Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Dec. 31, 2017
Cash and cash equivalents:
Cash	$ 70,395	$ 56,690
Temporary cash investments	885,436	424,285
Total cash and cash equivalents	955,831	480,975	$ 987,981	$ 781,273
Securitization recovery trust account	55,000	51,000
Accounts receivable:
Customer	732,763	558,494
Allowance for doubtful accounts	(7,987)	(7,322)
Other	132,547	167,722
Accrued unbilled revenues	481,048	395,511
Total accounts receivable	1,338,371	1,114,405
Deferred fuel costs	0	27,251
Fuel inventory - at average cost	131,703	117,304
Public Utilities, Inventory	803,843	752,843
Deferred nuclear refueling outage costs	173,229	230,960
Prepaid Expense and Other Assets, Current	258,695	234,326
TOTAL	3,661,672	2,958,064
OTHER PROPERTY AND INVESTMENTS
Decommissioning trust funds	6,128,647	6,920,164
Non-utility property - at cost (less accumulated depreciation)	326,704	304,382
Other	448,140	437,265
TOTAL	6,903,491	7,661,811
PROPERTY, PLANT, AND EQUIPMENT
Electric	52,705,142	49,831,486
Natural gas	533,217	496,150
Construction work in progress	2,871,054	2,888,639
Nuclear fuel	707,198	861,272
TOTAL PROPERTY, PLANT, AND EQUIPMENT	56,816,611	54,077,547
Less - accumulated depreciation and amortization	22,695,886	22,103,101
PROPERTY, PLANT, AND EQUIPMENT - NET	34,120,725	31,974,446
Regulatory assets:
Other regulatory assets	4,839,357	4,746,496
Deferred Fuel Cost Non Current	239,793	239,496
Goodwill	377,172	377,172
Deferred Income Tax Assets, Net	67,438	54,593
Other	296,620	262,988
Deferred Costs and Other Assets	5,820,380	5,680,745
TOTAL ASSETS	50,506,268	48,275,066
CURRENT LIABILITIES
Currently maturing long-term debt	520,012	650,009
Short-term borrowings	1,917,788	1,942,339
Accounts payable	1,328,631	1,496,058
Customer deposits	409,090	411,505
Taxes Payable, Current	251,821	254,241
Interest accrued	190,877	193,192
Deferred fuel costs	115,761	52,396
Pension and other postretirement liabilities	57,374	61,240
Current portion of regulatory liability for income taxes - net related to unprotected ADIT	117,575	248,127
Other	194,117	134,437
TOTAL	5,103,046	5,443,544
NON-CURRENT LIABILITIES
Deferred Income Tax Liabilities, Net	4,552,456	4,107,152
Accumulated deferred investment tax credits	206,837	213,101
Regulatory liability for income taxes - net	1,677,707	1,817,021
Other regulatory liabilities	1,871,005	1,620,254
Decommissioning and asset retirement cost liabilities	6,068,323	6,355,543
Loss Contingency Accrual	528,172	514,107
Pension and other postretirement liabilities	2,487,906	2,616,085
Long-term debt	16,938,014	15,518,303
Deferred Credits and Other Liabilities	783,330	1,006,249
TOTAL	35,113,750	33,767,815
Subsidiaries' preferred stock without sinking fund	219,411	219,402
Common Shareholders' Equity:
Common Stock, Value, Issued	2,700	2,616
Additional Paid in Capital, Common Stock	6,553,009	5,951,431
Accumulated other comprehensive loss	(419,772)	(557,173)	(632,126)	(23,531)
Less - treasury stock, at cost	5,158,625	5,273,719
TOTAL	10,035,061	8,844,305
Stockholders' Equity Attributable to Noncontrolling Interest	35,000	0
Retained Earnings (Accumulated Deficit)	9,057,749	8,721,150
TOTAL	10,070,061	8,844,305	8,412,712	7,992,515
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	50,506,268	48,275,066
Entergy Arkansas [Member]
Cash and cash equivalents:
Cash	410	118
Temporary cash investments	76,659	1
Total cash and cash equivalents	77,069	119	221,782	6,216
Securitization recovery trust account	7,904	4,666
Accounts receivable:
Customer	160,955	94,348
Allowance for doubtful accounts	(1,423)	(1,264)
Associated companies	45,499	48,184
Other	48,569	64,393
Accrued unbilled revenues	137,444	108,092
Total accounts receivable	391,044	313,753
Deferred fuel costs	0	19,235
Fuel inventory - at average cost	28,498	23,148
Public Utilities, Inventory	207,541	196,314
Deferred nuclear refueling outage costs	33,581	78,966
Prepaid Expense and Other Assets, Current	17,447	14,553
TOTAL	763,084	650,754
OTHER PROPERTY AND INVESTMENTS
Decommissioning trust funds	1,045,826	912,049
Other	5,476	5,480
TOTAL	1,051,302	917,529
PROPERTY, PLANT, AND EQUIPMENT
Electric	12,041,822	11,611,041
Construction work in progress	299,195	243,731
Nuclear fuel	186,731	220,602
TOTAL PROPERTY, PLANT, AND EQUIPMENT	12,527,748	12,075,374
Less - accumulated depreciation and amortization	4,985,276	4,864,818
PROPERTY, PLANT, AND EQUIPMENT - NET	7,542,472	7,210,556
Regulatory assets:
Other regulatory assets	1,590,726	1,534,977
Deferred Fuel Cost Non Current	67,591	67,294
Other	21,441	20,486
Deferred Costs and Other Assets	1,679,758	1,622,757
TOTAL ASSETS	11,036,616	10,401,596
CURRENT LIABILITIES
Associated companies accounts payable	55,971	251,768
Accounts payable	195,783	187,387
Customer deposits	101,349	99,053
Taxes Payable, Current	38,281	56,889
Interest accrued	39,099	18,893
Deferred fuel costs	33,530	0
Current portion of regulatory liability for income taxes - net related to unprotected ADIT	33,692	99,316
Other	48,516	23,943
TOTAL	546,221	737,249
NON-CURRENT LIABILITIES
Deferred Income Tax Liabilities, Net	1,172,542	1,085,545
Accumulated deferred investment tax credits	32,002	32,903
Regulatory liability for income taxes - net	480,573	505,748
Other regulatory liabilities	526,004	402,668
Decommissioning and asset retirement cost liabilities	1,224,936	1,048,428
Loss Contingency Accrual	57,820	48,979
Pension and other postretirement liabilities	287,086	313,295
Long-term debt	3,538,384	3,225,759
Deferred Credits and Other Liabilities	63,809	17,919
TOTAL	7,383,156	6,681,244
Common Shareholders' Equity:
Members' Equity	3,107,239	2,983,103
TOTAL	3,107,239	2,983,103	2,973,384	2,376,754
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	11,036,616	10,401,596
Entergy Louisiana [Member]
Cash and cash equivalents:
Cash	224	252
Temporary cash investments	127,821	43,112
Total cash and cash equivalents	128,045	43,364	213,585	35,907
Securitization recovery trust account	10,100	3,600
Accounts receivable:
Customer	258,090	199,903
Allowance for doubtful accounts	(2,154)	(1,813)
Associated companies	81,906	123,363
Other	46,282	60,879
Accrued unbilled revenues	194,753	167,052
Total accounts receivable	578,877	549,384
Fuel inventory - at average cost	36,170	34,418
Public Utilities, Inventory	344,207	324,627
Deferred nuclear refueling outage costs	70,456	24,406
Prepaid Expense and Other Assets, Current	47,519	38,715
TOTAL	1,205,274	1,014,914
Investments in and Advances to Affiliates, at Fair Value	1,390,587	1,390,587
OTHER PROPERTY AND INVESTMENTS
Decommissioning trust funds	1,485,569	1,284,996
Non-utility property - at cost (less accumulated depreciation)	308,095	286,555
Storm Reserve Escrow Account	294,538	289,525
Other	13,923	14,927
TOTAL	3,492,712	3,266,590
PROPERTY, PLANT, AND EQUIPMENT
Electric	22,283,456	20,532,312
Natural gas	230,416	211,421
Construction work in progress	1,325,784	1,864,582
Nuclear fuel	291,404	298,022
TOTAL PROPERTY, PLANT, AND EQUIPMENT	24,131,060	22,906,337
Less - accumulated depreciation and amortization	9,018,154	8,837,596
PROPERTY, PLANT, AND EQUIPMENT - NET	15,112,906	14,068,741
Regulatory assets:
Other regulatory assets	1,208,712	1,105,077
Deferred Fuel Cost Non Current	168,122	168,122
Other	27,297	28,371
Deferred Costs and Other Assets	1,404,131	1,301,570
TOTAL ASSETS	21,215,023	19,651,815
CURRENT LIABILITIES
Currently maturing long-term debt	70,002	2
Associated companies accounts payable	86,781	102,749
Accounts payable	338,724	390,367
Customer deposits	152,627	155,314
Taxes Payable, Current	109,778	30,868
Interest accrued	88,552	83,450
Deferred fuel costs	19,952	31,411
Current portion of regulatory liability for income taxes - net related to unprotected ADIT	33,231	31,457
Other	71,608	49,202
TOTAL	971,255	874,820
NON-CURRENT LIABILITIES
Deferred Income Tax Liabilities, Net	2,414,508	2,226,721
Accumulated deferred investment tax credits	113,346	116,999
Regulatory liability for income taxes - net	523,697	581,001
Other regulatory liabilities	778,199	748,784
Decommissioning and asset retirement cost liabilities	1,478,951	1,280,272
Loss Contingency Accrual	320,503	310,755
Pension and other postretirement liabilities	627,155	643,171
Long-term debt	7,274,158	6,805,766
Deferred Credits and Other Liabilities	402,296	160,608
TOTAL	13,932,813	12,874,077
Common Shareholders' Equity:
Accumulated other comprehensive loss	(9,060)	(6,153)
Members' Equity	6,320,015	5,909,071
TOTAL	6,310,955	5,902,918	5,761,778	5,308,804
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	21,215,023	19,651,815
Entergy Mississippi [Member]
Cash and cash equivalents:
Cash	11	11
Temporary cash investments	98,925	36,943
Total cash and cash equivalents	98,936	36,954	45	6,096
Accounts receivable:
Customer	98,245	73,205
Allowance for doubtful accounts	(615)	(563)
Associated companies	19,217	51,065
Other	10,173	8,647
Accrued unbilled revenues	60,867	50,171
Total accounts receivable	187,887	182,525
Deferred fuel costs	0	8,016
Fuel inventory - at average cost	15,803	11,931
Public Utilities, Inventory	51,049	47,255
Prepaid Expense and Other Assets, Current	8,694	9,365
TOTAL	362,369	296,046
OTHER PROPERTY AND INVESTMENTS
Non-utility property - at cost (less accumulated depreciation)	4,564	4,576
Escrow accounts	32,953	32,447
TOTAL	37,517	37,023
PROPERTY, PLANT, AND EQUIPMENT
Electric	4,981,082	4,780,720
Construction work in progress	177,221	128,149
TOTAL PROPERTY, PLANT, AND EQUIPMENT	5,158,303	4,908,869
Less - accumulated depreciation and amortization	1,681,597	1,641,821
PROPERTY, PLANT, AND EQUIPMENT - NET	3,476,706	3,267,048
Regulatory assets:
Other regulatory assets	343,972	343,049
Other	12,161	3,638
Deferred Costs and Other Assets	356,133	346,687
TOTAL ASSETS	4,232,725	3,946,804
CURRENT LIABILITIES
Currently maturing long-term debt	0	150,000
Associated companies accounts payable	41,323	42,928
Accounts payable	81,260	79,117
Customer deposits	86,295	85,085
Taxes Payable, Current	50,996	77,552
Interest accrued	22,324	20,231
Deferred fuel costs	39,553	0
Other	17,717	7,526
TOTAL	339,468	462,439
NON-CURRENT LIABILITIES
Deferred Income Tax Liabilities, Net	591,105	551,869
Accumulated deferred investment tax credits	10,066	10,186
Regulatory liability for income taxes - net	239,630	246,402
Other regulatory liabilities	23,779	33,622
Decommissioning and asset retirement cost liabilities	9,594	9,206
Loss Contingency Accrual	48,043	51,142
Pension and other postretirement liabilities	86,036	93,100
Long-term debt	1,469,454	1,175,750
Deferred Credits and Other Liabilities	25,022	20,862
TOTAL	2,502,729	2,192,139
Common Shareholders' Equity:
Members' Equity	1,390,528	1,292,226
TOTAL	1,390,528	1,292,226	1,288,973	1,177,870
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	4,232,725	3,946,804
Entergy New Orleans [Member]
Cash and cash equivalents:
Cash	26	26
Temporary cash investments	0	19,651
Total cash and cash equivalents	26	19,677	32,920	32,741
Securitization recovery trust account	5,268	2,224
Accounts receivable:
Customer	57,173	43,890
Allowance for doubtful accounts	(3,116)	(3,222)
Associated companies	2,541	27,938
Other	4,954	4,090
Accrued unbilled revenues	22,776	18,907
Total accounts receivable	84,328	91,603
Fuel inventory - at average cost	1,907	1,533
Public Utilities, Inventory	12,865	12,133
Prepaid Expense and Other Assets, Current	10,655	6,905
TOTAL	115,049	134,075
OTHER PROPERTY AND INVESTMENTS
Non-utility property - at cost (less accumulated depreciation)	1,016	1,016
Storm Reserve Escrow Account	82,236	80,853
TOTAL	83,252	81,869
PROPERTY, PLANT, AND EQUIPMENT
Electric	1,430,352	1,364,091
Natural gas	302,801	284,728
Construction work in progress	196,842	146,668
TOTAL PROPERTY, PLANT, AND EQUIPMENT	1,929,995	1,795,487
Less - accumulated depreciation and amortization	699,525	670,135
PROPERTY, PLANT, AND EQUIPMENT - NET	1,230,470	1,125,352
Regulatory assets:
Other regulatory assets	244,231	229,796
Deferred Fuel Cost Non Current	4,080	4,080
Other	1,749	1,416
Deferred Costs and Other Assets	250,060	235,292
TOTAL ASSETS	1,678,831	1,576,588
CURRENT LIABILITIES
Notes Payable, Related Parties, Current	1,979	1,979
Associated companies accounts payable	85,485	43,416
Accounts payable	37,394	36,686
Customer deposits	28,515	28,667
Taxes Payable, Current	4,310	4,068
Interest accrued	6,380	6,366
Deferred fuel costs	9,616	1,288
Current portion of regulatory liability for income taxes - net related to unprotected ADIT	15,439	25,301
Other	7,182	9,521
TOTAL	196,300	157,292
NON-CURRENT LIABILITIES
Deferred Income Tax Liabilities, Net	349,600	323,595
Accumulated deferred investment tax credits	2,153	2,219
Regulatory liability for income taxes - net	52,705	60,249
Decommissioning and asset retirement cost liabilities	3,463	3,291
Loss Contingency Accrual	88,017	86,594
Long-term debt	462,273	467,358
Notes Payable, Related Parties, Noncurrent	14,367	14,367
Deferred Credits and Other Liabilities	18,069	16,673
TOTAL	990,647	974,346
Common Shareholders' Equity:
Members' Equity	491,884	444,950
TOTAL	491,884	444,950	442,356	415,548
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	1,678,831	1,576,588
Entergy Texas [Member]
Cash and cash equivalents:
Cash	25	26
Temporary cash investments	92,253	30
Total cash and cash equivalents	92,278	56	20,497	115,513
Securitization recovery trust account	31,649	40,185
Accounts receivable:
Customer	88,557	69,714
Allowance for doubtful accounts	(680)	(461)
Associated companies	24,124	64,441
Other	6,770	12,275
Accrued unbilled revenues	65,207	51,288
Total accounts receivable	183,978	197,257
Fuel inventory - at average cost	44,143	42,667
Public Utilities, Inventory	43,774	41,883
Prepaid Expense and Other Assets, Current	22,266	15,903
TOTAL	418,088	337,951
OTHER PROPERTY AND INVESTMENTS
Investment in affiliates - at equity	413	448
Non-utility property - at cost (less accumulated depreciation)	376	376
Other	19,863	19,218
TOTAL	20,652	20,042
PROPERTY, PLANT, AND EQUIPMENT
Electric	5,028,850	4,773,984
Construction work in progress	663,465	325,193
TOTAL PROPERTY, PLANT, AND EQUIPMENT	5,692,315	5,099,177
Less - accumulated depreciation and amortization	1,745,046	1,684,569
PROPERTY, PLANT, AND EQUIPMENT - NET	3,947,269	3,414,608
Regulatory assets:
Other regulatory assets	534,255	598,048
Other	32,861	29,371
Deferred Costs and Other Assets	567,116	627,419
TOTAL ASSETS	4,953,125	4,400,020
CURRENT LIABILITIES
Currently maturing long-term debt	0	500,000
Associated companies accounts payable	45,090	119,371
Accounts payable	169,788	150,679
Customer deposits	40,304	43,387
Taxes Payable, Current	57,058	53,513
Interest accrued	12,877	24,355
Deferred fuel costs	13,109	19,697
Current portion of regulatory liability for income taxes - net related to unprotected ADIT	35,213	87,627
Other	8,786	6,353
TOTAL	382,225	1,004,982
NON-CURRENT LIABILITIES
Deferred Income Tax Liabilities, Net	581,310	552,535
Accumulated deferred investment tax credits	10,713	11,176
Regulatory liability for income taxes - net	236,463	264,623
Other regulatory liabilities	44,784	47,884
Decommissioning and asset retirement cost liabilities	7,526	7,222
Loss Contingency Accrual	10,386	13,856
Long-term debt	1,938,303	1,013,735
Deferred Credits and Other Liabilities	64,635	61,605
TOTAL	2,894,120	1,972,636
Common Shareholders' Equity:
Common Stock, Value, Issued	49,452	49,452
Additional Paid in Capital, Common Stock	682,980	596,994
TOTAL	1,641,780	1,422,402
Stockholders' Equity Attributable to Noncontrolling Interest	35,000	0
Retained Earnings (Accumulated Deficit)	909,348	775,956
TOTAL	1,676,780	1,422,402	1,374,152	1,260,167
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	4,953,125	4,400,020
System Energy [Member]
Cash and cash equivalents:
Cash	79	68
Temporary cash investments	164,246	95,617
Total cash and cash equivalents	164,325	95,685	254,541	287,187
Accounts receivable:
Associated companies	62,740	148,571
Other	6,330	5,390
Total accounts receivable	69,070	153,961
Public Utilities, Inventory	111,927	97,225
Deferred nuclear refueling outage costs	20,253	44,424
Prepaid Expense and Other Assets, Current	9,040	2,985
Prepaid Taxes	0	5,415
TOTAL	374,615	399,695
OTHER PROPERTY AND INVESTMENTS
Decommissioning trust funds	1,002,261	869,543
TOTAL	1,002,261	869,543
PROPERTY, PLANT, AND EQUIPMENT
Electric	5,036,030	5,036,116
Construction work in progress	141,858	70,156
Nuclear fuel	158,745	234,889
TOTAL PROPERTY, PLANT, AND EQUIPMENT	5,336,633	5,341,161
Less - accumulated depreciation and amortization	3,273,504	3,212,080
PROPERTY, PLANT, AND EQUIPMENT - NET	2,063,129	2,129,081
Regulatory assets:
Other regulatory assets	455,492	446,371
Other	3,759	4,124
Deferred Costs and Other Assets	459,251	450,495
TOTAL ASSETS	3,899,256	3,848,814
CURRENT LIABILITIES
Currently maturing long-term debt	10	6
Associated companies accounts payable	11,475	11,031
Accounts payable	61,391	47,565
Taxes Payable, Current	9,164	0
Interest accrued	11,817	13,295
Current portion of regulatory liability for income taxes - net related to unprotected ADIT	0	4,426
Other	2,829	2,832
TOTAL	96,686	79,155
NON-CURRENT LIABILITIES
Deferred Income Tax Liabilities, Net	811,875	805,296
Accumulated deferred investment tax credits	37,714	38,673
Regulatory liability for income taxes - net	144,639	158,998
Other regulatory liabilities	490,790	381,887
Decommissioning and asset retirement cost liabilities	922,663	896,000
Pension and other postretirement liabilities	93,626	98,639
Long-term debt	569,991	630,744
Deferred Credits and Other Liabilities	31,493	22,224
TOTAL	3,102,791	3,032,461
Common Shareholders' Equity:
Common Stock, Value, Issued	601,850	601,850
Retained Earnings (Accumulated Deficit)	97,929	135,348
TOTAL	699,779	737,198	$ 714,996	$ 710,809
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 3,899,256	$ 3,848,814