Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash and cash equivalents:
Cash	$ 34,242	$ 56,690
Temporary cash investments	391,480	424,285
Total cash and cash equivalents	425,722	480,975	$ 781,273	$ 1,187,844
Accounts receivable:
Customer	595,509	558,494
Allowance for doubtful accounts	(7,404)	(7,322)
Other	219,870	167,722
Accrued unbilled revenues	400,617	395,511
Total accounts receivable	1,208,592	1,114,405
Deferred fuel costs	0	27,251
Fuel inventory - at average cost	145,476	117,304
Public Utilities, Inventory	824,989	752,843
Deferred nuclear refueling outage costs	157,568	230,960
Prepayments and other	283,645	234,326
TOTAL	3,045,992	2,958,064
OTHER PROPERTY AND INVESTMENTS
Decommissioning trust funds	6,404,030	6,920,164
Non-utility property - at cost (less accumulated depreciation)	332,864	304,382
Other	496,452	437,265
TOTAL	7,233,346	7,661,811
PROPERTY, PLANT, AND EQUIPMENT
Electric	54,271,467	49,831,486
Natural gas	547,110	496,150
Construction work in progress	2,823,291	2,888,639
Nuclear fuel	677,181	861,272
TOTAL PROPERTY, PLANT, AND EQUIPMENT	58,319,049	54,077,547
Less - accumulated depreciation and amortization	23,136,356	22,103,101
PROPERTY, PLANT, AND EQUIPMENT - NET	35,182,693	31,974,446
Regulatory assets:
Regulatory Assets, Noncurrent	5,292,055	4,746,496
Deferred Fuel Cost Non Current	239,892	239,496
Goodwill	377,172	377,172
Deferred Income Tax Assets, Net	64,461	54,593
Other	288,301	262,988
Deferred Costs and Other Assets	6,261,881	5,680,745
TOTAL ASSETS	51,723,912	48,275,066
CURRENT LIABILITIES
Currently maturing long-term debt	795,012	650,009
Short-term borrowings	1,946,727	1,942,339
Accounts payable	1,499,861	1,496,058
Customer deposits	409,171	411,505
Taxes accrued	233,455	254,241
Interest accrued	194,129	193,192
Deferred fuel costs	197,687	52,396
Pension and other postretirement liabilities	66,184	61,240
Current portion of regulatory liability for income taxes - net related to unprotected ADIT	76,457	248,127
Other	201,780	134,437
TOTAL	5,620,463	5,443,544
NON-CURRENT LIABILITIES
Deferred Income Tax Liabilities, Net	4,401,190	4,107,152
Accumulated deferred investment tax credits	207,113	213,101
Regulatory liability for income taxes - net	1,633,159	1,817,021
Other regulatory liabilities	1,961,005	1,620,254
Decommissioning trust fund	6,159,212	6,355,543
Loss Contingency Accrual	534,028	514,107
Pension and other postretirement liabilities	2,798,265	2,616,085
Long-term debt	17,078,643	15,518,303
Deferred Credits and Other Liabilities	852,749	1,006,249
TOTAL	35,625,364	33,767,815
Commitments and Contingencies
Subsidiaries’ preferred stock without sinking fund	219,410	219,402
EQUITY
Common stock	2,700	2,616
Additional Paid in Capital, Common Stock	6,564,436	5,951,431
Retained Earnings (Accumulated Deficit)	9,257,609	8,721,150
Accumulated other comprehensive loss	(446,920)	(557,173)	(23,531)
Less - treasury stock, at cost (76,681,936 shares in 2013 and 76,945,239 shares in 2012)	5,154,150	5,273,719
Total common shareholders' equity	10,223,675	8,844,305	7,992,515	8,081,809
Total common shareholders' equity	10,258,675	8,844,305
Stockholders' Equity Attributable to Noncontrolling Interest	35,000	0
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	51,723,912	48,275,066
Entergy New Orleans [Member]
Cash and cash equivalents:
Cash	26	26
Temporary cash investments	5,991	19,651
Total cash and cash equivalents	6,017	19,677	32,741	103,068
Restricted Investments, Current	1,989	2,224
Accounts receivable:
Customer	48,265	43,890
Allowance for doubtful accounts	(3,226)	(3,222)
Associated companies	6,280	27,938
Other	7,378	4,090
Accrued unbilled revenues	25,453	18,907
Total accounts receivable	84,150	91,603
Fuel inventory - at average cost	1,920	1,533
Public Utilities, Inventory	13,522	12,133
Prepayments and other	4,846	6,905
TOTAL	112,444	134,075
OTHER PROPERTY AND INVESTMENTS
Non-utility property - at cost (less accumulated depreciation)	1,016	1,016
Storm reserve escrow account	82,605	80,853
TOTAL	83,621	81,869
PROPERTY, PLANT, AND EQUIPMENT
Electric	1,467,215	1,364,091
Natural gas	311,432	284,728
Construction work in progress	201,829	146,668
TOTAL PROPERTY, PLANT, AND EQUIPMENT	1,980,476	1,795,487
Less - accumulated depreciation and amortization	715,406	670,135
PROPERTY, PLANT, AND EQUIPMENT - NET	1,265,070	1,125,352
Regulatory assets:
Regulatory Assets, Noncurrent	259,363	229,796
Deferred Fuel Cost Non Current	4,080	4,080
Other	10,720	1,416
Deferred Costs and Other Assets	274,163	235,292
TOTAL ASSETS	1,735,298	1,576,588
CURRENT LIABILITIES
Currently maturing long-term debt	25,000	0
Notes Payable, Related Parties, Current	1,838	1,979
Associated companies accounts payable	43,222	43,416
Accounts payable	43,963	36,686
Customer deposits	28,493	28,667
Taxes accrued	4,302	4,068
Interest accrued	6,916	6,366
Deferred fuel costs	4,918	1,288
Current portion of regulatory liability for income taxes - net related to unprotected ADIT	9,470	25,301
Other	15,827	9,521
TOTAL	183,949	157,292
NON-CURRENT LIABILITIES
Deferred Income Tax Liabilities, Net	354,536	323,595
Accumulated deferred investment tax credits	2,131	2,219
Regulatory liability for income taxes - net	49,090	60,249
Decommissioning trust fund	3,522	3,291
Loss Contingency Accrual	88,542	86,594
Long-term debt	521,539	467,358
Notes Payable, Related Parties, Noncurrent	12,529	14,367
Deferred Credits and Other Liabilities	21,881	16,673
TOTAL	1,053,770	974,346
Commitments and Contingencies
EQUITY
Members' Equity	497,579	444,950
Total common shareholders' equity	497,579	444,950	415,548	426,946
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	1,735,298	1,576,588
Entergy Louisiana [Member]
Cash and cash equivalents:
Cash	488	252
Temporary cash investments	1,518	43,112
Total cash and cash equivalents	2,006	43,364	35,907	213,850
Accounts receivable:
Customer	194,869	199,903
Allowance for doubtful accounts	(1,902)	(1,813)
Associated companies	77,212	123,363
Other	42,179	60,879
Accrued unbilled revenues	169,201	167,052
Total accounts receivable	481,559	549,384
Fuel inventory - at average cost	41,613	34,418
Public Utilities, Inventory	354,020	324,627
Deferred nuclear refueling outage costs	56,743	24,406
Prepaid taxes	7,959	0
Prepayments and other	37,837	38,715
TOTAL	981,737	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	1,563,812	1,284,996
Non-utility property - at cost (less accumulated depreciation)	312,896	286,555
Storm reserve escrow account	295,875	289,525
Other	13,476	14,927
TOTAL	3,576,646	3,266,590
PROPERTY, PLANT, AND EQUIPMENT
Electric	22,620,365	20,532,312
Natural gas	235,678	211,421
Construction work in progress	1,383,603	1,864,582
Nuclear fuel	267,779	298,022
TOTAL PROPERTY, PLANT, AND EQUIPMENT	24,507,425	22,906,337
Less - accumulated depreciation and amortization	9,118,524	8,837,596
PROPERTY, PLANT, AND EQUIPMENT - NET	15,388,901	14,068,741
Regulatory assets:
Regulatory Assets, Noncurrent	1,315,211	1,105,077
Deferred Fuel Cost Non Current	168,122	168,122
Other	33,491	28,371
Deferred Costs and Other Assets	1,516,824	1,301,570
TOTAL ASSETS	21,464,108	19,651,815
CURRENT LIABILITIES
Currently maturing long-term debt	320,002	2
Associated companies accounts payable	187,615	102,749
Accounts payable	357,206	390,367
Customer deposits	153,097	155,314
Taxes accrued	0	30,868
Interest accrued	87,744	83,450
Deferred fuel costs	55,645	31,411
Current portion of regulatory liability for income taxes - net related to unprotected ADIT	31,138	31,457
Other	64,668	49,202
TOTAL	1,257,115	874,820
NON-CURRENT LIABILITIES
Deferred Income Tax Liabilities, Net	2,464,513	2,226,721
Accumulated deferred investment tax credits	112,128	116,999
Regulatory liability for income taxes - net	500,083	581,001
Other regulatory liabilities	794,140	748,784
Decommissioning trust fund	1,497,349	1,280,272
Loss Contingency Accrual	320,419	310,755
Pension and other postretirement liabilities	677,619	643,171
Long-term debt	6,983,667	6,805,766
Deferred Credits and Other Liabilities	459,957	160,608
TOTAL	13,809,875	12,874,077
Commitments and Contingencies
EQUITY
Accumulated other comprehensive loss	4,562	(6,153)
Members' Equity	6,392,556	5,909,071
Total common shareholders' equity	6,397,118	5,902,918	5,308,804	5,081,809
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	21,464,108	19,651,815
Entergy Arkansas [Member]
Cash and cash equivalents:
Cash	3,519	118
Temporary cash investments	0	1
Total cash and cash equivalents	3,519	119	6,216	20,509
Restricted Investments, Current	4,036	4,666
Accounts receivable:
Customer	117,679	94,348
Allowance for doubtful accounts	(1,169)	(1,264)
Associated companies	29,178	48,184
Other	117,653	64,393
Accrued unbilled revenues	108,489	108,092
Total accounts receivable	371,830	313,753
Deferred fuel costs	0	19,235
Fuel inventory - at average cost	33,745	23,148
Public Utilities, Inventory	211,320	196,314
Deferred nuclear refueling outage costs	48,875	78,966
Prepayments and other	14,096	14,553
TOTAL	687,421	650,754
OTHER PROPERTY AND INVESTMENTS
Decommissioning trust funds	1,101,283	912,049
Other	345	5,480
TOTAL	1,101,628	917,529
PROPERTY, PLANT, AND EQUIPMENT
Electric	12,293,483	11,611,041
Construction work in progress	197,775	243,731
Nuclear fuel	195,547	220,602
TOTAL PROPERTY, PLANT, AND EQUIPMENT	12,686,805	12,075,374
Less - accumulated depreciation and amortization	5,019,826	4,864,818
PROPERTY, PLANT, AND EQUIPMENT - NET	7,666,979	7,210,556
Regulatory assets:
Regulatory Assets, Noncurrent	1,666,850	1,534,977
Deferred Fuel Cost Non Current	67,690	67,294
Other	15,065	20,486
Deferred Costs and Other Assets	1,749,605	1,622,757
TOTAL ASSETS	11,205,633	10,401,596
CURRENT LIABILITIES
Currently maturing long-term debt	0	0
Associated companies accounts payable	111,785	251,768
Accounts payable	202,201	187,387
Customer deposits	101,411	99,053
Taxes accrued	81,831	56,889
Interest accrued	22,788	18,893
Deferred fuel costs	53,721	0
Current portion of regulatory liability for income taxes - net related to unprotected ADIT	9,296	99,316
Other	38,760	23,943
TOTAL	621,793	737,249
NON-CURRENT LIABILITIES
Deferred Income Tax Liabilities, Net	1,183,126	1,085,545
Accumulated deferred investment tax credits	31,701	32,903
Regulatory liability for income taxes - net	478,174	505,748
Other regulatory liabilities	559,555	402,668
Decommissioning trust fund	1,242,616	1,048,428
Loss Contingency Accrual	63,880	48,979
Pension and other postretirement liabilities	319,075	313,295
Long-term debt	3,517,208	3,225,759
Deferred Credits and Other Liabilities	62,568	17,919
TOTAL	7,457,903	6,681,244
Commitments and Contingencies
EQUITY
Members' Equity	3,125,937	2,983,103
Total common shareholders' equity	3,125,937	2,983,103	2,376,754	2,253,317
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	11,205,633	10,401,596
Entergy Mississippi [Member]
Cash and cash equivalents:
Cash	11	11
Temporary cash investments	51,590	36,943
Total cash and cash equivalents	51,601	36,954	6,096	76,834
Accounts receivable:
Customer	92,050	73,205
Allowance for doubtful accounts	(636)	(563)
Associated companies	49,257	51,065
Other	14,986	8,647
Accrued unbilled revenues	47,426	50,171
Total accounts receivable	203,083	182,525
Deferred fuel costs	0	8,016
Fuel inventory - at average cost	15,139	11,931
Public Utilities, Inventory	57,972	47,255
Prepayments and other	7,149	9,365
TOTAL	334,944	296,046
OTHER PROPERTY AND INVESTMENTS
Non-utility property - at cost (less accumulated depreciation)	4,560	4,576
Escrow accounts	80,201	32,447
TOTAL	84,761	37,023
PROPERTY, PLANT, AND EQUIPMENT
Electric	5,672,589	4,780,720
Construction work in progress	88,373	128,149
TOTAL PROPERTY, PLANT, AND EQUIPMENT	5,760,962	4,908,869
Less - accumulated depreciation and amortization	1,894,000	1,641,821
PROPERTY, PLANT, AND EQUIPMENT - NET	3,866,962	3,267,048
Regulatory assets:
Regulatory Assets, Noncurrent	377,972	343,049
Other	10,105	3,638
Deferred Costs and Other Assets	388,077	346,687
TOTAL ASSETS	4,674,744	3,946,804
CURRENT LIABILITIES
Currently maturing long-term debt	0	150,000
Associated companies accounts payable	48,090	42,928
Accounts payable	94,729	79,117
Customer deposits	85,938	85,085
Taxes accrued	90,661	77,552
Interest accrued	18,900	20,231
Deferred fuel costs	70,402	0
Other	32,667	7,526
TOTAL	441,387	462,439
NON-CURRENT LIABILITIES
Deferred Income Tax Liabilities, Net	594,832	551,869
Accumulated deferred investment tax credits	9,602	10,186
Regulatory liability for income taxes - net	236,988	246,402
Other regulatory liabilities	21,512	33,622
Decommissioning trust fund	9,727	9,206
Loss Contingency Accrual	50,021	51,142
Pension and other postretirement liabilities	99,406	93,100
Long-term debt	1,614,129	1,175,750
Deferred Credits and Other Liabilities	54,989	20,862
TOTAL	2,691,206	2,192,139
Commitments and Contingencies
EQUITY
Members' Equity	1,542,151	1,292,226
Total common shareholders' equity	1,542,151	1,292,226	1,177,870	1,094,791
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	4,674,744	3,946,804
Entergy Texas [Member]
Cash and cash equivalents:
Cash	25	26
Temporary cash investments	12,904	30
Total cash and cash equivalents	12,929	56	115,513	6,181
Restricted Investments, Current	37,720	40,185
Accounts receivable:
Customer	59,365	69,714
Allowance for doubtful accounts	(471)	(461)
Associated companies	24,001	64,441
Other	17,050	12,275
Accrued unbilled revenues	50,048	51,288
Total accounts receivable	149,993	197,257
Fuel inventory - at average cost	47,593	42,667
Public Utilities, Inventory	46,056	41,883
Prepayments and other	21,012	15,903
TOTAL	315,303	337,951
OTHER PROPERTY AND INVESTMENTS
Investment in affiliates - at equity	396	448
Non-utility property - at cost (less accumulated depreciation)	376	376
Other	20,077	19,218
TOTAL	20,849	20,042
PROPERTY, PLANT, AND EQUIPMENT
Electric	5,199,027	4,773,984
Construction work in progress	760,354	325,193
TOTAL PROPERTY, PLANT, AND EQUIPMENT	5,959,381	5,099,177
Less - accumulated depreciation and amortization	1,770,852	1,684,569
PROPERTY, PLANT, AND EQUIPMENT - NET	4,188,529	3,414,608
Regulatory assets:
Regulatory Assets, Noncurrent	512,648	598,048
Other	33,393	29,371
Deferred Costs and Other Assets	546,041	627,419
TOTAL ASSETS	5,070,722	4,400,020
CURRENT LIABILITIES
Currently maturing long-term debt	0	500,000
Associated companies accounts payable	58,055	119,371
Accounts payable	188,460	150,679
Customer deposits	40,232	43,387
Taxes accrued	49,708	53,513
Interest accrued	18,992	24,355
Deferred fuel costs	13,001	19,697
Current portion of regulatory liability for income taxes - net related to unprotected ADIT	26,552	87,627
Other	10,521	6,353
TOTAL	405,521	1,004,982
NON-CURRENT LIABILITIES
Deferred Income Tax Liabilities, Net	585,413	552,535
Accumulated deferred investment tax credits	10,559	11,176
Regulatory liability for income taxes - net	225,980	264,623
Other regulatory liabilities	42,085	47,884
Decommissioning trust fund	7,631	7,222
Loss Contingency Accrual	8,108	13,856
Long-term debt	1,922,956	1,013,735
Deferred Credits and Other Liabilities	63,062	61,605
TOTAL	2,865,794	1,972,636
Commitments and Contingencies
Subsidiaries’ preferred stock without sinking fund	35,000	0
EQUITY
Common stock	49,452	49,452
Additional Paid in Capital, Common Stock	780,182	596,994
Retained Earnings (Accumulated Deficit)	934,773	775,956
Total common shareholders' equity	1,764,407	1,422,402
Total common shareholders' equity	1,799,407	1,422,402	1,260,167	1,068,994
Stockholders' Equity Attributable to Noncontrolling Interest	35,000	0
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	5,070,722	4,400,020
System Energy [Member]
Cash and cash equivalents:
Cash	93	68
Temporary cash investments	68,441	95,617
Total cash and cash equivalents	68,534	95,685	287,187	245,863
Accounts receivable:
Associated companies	121,972	148,571
Other	7,547	5,390
Total accounts receivable	129,519	153,961
Public Utilities, Inventory	108,766	97,225
Deferred nuclear refueling outage costs	14,493	44,424
Prepaid taxes	0	5,415
Prepayments and other	6,045	2,985
TOTAL	327,357	399,695
OTHER PROPERTY AND INVESTMENTS
Decommissioning trust funds	1,054,098	869,543
TOTAL	1,054,098	869,543
PROPERTY, PLANT, AND EQUIPMENT
Electric	5,070,859	5,036,116
Construction work in progress	164,996	70,156
Nuclear fuel	149,574	234,889
TOTAL PROPERTY, PLANT, AND EQUIPMENT	5,385,429	5,341,161
Less - accumulated depreciation and amortization	3,285,487	3,212,080
PROPERTY, PLANT, AND EQUIPMENT - NET	2,099,942	2,129,081
Regulatory assets:
Regulatory Assets, Noncurrent	490,083	446,371
Deferred Income Tax Assets, Net	8,023	0
Other	3,192	4,124
Deferred Costs and Other Assets	501,298	450,495
TOTAL ASSETS	3,982,695	3,848,814
CURRENT LIABILITIES
Currently maturing long-term debt	10	6
Associated companies accounts payable	14,619	11,031
Accounts payable	64,144	47,565
Taxes accrued	13,832	0
Interest accrued	11,993	13,295
Current portion of regulatory liability for income taxes - net related to unprotected ADIT	0	4,426
Other	3,381	2,832
TOTAL	107,979	79,155
NON-CURRENT LIABILITIES
Deferred Income Tax Liabilities, Net	821,963	805,296
Accumulated deferred investment tax credits	40,181	38,673
Regulatory liability for income taxes - net	142,845	158,998
Other regulatory liabilities	533,415	381,887
Decommissioning trust fund	931,729	896,000
Pension and other postretirement liabilities	109,816	98,639
Long-term debt	548,097	630,744
Deferred Credits and Other Liabilities	34,602	22,224
TOTAL	3,162,648	3,032,461
Commitments and Contingencies
EQUITY
Common stock	601,850	601,850
Retained Earnings (Accumulated Deficit)	110,218	135,348
Total common shareholders' equity	712,068	737,198	$ 710,809	$ 738,823
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 3,982,695	$ 3,848,814