642,308	1,648,443
TOTAL ASSETS	10,535,320	10,134,029
CURRENT LIABILITIES
Currently maturing long-term debt	41,700	0
Short-term borrowings	0	49,974
Associated companies accounts payable	187,846	365,915
Other	174,639	215,942
Customer deposits	98,551	97,687
Taxes Payable, Current	113,821	47,321
Interest accrued	19,475	18,215
Current portion of regulatory liability for income taxes - net related to unprotected ADIT	305,697	0
Other	34,052	29,922
TOTAL	975,781	824,976
NON-CURRENT LIABILITIES
Accumulated deferred income taxes and taxes accrued	1,165,690	1,190,669
Accumulated deferred investment tax credits	33,503	34,104
Regulatory liability for income taxes - net	565,811	985,823
Other regulatory liabilities	366,306	363,591
Decommissioning and asset retirement cost liabilities	1,011,589	981,213
Accumulated provisions	47,182	34,729
Pension and other postretirement liabilities	315,711	353,274
Long-term debt	3,170,724	2,952,399
Other	6,822	5,147
TOTAL	6,683,338	6,900,949
Subsidiaries' preferred stock without sinking fund	31,350	31,350
Common Shareholders' Equity:
Common stock	470	470
Paid-in capital	1,140,264	790,264
Retained earnings	1,704,117	1,586,020
TOTAL	2,844,851	2,376,754	2,305,457	2,253,317
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	10,535,320	10,134,029
Entergy Louisiana [Member]
Cash and cash equivalents:
Cash	195	5,836
Temporary cash investments	28,833	30,071
Total cash and cash equivalents	29,028	35,907	215,283	213,850
Accounts receivable:
Customer	239,031	254,308
Allowance for doubtful accounts	(9,341)	(8,430)
Associated companies	154,965	143,524
Other	61,832	60,893
Accrued unbilled revenues	176,347	153,118
Total accounts receivable	622,834	603,413
Fuel inventory - at average cost	42,309	39,728
Materials and supplies - at average cost	315,966	299,881
Deferred nuclear refueling outage costs	40,229	65,711
Prepaid Taxes	37,919	0
Prepayments and other	54,143	34,035
TOTAL	1,142,428	1,078,675
OTHER PROPERTY AND INVESTMENTS
Investment in affiliates - at equity	1,390,587	1,390,587
Decommissioning trust funds	1,334,879	1,312,073
Non-utility property - at cost (less accumulated depreciation)	277,814	245,255
Storm Reserve Escrow Account	286,743	284,759
Other	14,620	18,999
TOTAL	3,304,643	3,251,673
PROPERTY, PLANT, AND EQUIPMENT
Electric	19,976,144	19,678,536
Natural gas	203,802	191,899
Construction work in progress	1,593,553	1,281,452
Nuclear fuel	261,429	337,402
TOTAL PROPERTY, PLANT, AND EQUIPMENT	22,034,928	21,489,289
Less - accumulated depreciation and amortization	8,686,593	8,703,047
PROPERTY, PLANT, AND EQUIPMENT - NET	13,348,335	12,786,242
Regulatory assets:
Other regulatory assets	1,103,639	1,145,842
Deferred fuel costs	168,122	168,122
Other	26,786	18,310
TOTAL	1,298,547	1,332,274
TOTAL ASSETS	19,093,953	18,448,864
CURRENT LIABILITIES
Currently maturing long-term debt	390,202	675,002
Short-term borrowings	0	43,540
Associated companies accounts payable	92,792	126,685
Other	408,990	404,374
Customer deposits	152,748	150,623
Taxes Payable, Current	0	18,157
Interest accrued	76,318	75,528
Deferred fuel costs	2,706	71,447
Current portion of regulatory liability for income taxes - net related to unprotected ADIT	199,167	0
Other	75,787	79,037
TOTAL	1,398,710	1,644,393
NON-CURRENT LIABILITIES
Accumulated deferred income taxes and taxes accrued	2,180,827	2,050,371
Accumulated deferred investment tax credits	119,435	121,870
Regulatory liability for income taxes - net	494,214	725,368
Other regulatory liabilities	784,235	761,059
Decommissioning and asset retirement cost liabilities	1,256,711	1,140,461
Accumulated provisions	308,251	302,448
Pension and other postretirement liabilities	715,027	748,384
Long-term debt	6,101,521	5,469,069
Other	191,042	176,637
TOTAL	12,151,263	11,495,667
Common Shareholders' Equity:
Accumulated other comprehensive loss	(57,451)	(46,400)
Members' Equity	5,601,431	5,355,204
TOTAL	5,543,980	5,308,804	5,208,709	5,081,809
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	19,093,953	18,448,864
Entergy Mississippi [Member]
Cash and cash equivalents:
Cash	11	1,607
Temporary cash investments	7	4,489
Total cash and cash equivalents	18	6,096	722	76,834
Accounts receivable:
Customer	93,751	72,039
Allowance for doubtful accounts	(648)	(574)
Associated companies	46,456	45,081
Other	9,747	9,738
Accrued unbilled revenues	61,966	54,256
Total accounts receivable	211,272	180,540
Deferred fuel costs	25,912	32,444
Fuel inventory - at average cost	46,583	45,606
Materials and supplies - at average cost	44,675	42,571
Prepayments and other	12,034	7,041
TOTAL	340,494	314,298
OTHER PROPERTY AND INVESTMENTS
Non-utility property - at cost (less accumulated depreciation)	4,584	4,592
Escrow accounts	32,187	31,969
TOTAL	36,771	36,561
PROPERTY, PLANT, AND EQUIPMENT
Electric	4,557,995	4,660,297
Property under capital lease	0	125
Construction work in progress	175,039	149,367
TOTAL PROPERTY, PLANT, AND EQUIPMENT	4,733,034	4,809,789
Less - accumulated depreciation and amortization	1,624,479	1,681,306
PROPERTY, PLANT, AND EQUIPMENT - NET	3,108,555	3,128,483
Regulatory assets:
Other regulatory assets	398,575	397,909
Other	3,398	2,124
TOTAL	401,973	400,033
TOTAL ASSETS	3,887,793	3,879,375
CURRENT LIABILITIES
Associated companies accounts payable	112,877	55,689
Other	111,101	77,326
Customer deposits	83,348	83,654
Taxes Payable, Current	37,107	82,843
Interest accrued	19,109	22,901
Current portion of regulatory liability for income taxes - net related to unprotected ADIT	35,415	0
Other	9,723	12,785
TOTAL	408,680	335,198
NON-CURRENT LIABILITIES
Accumulated deferred income taxes and taxes accrued	520,387	488,806
Accumulated deferred investment tax credits	8,787	8,867
Regulatory liability for income taxes - net	246,670	411,011
Decommissioning and asset retirement cost liabilities	9,840	9,219
Accumulated provisions	52,006	44,764
Pension and other postretirement liabilities	92,161	101,498
Long-term debt	1,270,559	1,270,122
Other	19,844	11,639
TOTAL	2,220,254	2,345,926
Subsidiaries' preferred stock without sinking fund	20,381	20,381
Common Shareholders' Equity:
Common stock	199,326	199,326
Paid-in capital	167	167
Retained earnings	1,038,985	978,377
TOTAL	1,238,478	1,177,870	1,139,775	1,094,791
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	3,887,793	3,879,375
Entergy New Orleans [Member]
Cash and cash equivalents:
Cash	26	30
Temporary cash investments	0	32,711
Total cash and cash equivalents	26	32,741	61,529	103,068
Securitization recovery trust account	1,466	1,455
Accounts receivable:
Customer	58,918	51,006
Allowance for doubtful accounts	(3,068)	(3,057)
Associated companies	10,013	22,976
Other	5,283	6,471
Accrued unbilled revenues	25,095	20,638
Total accounts receivable	96,241	98,034
Deferred fuel costs	19,282	0
Fuel inventory - at average cost	57	1,890
Materials and supplies - at average cost	12,267	10,381
Prepaid Taxes	37,081	26,479
Prepayments and other	17,602	8,030
TOTAL	184,022	179,010
OTHER PROPERTY AND INVESTMENTS
Non-utility property - at cost (less accumulated depreciation)	1,016	1,016
Storm Reserve Escrow Account	80,087	79,546
Other	0	2,373
TOTAL	81,103	82,935
PROPERTY, PLANT, AND EQUIPMENT
Electric	1,323,666	1,302,235
Natural gas	273,913	261,263
Construction work in progress	88,104	46,993
TOTAL PROPERTY, PLANT, AND EQUIPMENT	1,685,683	1,610,491
Less - accumulated depreciation and amortization	647,582	631,178
PROPERTY, PLANT, AND EQUIPMENT - NET	1,038,101	979,313
Regulatory assets:
Other regulatory assets	239,476	251,433
Deferred fuel costs	4,080	4,080
Other	1,841	1,065
TOTAL	245,397	256,578
TOTAL ASSETS	1,548,623	1,497,836
CURRENT LIABILITIES
Current Payable Due Associated Company	2,077	2,077
Associated companies accounts payable	63,887	47,472
Other	43,766	29,777
Customer deposits	28,622	28,442
Interest accrued	5,028	5,487
Deferred fuel costs	0	7,774
Current portion of regulatory liability for income taxes - net related to unprotected ADIT	32,464	0
Other	8,749	7,351
TOTAL	184,593	128,380
NON-CURRENT LIABILITIES
Accumulated deferred income taxes and taxes accrued	305,210	283,302
Accumulated deferred investment tax credits	2,269	2,323
Regulatory liability for income taxes - net	83,499	119,259
Decommissioning and asset retirement cost liabilities	3,182	3,076
Accumulated provisions	85,521	85,083
Pension and other postretirement liabilities	13,013	20,755
Long-term debt	413,372	418,447
Long-Term Payable Due Associated Company	16,346	16,346
Other	11,419	5,317
TOTAL	933,831	953,908
Common Shareholders' Equity:
Common stock	430,199	415,548
TOTAL	430,199	415,548	428,174	426,946
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	1,548,623	1,497,836
Entergy Texas [Member]
Cash and cash equivalents:
Cash	26	32
Temporary cash investments	40,373	115,481
Total cash and cash equivalents	40,399	115,513	1,065	6,181
Securitization recovery trust account	31,216	37,683
Accounts receivable:
Customer	76,417	74,382
Allowance for doubtful accounts	(402)	(463)
Associated companies	70,105	90,629
Other	9,488	9,831
Accrued unbilled revenues	60,538	50,682
Total accounts receivable	216,146	225,061
Fuel inventory - at average cost	44,441	42,731
Materials and supplies - at average cost	39,123	38,605
Prepayments and other	13,288	19,710
TOTAL	384,613	479,303
OTHER PROPERTY AND INVESTMENTS
Investment in affiliates - at equity	470	457
Non-utility property - at cost (less accumulated depreciation)	376	376
Other	19,673	19,235
TOTAL	20,519	20,068
PROPERTY, PLANT, AND EQUIPMENT
Electric	4,653,078	4,569,295
Construction work in progress	142,181	102,088
TOTAL PROPERTY, PLANT, AND EQUIPMENT	4,795,259	4,671,383
Less - accumulated depreciation and amortization	1,625,410	1,579,387
PROPERTY, PLANT, AND EQUIPMENT - NET	3,169,849	3,091,996
Regulatory assets:
Other regulatory assets	621,806	661,398
Other	28,460	26,973
TOTAL	650,266	688,371
TOTAL ASSETS	4,225,247	4,279,738
CURRENT LIABILITIES
Currently maturing long-term debt	500,000	0
Associated companies accounts payable	54,017	59,347
Other	102,657	126,095
Customer deposits	41,610	40,925
Taxes Payable, Current	66,098	45,659
Interest accrued	24,878	25,556
Deferred fuel costs	30,198	67,301
Current portion of regulatory liability for income taxes - net related to unprotected ADIT	66,225	0
Other	11,146	8,132
TOTAL	896,829	373,015
NON-CURRENT LIABILITIES
Accumulated deferred income taxes and taxes accrued	525,129	544,642
Accumulated deferred investment tax credits	11,596	11,983
Regulatory liability for income taxes - net	346,647	412,620
Other regulatory liabilities	16,670	6,850
Decommissioning and asset retirement cost liabilities	7,026	6,835
Accumulated provisions	10,549	10,115
Pension and other postretirement liabilities	4,535	17,853
Long-term debt	1,048,180	1,587,150
Other	49,780	48,508
TOTAL	2,020,112	2,646,556
Common Shareholders' Equity:
Common stock	49,452	49,452
Paid-in capital	596,994	596,994
Retained earnings	661,860	613,721
TOTAL	1,308,306	1,260,167	1,100,949	1,068,994
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	4,225,247	4,279,738
System Energy [Member]
Cash and cash equivalents:
Cash	48	78
Temporary cash investments	258,729	287,109
Total cash and cash equivalents	258,777	287,187	337,600	245,863
Accounts receivable:
Associated companies	107,799	170,149
Other	7,252	6,526
Total accounts receivable	115,051	176,675
Materials and supplies - at average cost	89,033	88,424
Deferred nuclear refueling outage costs	67,807	7,908
Prepayments and other	6,741	2,489
TOTAL	537,409	562,683
OTHER PROPERTY AND INVESTMENTS
Decommissioning trust funds	914,377	905,686
TOTAL	914,377	905,686
PROPERTY, PLANT, AND EQUIPMENT
Electric	4,353,638	4,327,849
Property under capital lease	588,281	588,281
Construction work in progress	147,763	69,937
Nuclear fuel	279,182	207,513
TOTAL PROPERTY, PLANT, AND EQUIPMENT	5,368,864	5,193,580
Less - accumulated depreciation and amortization	3,227,888	3,175,018
PROPERTY, PLANT, AND EQUIPMENT - NET	2,140,976	2,018,562
Regulatory assets:
Other regulatory assets	461,266	444,327
Other	25,411	7,629
TOTAL	486,677	451,956
TOTAL ASSETS	4,079,439	3,938,887
CURRENT LIABILITIES
Currently maturing long-term debt	85,005	85,004
Short-term borrowings	38,873	17,830
Associated companies accounts payable	9,996	16,878
Other	121,846	62,868
Taxes Payable, Current	39,484	46,584
Interest accrued	14,174	13,389
Current portion of regulatory liability for income taxes - net related to unprotected ADIT	71,140	0
Other	2,436	2,434
TOTAL	382,954	244,987
NON-CURRENT LIABILITIES
Accumulated deferred income taxes and taxes accrued	785,699	776,420
Accumulated deferred investment tax credits	38,767	39,406
Regulatory liability for income taxes - net	164,202	246,122
Other regulatory liabilities	453,877	455,991
Decommissioning and asset retirement cost liabilities	878,661	861,664
Pension and other postretirement liabilities	115,323	121,874
Long-term debt	516,657	466,484
Other	50,035	15,130
TOTAL	3,003,221	2,983,091
Common Shareholders' Equity:
Common stock	601,850	658,350
Retained earnings	91,414	52,459
TOTAL	693,264	710,809	$ 778,520	$ 738,823
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 4,079,439	$ 3,938,887