Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Cash and cash equivalents:
Cash	$ 57,921	$ 56,629
Temporary cash investments	1,147,675	724,644
Total cash and cash equivalents	1,205,596	781,273
Accounts receivable:
Customer	616,653	673,347
Allowance for doubtful accounts	(14,515)	(13,587)
Other	163,039	169,377
Accrued unbilled revenues	316,624	383,813
Total accounts receivable	1,081,801	1,212,950
Deferred fuel costs	83,445	95,746
Fuel inventory - at average cost	198,904	182,643
Materials and supplies - at average cost	741,677	723,222
Deferred nuclear refueling outage costs	112,365	133,164
Prepayments and other	231,946	156,333
TOTAL	3,655,734	3,285,331
OTHER PROPERTY AND INVESTMENTS
Investment in affiliates - at equity	198	198
Decommissioning trust funds	7,115,686	7,211,993
Non-utility property - at cost (less accumulated depreciation)	289,074	260,980
Other	433,868	441,862
TOTAL	7,838,826	7,915,033
PROPERTY, PLANT, AND EQUIPMENT
Electric	47,515,661	47,287,370
Property under capital lease	620,419	620,544
Natural gas	462,756	453,162
Construction work in progress	2,347,660	1,980,508
Nuclear fuel	857,893	923,200
TOTAL PROPERTY, PLANT, AND EQUIPMENT	51,804,389	51,264,784
Less - accumulated depreciation and amortization	21,701,715	21,600,424
PROPERTY, PLANT, AND EQUIPMENT - NET	30,102,674	29,664,360
Regulatory assets:
Other regulatory assets	4,851,338	4,935,689
Deferred fuel costs	239,347	239,298
Goodwill	377,172	377,172
Accumulated deferred income taxes	21,144	178,204
Other	195,290	112,062
TOTAL	5,684,291	5,842,425
TOTAL ASSETS	47,281,525	46,707,149
CURRENT LIABILITIES
Currently maturing long-term debt	1,260,008	760,007
Notes payable and commercial paper	805,131	1,578,308
Accounts payable	1,260,718	1,452,216
Customer deposits	403,072	401,330
Taxes Payable, Current	158,667	214,967
Interest accrued	177,961	187,972
Deferred fuel costs	58,032	146,522
Obligations under capital leases	1,419	1,502
Pension and other postretirement liabilities	63,612	71,612
Current portion of regulatory liability for income taxes - net related to unprotected ADIT	912,103	0
Other	131,949	221,771
TOTAL	5,232,672	5,036,207
NON-CURRENT LIABILITIES
Accumulated deferred income taxes and taxes accrued	4,452,168	4,466,503
Accumulated deferred investment tax credits	217,502	219,634
Regulatory liability for income taxes - net	1,981,963	2,900,204
Obligations under capital leases	21,632	22,015
Other regulatory liabilities	1,563,278	1,588,520
Decommissioning and asset retirement cost liabilities	6,328,664	6,185,814
Accumulated provisions	489,026	478,273
Pension and other postretirement liabilities	2,821,236	2,910,654
Long-term debt	15,591,628	14,315,259
Other	409,014	393,748
TOTAL	33,876,111	33,480,624
Subsidiaries' preferred stock without sinking fund	197,799	197,803
Common Shareholders' Equity:
Common stock	2,548	2,548
Paid-in capital	5,417,263	5,433,433
Retained earnings	8,493,790	7,977,702
Accumulated other comprehensive loss	(561,498)	(23,531)
Less - treasury stock, at cost	5,377,160	5,397,637
TOTAL	7,974,943	7,992,515
TOTAL	7,974,943	7,992,515
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	47,281,525	46,707,149
Entergy Arkansas [Member]
Cash and cash equivalents:
Cash	891	6,184
Temporary cash investments	32	32
Total cash and cash equivalents	923	6,216
Securitization recovery trust account	7,893	3,748
Accounts receivable:
Customer	127,821	110,016
Allowance for doubtful accounts	(1,250)	(1,063)
Associated companies	34,105	38,765
Other	46,631	65,209
Accrued unbilled revenues	79,707	105,120
Total accounts receivable	287,014	318,047
Deferred fuel costs	61,282	63,302
Fuel inventory - at average cost	43,226	29,358
Materials and supplies - at average cost	198,585	192,853
Deferred nuclear refueling outage costs	49,047	56,485
Prepayments and other	9,597	12,108
TOTAL	657,567	682,117
OTHER PROPERTY AND INVESTMENTS
Decommissioning trust funds	935,728	944,890
Other	786	3,160
TOTAL	936,514	948,050
PROPERTY, PLANT, AND EQUIPMENT
Electric	11,111,420	11,059,538
Construction work in progress	361,843	280,888
Nuclear fuel	226,435	277,345
TOTAL PROPERTY, PLANT, AND EQUIPMENT	11,699,698	11,617,771
Less - accumulated depreciation and amortization	4,827,210	4,762,352
PROPERTY, PLANT, AND EQUIPMENT - NET	6,872,488	6,855,419
Regulatory assets:
Other regulatory assets	1,553,602	1,567,437
Deferred fuel costs	67,145	67,096
Other	20,397	13,910
TOTAL	1,641,144	1,648,443
TOTAL ASSETS	10,107,713	10,134,029
CURRENT LIABILITIES
Short-term borrowings	43,887	49,974
Associated companies accounts payable	308,104	365,915
Other	169,916	215,942
Customer deposits	97,885	97,687
Taxes Payable, Current	57,393	47,321
Interest accrued	27,963	18,215
Current portion of regulatory liability for income taxes - net related to unprotected ADIT	386,489	0
Other	28,730	29,922
TOTAL	1,120,367	824,976
NON-CURRENT LIABILITIES
Accumulated deferred income taxes and taxes accrued	1,205,470	1,190,669
Accumulated deferred investment tax credits	33,803	34,104
Regulatory liability for income taxes - net	597,025	985,823
Other regulatory liabilities	352,354	363,591
Decommissioning and asset retirement cost liabilities	995,973	981,213
Accumulated provisions	41,249	34,729
Pension and other postretirement liabilities	334,016	353,274
Long-term debt	2,978,569	2,952,399
Other	4,885	5,147
TOTAL	6,543,344	6,900,949
Subsidiaries' preferred stock without sinking fund	31,350	31,350
Common Shareholders' Equity:
Common stock	470	470
Paid-in capital	790,264	790,264
Retained earnings	1,621,918	1,586,020
TOTAL	2,412,652	2,376,754
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	10,107,713	10,134,029
Entergy Louisiana [Member]
Cash and cash equivalents:
Cash	385	5,836
Temporary cash investments	561,901	30,071
Total cash and cash equivalents	562,286	35,907
Accounts receivable:
Customer	219,522	254,308
Allowance for doubtful accounts	(9,137)	(8,430)
Associated companies	306,933	143,524
Other	64,776	60,893
Accrued unbilled revenues	137,696	153,118
Total accounts receivable	719,790	603,413
Fuel inventory - at average cost	41,130	39,728
Materials and supplies - at average cost	309,433	299,881
Deferred nuclear refueling outage costs	52,723	65,711
Prepayments and other	41,147	34,035
TOTAL	1,726,509	1,078,675
OTHER PROPERTY AND INVESTMENTS
Investment in affiliates - at equity	1,390,587	1,390,587
Decommissioning trust funds	1,304,423	1,312,073
Non-utility property - at cost (less accumulated depreciation)	273,388	245,255
Storm Reserve Escrow Account	285,612	284,759
Other	14,407	18,999
TOTAL	3,268,417	3,251,673
PROPERTY, PLANT, AND EQUIPMENT
Electric	19,722,068	19,678,536
Natural gas	195,230	191,899
Construction work in progress	1,490,196	1,281,452
Nuclear fuel	275,750	337,402
TOTAL PROPERTY, PLANT, AND EQUIPMENT	21,683,244	21,489,289
Less - accumulated depreciation and amortization	8,597,382	8,703,047
PROPERTY, PLANT, AND EQUIPMENT - NET	13,085,862	12,786,242
Regulatory assets:
Other regulatory assets	1,117,263	1,145,842
Deferred fuel costs	168,122	168,122
Other	23,323	18,310
TOTAL	1,308,708	1,332,274
TOTAL ASSETS	19,389,496	18,448,864
CURRENT LIABILITIES
Currently maturing long-term debt	675,002	675,002
Short-term borrowings	62,922	43,540
Associated companies accounts payable	86,427	126,685
Other	375,783	404,374
Customer deposits	151,492	150,623
Taxes Payable, Current	0	18,157
Interest accrued	81,893	75,528
Deferred fuel costs	19,357	71,447
Current portion of regulatory liability for income taxes - net related to unprotected ADIT	217,850	0
Other	63,165	79,037
TOTAL	1,733,891	1,644,393
NON-CURRENT LIABILITIES
Accumulated deferred income taxes and taxes accrued	2,144,037	2,050,371
Accumulated deferred investment tax credits	120,652	121,870
Regulatory liability for income taxes - net	506,092	725,368
Other regulatory liabilities	756,397	761,059
Decommissioning and asset retirement cost liabilities	1,240,833	1,140,461
Accumulated provisions	301,967	302,448
Pension and other postretirement liabilities	730,116	748,384
Long-term debt	6,263,437	5,469,069
Other	175,941	176,637
TOTAL	12,239,472	11,495,667
Common Shareholders' Equity:
Accumulated other comprehensive loss	(56,950)	(46,400)
Members' Equity	5,473,083	5,355,204
TOTAL	5,416,133	5,308,804
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	19,389,496	18,448,864
Entergy Mississippi [Member]
Cash and cash equivalents:
Cash	13	1,607
Temporary cash investments	290	4,489
Total cash and cash equivalents	303	6,096
Accounts receivable:
Customer	83,092	72,039
Allowance for doubtful accounts	(635)	(574)
Associated companies	39,490	45,081
Other	14,768	9,738
Accrued unbilled revenues	41,174	54,256
Total accounts receivable	177,889	180,540
Deferred fuel costs	18,627	32,444
Fuel inventory - at average cost	46,373	45,606
Materials and supplies - at average cost	42,957	42,571
Prepayments and other	8,120	7,041
TOTAL	294,269	314,298
OTHER PROPERTY AND INVESTMENTS
Non-utility property - at cost (less accumulated depreciation)	4,588	4,592
Escrow accounts	32,061	31,969
TOTAL	36,649	36,561
PROPERTY, PLANT, AND EQUIPMENT
Electric	4,725,645	4,660,297
Property under capital lease	0	125
Construction work in progress	146,168	149,367
TOTAL PROPERTY, PLANT, AND EQUIPMENT	4,871,813	4,809,789
Less - accumulated depreciation and amortization	1,711,157	1,681,306
PROPERTY, PLANT, AND EQUIPMENT - NET	3,160,656	3,128,483
Regulatory assets:
Other regulatory assets	393,323	397,909
Other	5,679	2,124
TOTAL	399,002	400,033
TOTAL ASSETS	3,890,576	3,879,375
CURRENT LIABILITIES
Associated companies accounts payable	117,633	55,689
Other	55,887	77,326
Customer deposits	83,574	83,654
Taxes Payable, Current	26,599	82,843
Interest accrued	17,353	22,901
Current portion of regulatory liability for income taxes - net related to unprotected ADIT	162,140	0
Other	8,708	12,785
TOTAL	471,894	335,198
NON-CURRENT LIABILITIES
Accumulated deferred income taxes and taxes accrued	497,129	488,806
Accumulated deferred investment tax credits	8,827	8,867
Regulatory liability for income taxes - net	248,739	411,011
Decommissioning and asset retirement cost liabilities	9,348	9,219
Accumulated provisions	49,518	44,764
Pension and other postretirement liabilities	96,893	101,498
Long-term debt	1,270,399	1,270,122
Other	16,973	11,639
TOTAL	2,197,826	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	1,000,982	978,377
TOTAL	1,200,475	1,177,870
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	3,890,576	3,879,375
Entergy New Orleans [Member]
Cash and cash equivalents:
Cash	26	30
Temporary cash investments	1,334	32,711
Total cash and cash equivalents	1,360	32,741
Securitization recovery trust account	4,836	1,455
Accounts receivable:
Customer	51,744	51,006
Allowance for doubtful accounts	(3,072)	(3,057)
Associated companies	9,576	22,976
Other	10,051	6,471
Accrued unbilled revenues	14,066	20,638
Total accounts receivable	82,365	98,034
Deferred fuel costs	3,535	0
Fuel inventory - at average cost	939	1,890
Materials and supplies - at average cost	11,562	10,381
Prepaid Taxes	39,830	26,479
Prepayments and other	18,794	8,030
TOTAL	163,221	179,010
OTHER PROPERTY AND INVESTMENTS
Non-utility property - at cost (less accumulated depreciation)	1,016	1,016
Storm Reserve Escrow Account	79,775	79,546
Other	0	2,373
TOTAL	80,791	82,935
PROPERTY, PLANT, AND EQUIPMENT
Electric	1,314,262	1,302,235
Natural gas	267,527	261,263
Construction work in progress	71,845	46,993
TOTAL PROPERTY, PLANT, AND EQUIPMENT	1,653,634	1,610,491
Less - accumulated depreciation and amortization	643,737	631,178
PROPERTY, PLANT, AND EQUIPMENT - NET	1,009,897	979,313
Regulatory assets:
Other regulatory assets	244,207	251,433
Deferred fuel costs	4,080	4,080
Other	1,843	1,065
TOTAL	250,130	256,578
TOTAL ASSETS	1,504,039	1,497,836
CURRENT LIABILITIES
Current Payable Due Associated Company	2,077	2,077
Associated companies accounts payable	43,119	47,472
Other	29,267	29,777
Customer deposits	28,727	28,442
Interest accrued	5,406	5,487
Deferred fuel costs	0	7,774
Current portion of regulatory liability for income taxes - net related to unprotected ADIT	27,857	0
Other	4,564	7,351
TOTAL	141,017	128,380
NON-CURRENT LIABILITIES
Accumulated deferred income taxes and taxes accrued	302,461	283,302
Accumulated deferred investment tax credits	2,296	2,323
Regulatory liability for income taxes - net	90,359	119,259
Decommissioning and asset retirement cost liabilities	3,128	3,076
Accumulated provisions	85,279	85,083
Pension and other postretirement liabilities	17,061	20,755
Long-term debt	418,572	418,447
Long-Term Payable Due Associated Company	16,346	16,346
Other	7,340	5,317
TOTAL	942,842	953,908
Common Shareholders' Equity:
Common stock	420,180	415,548
TOTAL	420,180	415,548
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	1,504,039	1,497,836
Entergy Texas [Member]
Cash and cash equivalents:
Cash	26	32
Temporary cash investments	38,950	115,481
Total cash and cash equivalents	38,976	115,513
Securitization recovery trust account	29,698	37,683
Accounts receivable:
Customer	63,979	74,382
Allowance for doubtful accounts	(422)	(463)
Associated companies	68,569	90,629
Other	7,450	9,831
Accrued unbilled revenues	43,982	50,682
Total accounts receivable	183,558	225,061
Fuel inventory - at average cost	42,865	42,731
Materials and supplies - at average cost	39,294	38,605
Prepayments and other	13,502	19,710
TOTAL	347,893	479,303
OTHER PROPERTY AND INVESTMENTS
Investment in affiliates - at equity	481	457
Non-utility property - at cost (less accumulated depreciation)	376	376
Other	19,454	19,235
TOTAL	20,311	20,068
PROPERTY, PLANT, AND EQUIPMENT
Electric	4,614,489	4,569,295
Construction work in progress	122,764	102,088
TOTAL PROPERTY, PLANT, AND EQUIPMENT	4,737,253	4,671,383
Less - accumulated depreciation and amortization	1,603,585	1,579,387
PROPERTY, PLANT, AND EQUIPMENT - NET	3,133,668	3,091,996
Regulatory assets:
Other regulatory assets	640,901	661,398
Other	28,731	26,973
TOTAL	669,632	688,371
TOTAL ASSETS	4,171,504	4,279,738
CURRENT LIABILITIES
Currently maturing long-term debt	500,000	0
Associated companies accounts payable	51,454	59,347
Other	87,369	126,095
Customer deposits	41,395	40,925
Taxes Payable, Current	49,640	45,659
Interest accrued	19,981	25,556
Deferred fuel costs	38,675	67,301
Current portion of regulatory liability for income taxes - net related to unprotected ADIT	41,325	0
Other	6,926	8,132
TOTAL	836,765	373,015
NON-CURRENT LIABILITIES
Accumulated deferred income taxes and taxes accrued	522,688	544,642
Accumulated deferred investment tax credits	11,790	11,983
Regulatory liability for income taxes - net	372,230	412,620
Other regulatory liabilities	11,060	6,850
Decommissioning and asset retirement cost liabilities	6,930	6,835
Accumulated provisions	9,907	10,115
Pension and other postretirement liabilities	11,008	17,853
Long-term debt	1,062,555	1,587,150
Other	49,054	48,508
TOTAL	2,057,222	2,646,556
Common Shareholders' Equity:
Common stock	49,452	49,452
Paid-in capital	596,994	596,994
Retained earnings	631,071	613,721
TOTAL	1,277,517	1,260,167
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	4,171,504	4,279,738
System Energy [Member]
Cash and cash equivalents:
Cash	47	78
Temporary cash investments	278,652	287,109
Total cash and cash equivalents	278,699	287,187
Accounts receivable:
Associated companies	142,321	170,149
Other	6,940	6,526
Total accounts receivable	149,261	176,675
Materials and supplies - at average cost	89,431	88,424
Deferred nuclear refueling outage costs	9,668	7,908
Prepayments and other	5,596	2,489
TOTAL	532,655	562,683
OTHER PROPERTY AND INVESTMENTS
Decommissioning trust funds	896,219	905,686
TOTAL	896,219	905,686
PROPERTY, PLANT, AND EQUIPMENT
Electric	4,331,713	4,327,849
Property under capital lease	588,281	588,281
Construction work in progress	100,467	69,937
Nuclear fuel	248,372	207,513
TOTAL PROPERTY, PLANT, AND EQUIPMENT	5,268,833	5,193,580
Less - accumulated depreciation and amortization	3,203,002	3,175,018
PROPERTY, PLANT, AND EQUIPMENT - NET	2,065,831	2,018,562
Regulatory assets:
Other regulatory assets	446,287	444,327
Other	11,363	7,629
TOTAL	457,650	451,956
TOTAL ASSETS	3,952,355	3,938,887
CURRENT LIABILITIES
Currently maturing long-term debt	85,005	85,004
Short-term borrowings	43,170	17,830
Associated companies accounts payable	6,189	16,878
Other	65,448	62,868
Taxes Payable, Current	31,551	46,584
Interest accrued	14,125	13,389
Current portion of regulatory liability for income taxes - net related to unprotected ADIT	76,442	0
Other	2,437	2,434
TOTAL	324,367	244,987
NON-CURRENT LIABILITIES
Accumulated deferred income taxes and taxes accrued	785,726	776,420
Accumulated deferred investment tax credits	39,087	39,406
Regulatory liability for income taxes - net	167,518	246,122
Other regulatory liabilities	439,165	455,991
Decommissioning and asset retirement cost liabilities	870,120	861,664
Pension and other postretirement liabilities	118,337	121,874
Long-term debt	516,577	466,484
Other	21,581	15,130
TOTAL	2,958,111	2,983,091
Common Shareholders' Equity:
Common stock	601,850	658,350
Retained earnings	68,027	52,459
TOTAL	669,877	710,809
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 3,952,355	$ 3,938,887