Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Dec. 31, 2016
Cash and cash equivalents:
Cash	$ 64,787	$ 56,629
Temporary cash investments	923,194	724,644
Total cash and cash equivalents	987,981	781,273	$ 546,291	$ 1,187,844
Securitization recovery trust account	58,000	45,000
Accounts receivable:
Customer	789,633	673,347
Allowance for doubtful accounts	(15,589)	(13,587)
Other	166,222	169,377
Accrued unbilled revenues	426,387	383,813
Total accounts receivable	1,366,653	1,212,950
Deferred fuel costs	61,309	95,746
Fuel inventory - at average cost	132,916	182,643
Public Utilities, Inventory	747,770	723,222
Deferred nuclear refueling outage costs	149,810	133,164
Prepaid Expense and Other Assets, Current	248,107	156,333
TOTAL	3,694,546	3,285,331
OTHER PROPERTY AND INVESTMENTS
Investment in affiliates - at equity	198	198
Decommissioning trust funds	7,444,346	7,211,993
Non-utility property - at cost (less accumulated depreciation)	302,784	260,980
Other	436,527	441,862
TOTAL	8,183,855	7,915,033
PROPERTY, PLANT, AND EQUIPMENT
Electric	48,362,347	47,287,370
Property under capital lease	620,419	620,544
Natural gas	488,169	453,162
Construction work in progress	2,832,826	1,980,508
Nuclear fuel	846,845	923,200
TOTAL PROPERTY, PLANT, AND EQUIPMENT	53,150,606	51,264,784
Less - accumulated depreciation and amortization	22,057,870	21,600,424
PROPERTY, PLANT, AND EQUIPMENT - NET	31,092,736	29,664,360
Regulatory assets:
Other regulatory assets	4,728,555	4,935,689
Deferred Fuel Cost Non Current	239,446	239,298
Goodwill	377,172	377,172
Deferred Income Tax Assets, Net	21,307	178,204
Other	133,555	112,062
Deferred Costs and Other Assets	5,500,035	5,842,425
TOTAL ASSETS	48,471,172	46,707,149
CURRENT LIABILITIES
Currently maturing long-term debt	735,009	760,007
Short-term borrowings	1,946,677	1,578,308
Accounts payable	1,392,114	1,452,216
Customer deposits	409,153	401,330
Taxes Payable, Current	258,477	214,967
Interest accrued	178,573	187,972
Deferred fuel costs	86,949	146,522
Obligations under capital leases	1,466	1,502
Pension and other postretirement liabilities	57,471	71,612
Current portion of regulatory liability for income taxes - net related to unprotected ADIT	500,419	0
Other	184,255	221,771
TOTAL	5,750,563	5,036,207
NON-CURRENT LIABILITIES
Deferred Income Tax Liabilities, Net	4,427,744	4,466,503
Accumulated deferred investment tax credits	213,237	219,634
Regulatory liability for income taxes - net	1,802,528	2,900,204
Obligations under capital leases	20,887	22,015
Other regulatory liabilities	1,772,093	1,588,520
Decommissioning and asset retirement cost liabilities	6,555,835	6,185,814
Loss Contingency Accrual	506,959	478,273
Pension and other postretirement liabilities	2,579,270	2,910,654
Long-term debt	15,780,827	14,315,259
Deferred Credits and Other Liabilities	450,746	393,748
TOTAL	34,110,126	33,480,624
Subsidiaries' preferred stock without sinking fund	197,771	197,803
Common Shareholders' Equity:
Common stock	2,548	2,548
Additional Paid in Capital, Common Stock	5,441,696	5,433,433
Retained earnings	8,953,611	7,977,702
Accumulated other comprehensive loss	(632,126)	(23,531)	111,678	(34,971)
Less - treasury stock, at cost	5,353,017	5,397,637
TOTAL	8,412,712	7,992,515	8,690,237	8,081,809
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	48,471,172	46,707,149
Entergy Arkansas [Member]
Cash and cash equivalents:
Cash	13,121	6,184
Temporary cash investments	208,661	32
Total cash and cash equivalents	221,782	6,216	464	20,509
Securitization recovery trust account	8,570	3,748
Accounts receivable:
Customer	141,294	110,016
Allowance for doubtful accounts	(1,420)	(1,063)
Associated companies	57,253	38,765
Other	51,756	65,209
Accrued unbilled revenues	116,007	105,120
Total accounts receivable	364,890	318,047
Deferred fuel costs	38,691	63,302
Fuel inventory - at average cost	21,835	29,358
Public Utilities, Inventory	196,623	192,853
Deferred nuclear refueling outage costs	57,683	56,485
Prepaid Expense and Other Assets, Current	22,316	12,108
TOTAL	932,390	682,117
OTHER PROPERTY AND INVESTMENTS
Decommissioning trust funds	996,857	944,890
Other	785	3,160
TOTAL	997,642	948,050
PROPERTY, PLANT, AND EQUIPMENT
Electric	11,376,058	11,059,538
Construction work in progress	350,554	280,888
Nuclear fuel	240,582	277,345
TOTAL PROPERTY, PLANT, AND EQUIPMENT	11,967,194	11,617,771
Less - accumulated depreciation and amortization	4,908,917	4,762,352
PROPERTY, PLANT, AND EQUIPMENT - NET	7,058,277	6,855,419
Regulatory assets:
Other regulatory assets	1,544,863	1,567,437
Deferred Fuel Cost Non Current	67,244	67,096
Other	18,252	13,910
Deferred Costs and Other Assets	1,630,359	1,648,443
TOTAL ASSETS	10,618,668	10,134,029
CURRENT LIABILITIES
Short-term borrowings	0	49,974
Associated companies accounts payable	183,372	365,915
Accounts payable	172,820	215,942
Customer deposits	99,138	97,687
Taxes Payable, Current	78,007	47,321
Interest accrued	31,773	18,215
Current portion of regulatory liability for income taxes - net related to unprotected ADIT	179,712	0
Other	32,411	29,922
TOTAL	777,233	824,976
NON-CURRENT LIABILITIES
Deferred Income Tax Liabilities, Net	1,235,625	1,190,669
Accumulated deferred investment tax credits	33,203	34,104
Regulatory liability for income taxes - net	533,179	985,823
Other regulatory liabilities	418,005	363,591
Decommissioning and asset retirement cost liabilities	1,026,816	981,213
Loss Contingency Accrual	44,742	34,729
Pension and other postretirement liabilities	288,870	353,274
Long-term debt	3,242,282	2,952,399
Deferred Credits and Other Liabilities	13,979	5,147
TOTAL	6,836,701	6,900,949
Subsidiaries' preferred stock without sinking fund	31,350	31,350
Common Shareholders' Equity:
Common stock	470	470
Additional Paid in Capital, Common Stock	1,140,264	790,264
Retained earnings	1,832,650	1,586,020
TOTAL	2,973,384	2,376,754	2,397,738	2,253,317
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	10,618,668	10,134,029
Entergy Louisiana [Member]
Cash and cash equivalents:
Cash	363	5,836
Temporary cash investments	213,222	30,071
Total cash and cash equivalents	213,585	35,907	55,523	213,850
Securitization recovery trust account	10,000	2,000
Accounts receivable:
Customer	296,121	254,308
Allowance for doubtful accounts	(9,634)	(8,430)
Associated companies	137,252	143,524
Other	65,677	60,893
Accrued unbilled revenues	177,722	153,118
Total accounts receivable	667,138	603,413
Fuel inventory - at average cost	33,608	39,728
Public Utilities, Inventory	326,192	299,881
Deferred nuclear refueling outage costs	29,313	65,711
Prepaid Expense and Other Assets, Current	47,105	34,035
Prepaid Taxes	4,736	0
TOTAL	1,321,677	1,078,675
Investments in and Advances to Affiliates, at Fair Value	1,390,587	1,390,587
OTHER PROPERTY AND INVESTMENTS
Decommissioning trust funds	1,395,216	1,312,073
Non-utility property - at cost (less accumulated depreciation)	285,099	245,255
Storm Reserve Escrow Account	288,056	284,759
Other	14,773	18,999
TOTAL	3,373,731	3,251,673
PROPERTY, PLANT, AND EQUIPMENT
Electric	20,204,568	19,678,536
Natural gas	208,480	191,899
Construction work in progress	1,737,898	1,281,452
Nuclear fuel	219,139	337,402
TOTAL PROPERTY, PLANT, AND EQUIPMENT	22,370,085	21,489,289
Less - accumulated depreciation and amortization	8,787,797	8,703,047
PROPERTY, PLANT, AND EQUIPMENT - NET	13,582,288	12,786,242
Regulatory assets:
Other regulatory assets	1,096,597	1,145,842
Deferred Fuel Cost Non Current	168,122	168,122
Other	27,124	18,310
Deferred Costs and Other Assets	1,291,843	1,332,274
TOTAL ASSETS	19,569,539	18,448,864
CURRENT LIABILITIES
Currently maturing long-term debt	3	675,002
Short-term borrowings	0	43,540
Associated companies accounts payable	83,469	126,685
Accounts payable	337,473	404,374
Customer deposits	155,263	150,623
Taxes Payable, Current	0	18,157
Interest accrued	77,910	75,528
Deferred fuel costs	45,666	71,447
Current portion of regulatory liability for income taxes - net related to unprotected ADIT	157,173	0
Other	60,072	79,037
TOTAL	917,029	1,644,393
NON-CURRENT LIABILITIES
Deferred Income Tax Liabilities, Net	2,244,767	2,050,371
Accumulated deferred investment tax credits	118,217	121,870
Regulatory liability for income taxes - net	470,300	725,368
Other regulatory liabilities	829,011	761,059
Decommissioning and asset retirement cost liabilities	1,272,795	1,140,461
Loss Contingency Accrual	310,248	302,448
Pension and other postretirement liabilities	688,498	748,384
Long-term debt	6,761,120	5,469,069
Deferred Credits and Other Liabilities	195,776	176,637
TOTAL	12,890,732	11,495,667
Common Shareholders' Equity:
Accumulated other comprehensive loss	(57,951)	(46,400)
Members' Equity	5,819,729	5,355,204
TOTAL	5,761,778	5,308,804	5,394,588	5,081,809
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	19,569,539	18,448,864
Entergy Mississippi [Member]
Cash and cash equivalents:
Cash	38	1,607
Temporary cash investments	7	4,489
Total cash and cash equivalents	45	6,096	49	76,834
Accounts receivable:
Customer	102,986	72,039
Allowance for doubtful accounts	(830)	(574)
Associated companies	54,578	45,081
Other	16,294	9,738
Accrued unbilled revenues	55,335	54,256
Total accounts receivable	228,363	180,540
Deferred fuel costs	22,618	32,444
Fuel inventory - at average cost	11,901	45,606
Public Utilities, Inventory	46,041	42,571
Prepaid Expense and Other Assets, Current	10,674	7,041
TOTAL	319,642	314,298
OTHER PROPERTY AND INVESTMENTS
Non-utility property - at cost (less accumulated depreciation)	4,580	4,592
Escrow accounts	32,284	31,969
TOTAL	36,864	36,561
PROPERTY, PLANT, AND EQUIPMENT
Electric	4,624,415	4,660,297
Property under capital lease	0	125
Construction work in progress	181,766	149,367
TOTAL PROPERTY, PLANT, AND EQUIPMENT	4,806,181	4,809,789
Less - accumulated depreciation and amortization	1,652,552	1,681,306
PROPERTY, PLANT, AND EQUIPMENT - NET	3,153,629	3,128,483
Regulatory assets:
Other regulatory assets	371,849	397,909
Other	4,859	2,124
Deferred Costs and Other Assets	376,708	400,033
TOTAL ASSETS	3,886,843	3,879,375
CURRENT LIABILITIES
Currently maturing long-term debt	150,000	0
Associated companies accounts payable	67,933	55,689
Accounts payable	80,909	77,326
Customer deposits	84,260	83,654
Taxes Payable, Current	58,563	82,843
Interest accrued	18,134	22,901
Current portion of regulatory liability for income taxes - net related to unprotected ADIT	9,262	0
Other	10,169	12,785
TOTAL	479,230	335,198
NON-CURRENT LIABILITIES
Deferred Income Tax Liabilities, Net	533,861	488,806
Accumulated deferred investment tax credits	8,747	8,867
Regulatory liability for income taxes - net	239,118	411,011
Decommissioning and asset retirement cost liabilities	9,977	9,219
Loss Contingency Accrual	52,658	44,764
Pension and other postretirement liabilities	85,509	101,498
Long-term debt	1,120,830	1,270,122
Deferred Credits and Other Liabilities	47,559	11,639
TOTAL	2,098,259	2,345,926
Subsidiaries' preferred stock without sinking fund	20,381	20,381
Common Shareholders' Equity:
Common stock	199,326	199,326
Additional Paid in Capital, Common Stock	167	167
Retained earnings	1,089,480	978,377
TOTAL	1,288,973	1,177,870	1,175,582	1,094,791
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	3,886,843	3,879,375
Entergy New Orleans [Member]
Cash and cash equivalents:
Cash	26	30
Temporary cash investments	32,894	32,711
Total cash and cash equivalents	32,920	32,741	28,882	103,068
Securitization recovery trust account	5,570	1,455
Accounts receivable:
Customer	61,107	51,006
Allowance for doubtful accounts	(3,135)	(3,057)
Associated companies	17,464	22,976
Other	5,986	6,471
Accrued unbilled revenues	21,315	20,638
Total accounts receivable	102,737	98,034
Fuel inventory - at average cost	1,395	1,890
Public Utilities, Inventory	12,944	10,381
Prepaid Expense and Other Assets, Current	11,160	8,030
Prepaid Taxes	35,222	26,479
TOTAL	201,948	179,010
OTHER PROPERTY AND INVESTMENTS
Non-utility property - at cost (less accumulated depreciation)	1,016	1,016
Storm Reserve Escrow Account	80,448	79,546
Other	0	2,373
TOTAL	81,464	82,935
PROPERTY, PLANT, AND EQUIPMENT
Electric	1,334,227	1,302,235
Natural gas	279,689	261,263
Construction work in progress	139,839	46,993
TOTAL PROPERTY, PLANT, AND EQUIPMENT	1,753,755	1,610,491
Less - accumulated depreciation and amortization	659,315	631,178
PROPERTY, PLANT, AND EQUIPMENT - NET	1,094,440	979,313
Regulatory assets:
Other regulatory assets	232,365	251,433
Deferred Fuel Cost Non Current	4,080	4,080
Other	1,471	1,065
Deferred Costs and Other Assets	237,916	256,578
TOTAL ASSETS	1,615,768	1,497,836
CURRENT LIABILITIES
Notes Payable, Related Parties, Current	2,077	2,077
Associated companies accounts payable	35,094	47,472
Accounts payable	67,197	29,777
Customer deposits	28,617	28,442
Interest accrued	6,051	5,487
Deferred fuel costs	7,715	7,774
Current portion of regulatory liability for income taxes - net related to unprotected ADIT	26,200	0
Other	7,459	7,351
TOTAL	180,410	128,380
NON-CURRENT LIABILITIES
Deferred Income Tax Liabilities, Net	310,767	283,302
Accumulated deferred investment tax credits	2,242	2,323
Regulatory liability for income taxes - net	78,164	119,259
Decommissioning and asset retirement cost liabilities	3,236	3,076
Loss Contingency Accrual	85,500	85,083
Pension and other postretirement liabilities	7,774	20,755
Long-term debt	473,147	418,447
Deferred Credits and Other Liabilities	15,826	5,317
TOTAL	993,002	953,908
Common Shareholders' Equity:
Common stock	442,356	415,548
TOTAL	442,356	415,548	434,511	426,946
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	1,615,768	1,497,836
Notes Payable, Related Parties, Noncurrent	16,346	16,346
Entergy Texas [Member]
Cash and cash equivalents:
Cash	1,541	32
Temporary cash investments	18,956	115,481
Total cash and cash equivalents	20,497	115,513	1,502	6,181
Securitization recovery trust account	33,675	37,683
Accounts receivable:
Customer	105,040	74,382
Allowance for doubtful accounts	(570)	(463)
Associated companies	51,624	90,629
Other	9,560	9,831
Accrued unbilled revenues	56,008	50,682
Total accounts receivable	221,662	225,061
Fuel inventory - at average cost	41,686	42,731
Public Utilities, Inventory	40,083	38,605
Prepaid Expense and Other Assets, Current	19,968	19,710
TOTAL	377,571	479,303
OTHER PROPERTY AND INVESTMENTS
Investment in affiliates - at equity	458	457
Non-utility property - at cost (less accumulated depreciation)	376	376
Other	18,999	19,235
TOTAL	19,833	20,068
PROPERTY, PLANT, AND EQUIPMENT
Electric	4,693,662	4,569,295
Construction work in progress	223,279	102,088
TOTAL PROPERTY, PLANT, AND EQUIPMENT	4,916,941	4,671,383
Less - accumulated depreciation and amortization	1,650,889	1,579,387
PROPERTY, PLANT, AND EQUIPMENT - NET	3,266,052	3,091,996
Regulatory assets:
Other regulatory assets	597,087	661,398
Other	32,118	26,973
Deferred Costs and Other Assets	629,205	688,371
TOTAL ASSETS	4,292,661	4,279,738
CURRENT LIABILITIES
Currently maturing long-term debt	500,000	0
Associated companies accounts payable	42,825	59,347
Accounts payable	106,968	126,095
Customer deposits	41,875	40,925
Taxes Payable, Current	70,135	45,659
Interest accrued	19,472	25,556
Deferred fuel costs	33,567	67,301
Current portion of regulatory liability for income taxes - net related to unprotected ADIT	91,126	0
Other	9,792	8,132
TOTAL	915,760	373,015
NON-CURRENT LIABILITIES
Deferred Income Tax Liabilities, Net	548,173	544,642
Accumulated deferred investment tax credits	11,403	11,983
Regulatory liability for income taxes - net	320,640	412,620
Other regulatory liabilities	23,017	6,850
Decommissioning and asset retirement cost liabilities	7,123	6,835
Loss Contingency Accrual	11,121	10,115
Pension and other postretirement liabilities	0	17,853
Long-term debt	1,027,817	1,587,150
Deferred Credits and Other Liabilities	53,455	48,508
TOTAL	2,002,749	2,646,556
Common Shareholders' Equity:
Common stock	49,452	49,452
Additional Paid in Capital, Common Stock	596,994	596,994
Retained earnings	727,706	613,721
TOTAL	1,374,152	1,260,167	1,140,537	1,068,994
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	4,292,661	4,279,738
System Energy [Member]
Cash and cash equivalents:
Cash	153	78
Temporary cash investments	254,388	287,109
Total cash and cash equivalents	254,541	287,187	144,967	245,863
Accounts receivable:
Associated companies	55,727	170,149
Other	4,840	6,526
Total accounts receivable	60,567	176,675
Public Utilities, Inventory	93,074	88,424
Deferred nuclear refueling outage costs	53,174	7,908
Prepaid Expense and Other Assets, Current	5,099	2,489
TOTAL	466,455	562,683
OTHER PROPERTY AND INVESTMENTS
Decommissioning trust funds	952,413	905,686
TOTAL	952,413	905,686
PROPERTY, PLANT, AND EQUIPMENT
Electric	4,434,393	4,327,849
Property under capital lease	588,281	588,281
Construction work in progress	71,482	69,937
Nuclear fuel	259,450	207,513
TOTAL PROPERTY, PLANT, AND EQUIPMENT	5,353,606	5,193,580
Less - accumulated depreciation and amortization	3,191,434	3,175,018
PROPERTY, PLANT, AND EQUIPMENT - NET	2,162,172	2,018,562
Regulatory assets:
Other regulatory assets	449,100	444,327
Other	4,835	7,629
Deferred Costs and Other Assets	453,935	451,956
TOTAL ASSETS	4,034,975	3,938,887
CURRENT LIABILITIES
Currently maturing long-term debt	85,006	85,004
Short-term borrowings	0	17,830
Associated companies accounts payable	38,522	16,878
Accounts payable	62,015	62,868
Taxes Payable, Current	45,567	46,584
Interest accrued	15,700	13,389
Current portion of regulatory liability for income taxes - net related to unprotected ADIT	36,946	0
Other	2,436	2,434
TOTAL	286,192	244,987
NON-CURRENT LIABILITIES
Deferred Income Tax Liabilities, Net	795,150	776,420
Accumulated deferred investment tax credits	38,447	39,406
Regulatory liability for income taxes - net	161,126	246,122
Other regulatory liabilities	467,922	455,991
Decommissioning and asset retirement cost liabilities	887,288	861,664
Pension and other postretirement liabilities	110,245	121,874
Long-term debt	554,449	466,484
Deferred Credits and Other Liabilities	19,160	15,130
TOTAL	3,033,787	2,983,091
Common Shareholders' Equity:
Common stock	601,850	658,350
Retained earnings	113,146	52,459
TOTAL	714,996	710,809	$ 713,493	$ 738,823
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 4,034,975	$ 3,938,887