Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Cash and cash equivalents:
Cash	$ 60,868	$ 129,579
Temporary cash investments	1,022,194	1,058,265
Total cash and cash equivalents	1,083,062	1,187,844
Accounts receivable:
Customer	512,225	654,995
Allowance for doubtful accounts	(12,524)	(11,924)
Other	134,223	158,419
Accrued unbilled revenues	339,219	368,677
Total accounts receivable	973,143	1,170,167
Deferred fuel costs	117,971	108,465
Fuel inventory - at average cost	173,135	179,600
Materials and supplies - at average cost	681,267	698,523
Deferred nuclear refueling outage costs	160,550	146,221
Prepayments and other	208,363	193,448
TOTAL	3,397,491	3,684,268
OTHER PROPERTY AND INVESTMENTS
Investment in affiliates - at equity	198	198
Decommissioning trust funds	6,669,326	5,723,897
Non-utility property - at cost (less accumulated depreciation)	243,683	233,641
Other	451,715	469,664
TOTAL	7,364,922	6,427,400
PROPERTY, PLANT, AND EQUIPMENT
Electric	45,385,925	45,191,216
Property under capital lease	619,135	619,527
Natural gas	418,862	413,224
Construction work in progress	1,594,449	1,378,180
Nuclear fuel	998,013	1,037,899
TOTAL PROPERTY, PLANT, AND EQUIPMENT	49,016,384	48,640,046
Less - accumulated depreciation and amortization	20,843,031	20,718,639
PROPERTY, PLANT, AND EQUIPMENT - NET	28,173,353	27,921,407
Regulatory assets:
Regulatory asset for income taxes - net	764,266	761,280
Other regulatory assets	4,719,430	4,769,913
Deferred fuel costs	239,149	239,100
Goodwill	377,172	377,172
Accumulated deferred income taxes	115,134	117,885
Other	167,289	1,606,009
TOTAL	6,382,440	7,871,359
TOTAL ASSETS	45,318,206	45,904,434
CURRENT LIABILITIES
Currently maturing long-term debt	333,709	364,900
Notes payable and commercial paper	1,323,390	415,011
Accounts payable	1,149,498	1,285,577
Customer deposits	403,842	403,311
Taxes Payable, Current	122,282	181,114
Interest accrued	173,308	187,229
Deferred fuel costs	104,920	102,753
Obligations under capital leases	2,721	2,423
Pension and other postretirement liabilities	73,317	76,942
Other	192,056	180,836
TOTAL	3,879,043	3,200,096
NON-CURRENT LIABILITIES
Accumulated deferred income taxes and taxes accrued	7,561,382	7,495,290
Accumulated deferred investment tax credits	224,338	227,147
Obligations under capital leases	23,573	24,582
Other regulatory liabilities	1,554,605	1,572,929
Decommissioning and asset retirement cost liabilities	6,078,576	5,992,476
Accumulated provisions	477,281	481,636
Pension and other postretirement liabilities	2,953,206	3,036,010
Long-term debt	13,927,204	14,467,655
Other	378,624	1,121,619
TOTAL	33,178,789	34,419,344
Subsidiaries' preferred stock without sinking fund	203,185	203,185
Common Shareholders' Equity:
Common stock	2,548	2,548
Paid-in capital	5,398,079	5,417,245
Retained earnings	8,122,103	8,195,571
Accumulated other comprehensive income (loss)	10,960	(34,971)
Less - treasury stock, at cost	5,476,501	5,498,584
TOTAL	8,057,189	8,081,809
TOTAL	8,057,189	8,081,809
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	45,318,206	45,904,434
Entergy Arkansas [Member]
Cash and cash equivalents:
Cash	139	20,174
Temporary cash investments	336	335
Total cash and cash equivalents	475	20,509
Securitization recovery trust account	7,842	4,140
Accounts receivable:
Customer	91,838	102,229
Allowance for doubtful accounts	(1,197)	(1,211)
Associated companies	32,096	35,286
Other	38,312	58,153
Accrued unbilled revenues	80,246	100,193
Total accounts receivable	241,295	294,650
Deferred fuel costs	105,778	96,690
Fuel inventory - at average cost	38,507	32,760
Materials and supplies - at average cost	176,958	182,600
Deferred nuclear refueling outage costs	70,579	81,313
Prepayments and other	9,387	14,293
TOTAL	650,821	726,955
OTHER PROPERTY AND INVESTMENTS
Decommissioning trust funds	867,746	834,735
Other	5,538	7,912
TOTAL	873,284	842,647
PROPERTY, PLANT, AND EQUIPMENT
Electric	10,459,549	10,488,060
Property under capital lease	679	716
Construction work in progress	391,018	304,073
Nuclear fuel	266,045	307,352
TOTAL PROPERTY, PLANT, AND EQUIPMENT	11,117,291	11,100,201
Less - accumulated depreciation and amortization	4,610,294	4,635,885
PROPERTY, PLANT, AND EQUIPMENT - NET	6,506,997	6,464,316
Regulatory assets:
Regulatory asset for income taxes - net	63,986	62,646
Other regulatory assets	1,424,874	1,428,029
Deferred fuel costs	66,947	66,898
Other	20,149	14,626
TOTAL	1,575,956	1,572,199
TOTAL ASSETS	9,607,058	9,606,117
CURRENT LIABILITIES
Currently maturing long-term debt	114,700	114,700
Short-term borrowings	52,300	0
Associated companies accounts payable	161,666	239,711
Other	155,810	185,153
Customer deposits	97,817	97,512
Taxes Payable, Current	14,369	7,194
Interest accrued	25,142	16,580
Other	28,114	36,557
TOTAL	649,918	697,407
NON-CURRENT LIABILITIES
Accumulated deferred income taxes and taxes accrued	2,200,404	2,186,623
Accumulated deferred investment tax credits	35,005	35,305
Other regulatory liabilities	329,342	305,907
Decommissioning and asset retirement cost liabilities	938,247	924,353
Accumulated provisions	20,679	18,682
Pension and other postretirement liabilities	404,654	424,234
Long-term debt	2,715,778	2,715,085
Other	14,417	13,854
TOTAL	6,658,526	6,624,043
Subsidiaries' preferred stock without sinking fund	31,350	31,350
Common Shareholders' Equity:
Common stock	470	470
Paid-in capital	790,243	790,243
Retained earnings	1,476,551	1,462,604
TOTAL	2,267,264	2,253,317
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	9,607,058	9,606,117
Entergy Louisiana [Member]
Cash and cash equivalents:
Cash	2,639	49,972
Temporary cash investments	64,654	163,878
Total cash and cash equivalents	67,293	213,850
Accounts receivable:
Customer	173,598	213,517
Allowance for doubtful accounts	(6,889)	(6,277)
Associated companies	136,949	155,794
Other	48,471	54,186
Accrued unbilled revenues	152,848	159,176
Total accounts receivable	504,977	576,396
Fuel inventory - at average cost	47,672	50,738
Materials and supplies - at average cost	286,906	294,421
Deferred nuclear refueling outage costs	58,207	22,535
Prepaid Taxes	87,541	110,104
Prepayments and other	35,109	41,687
TOTAL	1,087,705	1,309,731
OTHER PROPERTY AND INVESTMENTS
Investment in affiliates - at equity	1,390,587	1,390,587
Decommissioning trust funds	1,190,105	1,140,707
Non-utility property - at cost (less accumulated depreciation)	227,684	217,494
Storm Reserve Escrow Account	282,981	291,485
Other	24,261	28,844
TOTAL	3,115,618	3,069,117
PROPERTY, PLANT, AND EQUIPMENT
Electric	18,937,417	18,827,532
Natural gas	175,438	172,816
Construction work in progress	799,802	670,201
Nuclear fuel	361,069	249,807
TOTAL PROPERTY, PLANT, AND EQUIPMENT	20,273,726	19,920,356
Less - accumulated depreciation and amortization	8,475,891	8,420,596
PROPERTY, PLANT, AND EQUIPMENT - NET	11,797,835	11,499,760
Regulatory assets:
Regulatory asset for income taxes - net	472,806	470,480
Other regulatory assets	1,136,810	1,168,058
Deferred fuel costs	168,122	168,122
Other	20,982	16,003
TOTAL	1,798,720	1,822,663
TOTAL ASSETS	17,799,878	17,701,271
CURRENT LIABILITIES
Currently maturing long-term debt	161,506	200,198
Short-term borrowings	72,497	3,794
Associated companies accounts payable	71,512	82,106
Other	308,209	358,741
Customer deposits	149,063	148,601
Interest accrued	81,581	75,598
Deferred fuel costs	28,724	48,211
Other	70,178	80,013
TOTAL	943,270	997,262
NON-CURRENT LIABILITIES
Accumulated deferred income taxes and taxes accrued	2,849,713	2,691,118
Accumulated deferred investment tax credits	125,523	126,741
Other regulatory liabilities	821,005	880,974
Decommissioning and asset retirement cost liabilities	1,096,846	1,082,685
Accumulated provisions	306,713	310,772
Pension and other postretirement liabilities	763,093	780,278
Long-term debt	5,613,849	5,612,593
Other	146,178	137,039
TOTAL	11,722,920	11,622,200
Common Shareholders' Equity:
Accumulated other comprehensive income (loss)	(48,812)	(48,442)
Members' Equity	5,182,500	5,130,251
TOTAL	5,133,688	5,081,809
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	17,799,878	17,701,271
Entergy Mississippi [Member]
Cash and cash equivalents:
Cash	40	16
Temporary cash investments	7	76,818
Total cash and cash equivalents	47	76,834
Accounts receivable:
Customer	52,724	51,218
Allowance for doubtful accounts	(554)	(549)
Associated companies	27,529	45,973
Other	6,112	12,006
Accrued unbilled revenues	45,679	51,327
Total accounts receivable	131,490	159,975
Deferred fuel costs	12,193	6,957
Fuel inventory - at average cost	48,200	50,872
Materials and supplies - at average cost	41,833	41,146
Prepayments and other	7,799	8,873
TOTAL	241,562	344,657
OTHER PROPERTY AND INVESTMENTS
Non-utility property - at cost (less accumulated depreciation)	4,604	4,608
Escrow accounts	31,826	31,783
TOTAL	36,430	36,391
PROPERTY, PLANT, AND EQUIPMENT
Electric	4,333,218	4,321,214
Property under capital lease	1,234	1,590
Construction work in progress	154,285	118,182
TOTAL PROPERTY, PLANT, AND EQUIPMENT	4,488,737	4,440,986
Less - accumulated depreciation and amortization	1,601,042	1,602,711
PROPERTY, PLANT, AND EQUIPMENT - NET	2,887,695	2,838,275
Regulatory assets:
Regulatory asset for income taxes - net	38,694	38,284
Other regulatory assets	352,721	342,213
Other	5,732	2,320
TOTAL	397,147	382,817
TOTAL ASSETS	3,562,834	3,602,140
CURRENT LIABILITIES
Associated companies accounts payable	53,350	43,647
Other	54,982	80,227
Customer deposits	84,619	84,112
Taxes Payable, Current	25,215	64,040
Interest accrued	18,700	21,653
Other	8,351	9,554
TOTAL	245,217	303,233
NON-CURRENT LIABILITIES
Accumulated deferred income taxes and taxes accrued	873,335	861,331
Accumulated deferred investment tax credits	8,627	8,667
Decommissioning and asset retirement cost liabilities	8,844	8,722
Accumulated provisions	52,668	54,440
Pension and other postretirement liabilities	104,941	109,551
Long-term debt	1,121,139	1,120,916
Other	15,971	20,108
TOTAL	2,185,525	2,183,735
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	912,218	895,298
TOTAL	1,111,711	1,094,791
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	3,562,834	3,602,140
Entergy New Orleans [Member]
Cash and cash equivalents:
Cash	1,026	28
Temporary cash investments	55,042	103,040
Total cash and cash equivalents	56,068	103,068
Securitization recovery trust account	4,650	1,738
Accounts receivable:
Customer	45,409	43,536
Allowance for doubtful accounts	(3,090)	(3,059)
Associated companies	28,835	16,811
Other	10,688	5,926
Accrued unbilled revenues	14,385	18,254
Total accounts receivable	96,227	81,468
Deferred fuel costs	0	4,818
Fuel inventory - at average cost	43	1,841
Materials and supplies - at average cost	9,588	8,416
Prepaid Taxes	6,371	4,379
Prepayments and other	18,610	6,587
TOTAL	191,557	212,315
OTHER PROPERTY AND INVESTMENTS
Non-utility property - at cost (less accumulated depreciation)	1,016	1,016
Storm Reserve Escrow Account	81,547	81,437
Other	4,787	7,160
TOTAL	87,350	89,613
PROPERTY, PLANT, AND EQUIPMENT
Electric	1,251,117	1,258,934
Natural gas	243,424	240,408
Construction work in progress	34,337	24,975
TOTAL PROPERTY, PLANT, AND EQUIPMENT	1,528,878	1,524,317
Less - accumulated depreciation and amortization	600,391	604,825
PROPERTY, PLANT, AND EQUIPMENT - NET	928,487	919,492
Regulatory assets:
Other regulatory assets	267,806	268,106
Deferred fuel costs	4,080	4,080
Other	1,597	963
TOTAL	273,483	273,149
TOTAL ASSETS	1,480,877	1,494,569
CURRENT LIABILITIES
Current payable due Entergy Louisiana	2,104	2,104
Associated companies accounts payable	40,414	39,260
Other	21,095	35,920
Customer deposits	28,714	28,667
Interest accrued	5,477	5,443
Deferred fuel costs	1,278	0
Other	9,084	11,415
TOTAL	108,166	122,809
NON-CURRENT LIABILITIES
Accumulated deferred income taxes and taxes accrued	342,757	334,953
Accumulated deferred investment tax credits	590	622
Regulatory liability for income taxes - net	7,491	9,074
Decommissioning and asset retirement cost liabilities	2,924	2,875
Accumulated provisions	87,858	88,513
Pension and other postretirement liabilities	32,835	36,750
Long-term debt	428,607	428,467
Gas system rebuild insurance proceeds	0	447
Long-term payable due to Entergy Louisiana	18,423	18,423
Other	5,963	4,910
TOTAL	927,448	925,034
Subsidiaries' preferred stock without sinking fund	19,780	19,780
Common Shareholders' Equity:
Common stock	33,744	33,744
Paid-in capital	171,544	171,544
Retained earnings	220,195	221,658
TOTAL	425,483	426,946
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	1,480,877	1,494,569
Entergy Texas [Member]
Cash and cash equivalents:
Cash	59	1,216
Temporary cash investments	29	4,965
Total cash and cash equivalents	88	6,181
Securitization recovery trust account	26,274	37,451
Accounts receivable:
Customer	64,907	71,803
Allowance for doubtful accounts	(794)	(828)
Associated companies	38,832	39,447
Other	15,901	14,756
Accrued unbilled revenues	46,061	39,727
Total accounts receivable	164,907	164,905
Fuel inventory - at average cost	32,596	37,177
Materials and supplies - at average cost	37,456	36,631
Prepayments and other	26,857	18,599
TOTAL	288,178	300,944
OTHER PROPERTY AND INVESTMENTS
Investment in affiliates - at equity	595	600
Non-utility property - at cost (less accumulated depreciation)	376	376
Other	18,909	18,801
TOTAL	19,880	19,777
PROPERTY, PLANT, AND EQUIPMENT
Electric	4,334,548	4,274,069
Construction work in progress	96,598	111,227
TOTAL PROPERTY, PLANT, AND EQUIPMENT	4,431,146	4,385,296
Less - accumulated depreciation and amortization	1,528,921	1,526,057
PROPERTY, PLANT, AND EQUIPMENT - NET	2,902,225	2,859,239
Regulatory assets:
Regulatory asset for income taxes - net	105,339	105,816
Other regulatory assets	716,871	740,156
Other	9,269	7,149
TOTAL	831,479	853,121
TOTAL ASSETS	4,041,762	4,033,081
CURRENT LIABILITIES
Associated companies accounts payable	76,272	47,867
Other	81,186	77,342
Customer deposits	43,630	44,419
Taxes Payable, Current	31,461	15,351
Interest accrued	19,161	25,977
Deferred fuel costs	74,918	54,543
Other	6,671	9,388
TOTAL	333,299	274,887
NON-CURRENT LIABILITIES
Accumulated deferred income taxes and taxes accrued	999,737	1,027,647
Accumulated deferred investment tax credits	12,696	12,934
Other regulatory liabilities	6,004	8,502
Decommissioning and asset retirement cost liabilities	6,559	6,470
Accumulated provisions	8,247	7,584
Pension and other postretirement liabilities	61,507	67,313
Long-term debt	1,484,583	1,508,407
Other	49,282	50,343
TOTAL	2,628,615	2,689,200
Common Shareholders' Equity:
Common stock	49,452	49,452
Paid-in capital	481,994	481,994
Retained earnings	548,402	537,548
TOTAL	1,079,848	1,068,994
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	4,041,762	4,033,081
System Energy [Member]
Cash and cash equivalents:
Cash	797	786
Temporary cash investments	239,611	245,077
Total cash and cash equivalents	240,408	245,863
Accounts receivable:
Associated companies	170,154	104,390
Other	4,664	3,637
Total accounts receivable	174,818	108,027
Materials and supplies - at average cost	84,032	82,469
Deferred nuclear refueling outage costs	20,100	24,729
Prepaid Taxes	30,914	15,882
Prepayments and other	8,408	4,229
TOTAL	558,680	481,199
OTHER PROPERTY AND INVESTMENTS
Decommissioning trust funds	815,975	780,496
TOTAL	815,975	780,496
PROPERTY, PLANT, AND EQUIPMENT
Electric	4,341,221	4,331,668
Property under capital lease	585,084	585,084
Construction work in progress	44,636	43,888
Nuclear fuel	220,030	259,635
TOTAL PROPERTY, PLANT, AND EQUIPMENT	5,190,971	5,220,275
Less - accumulated depreciation and amortization	3,094,345	3,063,249
PROPERTY, PLANT, AND EQUIPMENT - NET	2,096,626	2,157,026
Regulatory assets:
Regulatory asset for income taxes - net	90,931	93,127
Other regulatory assets	414,979	411,212
Other	4,591	4,652
TOTAL	510,501	508,991
TOTAL ASSETS	3,981,782	3,927,712
CURRENT LIABILITIES
Currently maturing long-term debt	3	50,003
Short-term borrowings	110,744	66,893
Associated companies accounts payable	4,124	5,843
Other	43,094	50,558
Interest accrued	14,344	14,049
Other	2,959	2,957
TOTAL	175,268	190,303
NON-CURRENT LIABILITIES
Accumulated deferred income taxes and taxes accrued	1,127,742	1,112,865
Accumulated deferred investment tax credits	40,714	41,663
Other regulatory liabilities	394,263	370,862
Decommissioning and asset retirement cost liabilities	867,434	854,202
Pension and other postretirement liabilities	113,663	117,850
Long-term debt	501,212	501,129
Other	2,316	15
TOTAL	3,047,344	2,998,586
Common Shareholders' Equity:
Common stock	679,350	679,350
Retained earnings	79,820	59,473
TOTAL	759,170	738,823
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 3,981,782	$ 3,927,712