Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Cash and cash equivalents:
Cash	$ 86,324	$ 112,992
Temporary cash investments	225,048	419,577
Total cash and cash equivalents	311,372	532,569
Securitization recovery trust account	36,922	46,040
Accounts receivable:
Customer	651,863	568,871
Allowance for doubtful accounts	(32,130)	(31,956)
Other	224,057	161,408
Accrued unbilled revenues	378,643	303,392
Total accounts receivable	1,222,433	1,001,715
Deferred fuel costs	158,461	150,363
Accumulated deferred income taxes	112,613	306,902
Fuel inventory - at average cost	207,640	213,831
Materials and supplies - at average cost	935,229	928,530
Deferred nuclear refueling outage costs	329,165	243,374
System agreement cost equalization	14,600	16,880
Prepayments and other	263,287	242,922
TOTAL	3,591,722	3,683,126
OTHER PROPERTY AND INVESTMENTS
Investment in affiliates - at equity	41,491	46,738
Decommissioning trust funds	4,466,620	4,190,108
Non-utility property - at cost (less accumulated depreciation)	260,609	256,039
Other	183,609	436,234
TOTAL	4,952,329	4,929,119
PROPERTY, PLANT AND EQUIPMENT
Electric	42,415,345	41,944,567
Property under capital lease	933,786	935,199
Natural gas	359,725	353,492
Construction work in progress	1,573,328	1,365,699
Nuclear fuel	1,634,366	1,598,430
TOTAL PROPERTY, PLANT AND EQUIPMENT	46,916,550	46,197,387
Less - accumulated depreciation and amortization	19,344,473	18,898,842
PROPERTY, PLANT AND EQUIPMENT - NET	27,572,077	27,298,545
Regulatory assets:
Regulatory asset for income taxes - net	754,870	742,030
Other regulatory assets	4,810,706	5,025,912
Deferred fuel costs	172,202	172,202
Goodwill	377,172	377,172
Accumulated deferred income taxes	66,843	37,748
Other	964,364	936,648
TOTAL	7,146,157	7,291,712
TOTAL ASSETS	43,262,285	43,202,502
CURRENT LIABILITIES
Currently maturing long-term debt	525,622	718,516
Notes payable	1,090,124	796,002
Accounts payable	1,170,405	1,217,180
Customer deposits	365,223	359,078
Taxes accrued	275,543	333,719
Accumulated deferred income taxes	22,103	13,109
Interest accrued	181,492	184,664
Deferred fuel costs	3,116	96,439
Obligations under capital leases	3,111	3,880
Pension and other postretirement liabilities	93,044	95,900
System agreement cost equalization	14,600	25,848
Other	239,571	261,986
TOTAL	3,983,954	4,106,321
NON-CURRENT LIABILITIES
Accumulated deferred income taxes and taxes accrued	8,339,892	8,311,756
Accumulated deferred investment tax credits	268,128	273,696
Obligations under capital leases	33,402	34,541
Other regulatory liabilities	997,421	898,614
Decommissioning trust fund	3,584,788	3,513,634
Accumulated provisions	112,450	362,226
Pension and other postretirement liabilities	3,753,697	3,725,886
Long-term debt	12,094,752	11,920,318
Other	538,773	577,910
TOTAL	29,723,303	29,618,581
Subsidiaries' preferred stock without sinking fund	186,511	186,511
Common Shareholders' Equity:
Common stock	2,548	2,548
Paid-in capital	5,355,753	5,357,852
Retained earnings	9,733,990	9,704,591
Accumulated other comprehensive loss	(274,303)	(293,083)
Less - treasury stock, at cost	5,543,471	5,574,819
Total common shareholders' equity	9,274,517	9,197,089
Subsidiaries' preferred stock without sinking fund	94,000	94,000
TOTAL	9,368,517	9,291,089
TOTAL LIABILITIES AND EQUITY	43,262,285	43,202,502
Entergy Arkansas [Member]
Cash and cash equivalents:
Cash	8,611	9,597
Temporary cash investments	34,391	24,936
Total cash and cash equivalents	43,002	34,533
Securitization recovery trust account	3,642	4,403
Accounts receivable:
Customer	100,046	98,036
Allowance for doubtful accounts	(28,301)	(28,343)
Associated companies	134,287	67,277
Other	124,767	71,956
Accrued unbilled revenues	96,552	72,902
Total accounts receivable	427,351	281,828
Deferred fuel costs	57,868	97,305
Accumulated deferred income taxes	67,767	72,196
Fuel inventory - at average cost	28,940	48,975
Materials and supplies - at average cost	153,078	148,682
Deferred nuclear refueling outage costs	44,148	38,410
System agreement cost equalization	0	0
Prepaid taxes	7,865	0
Prepayments and other	61,076	10,586
TOTAL	894,737	736,918
OTHER PROPERTY AND INVESTMENTS
Decommissioning trust funds	646,531	600,578
Non-utility property - at cost (less accumulated depreciation)	1,668	1,671
Other	41,182	41,182
TOTAL	689,381	643,431
PROPERTY, PLANT AND EQUIPMENT
Electric	8,746,097	8,693,659
Property under capital lease	1,111	1,154
Construction work in progress	226,372	205,982
Nuclear fuel	274,489	303,825
TOTAL PROPERTY, PLANT AND EQUIPMENT	9,248,069	9,204,620
Less - accumulated depreciation and amortization	4,153,577	4,104,882
PROPERTY, PLANT AND EQUIPMENT - NET	5,094,492	5,099,738
Regulatory assets:
Regulatory asset for income taxes - net	76,853	80,751
Other regulatory assets	1,216,652	1,221,636
Other	45,776	36,971
TOTAL	1,339,281	1,339,358
TOTAL ASSETS	8,017,891	7,819,445
CURRENT LIABILITIES
Currently maturing long-term debt	300,000	330,000
Short-term borrowings	29,943	36,735
Associated companies accounts payable	46,738	39,288
Other	156,241	200,964
Customer deposits	85,948	85,198
Taxes accrued		214,969
Accumulated deferred income taxes	3,529	5,927
Interest accrued	28,059	28,418
Other	59,696	45,208
TOTAL	710,154	986,707
NON-CURRENT LIABILITIES
Accumulated deferred income taxes and taxes accrued	1,881,613	1,829,281
Accumulated deferred investment tax credits	39,953	40,947
Other regulatory liabilities	166,306	143,901
Decommissioning trust fund	701,909	680,712
Accumulated provisions	5,826	5,822
Pension and other postretirement liabilities	604,521	614,805
Long-term debt	2,162,111	1,793,895
Other	12,767	27,409
TOTAL	5,575,006	5,136,772
Subsidiaries' preferred stock without sinking fund	116,350	116,350
Common Shareholders' Equity:
Common stock	470	470
Paid-in capital	588,444	588,444
Retained earnings	1,027,467	990,702
TOTAL	1,616,381	1,579,616
TOTAL LIABILITIES AND EQUITY	8,017,891	7,819,445
Entergy Gulf States Louisiana [Member]
Cash and cash equivalents:
Cash	284	35,085
Temporary cash investments	627	601
Total cash and cash equivalents	911	35,686
Accounts receivable:
Customer	79,458	53,480
Allowance for doubtful accounts	(600)	(711)
Associated companies	82,776	71,697
Other	25,345	18,736
Accrued unbilled revenues	61,883	51,586
Total accounts receivable	248,862	194,788
Deferred fuel costs	30,713	0
Fuel inventory - at average cost	32,504	26,967
Materials and supplies - at average cost	121,886	121,289
Deferred nuclear refueling outage costs	36,940	5,953
Gas hedge contracts	0	0
Prepaid taxes	29,466	0
Prepayments and other	11,200	7,911
TOTAL	512,482	392,594
OTHER PROPERTY AND INVESTMENTS
Investment in affiliates - at equity	289,664	289,664
Decommissioning trust funds	516,047	477,391
Non-utility property - at cost (less accumulated depreciation)	171,930	165,410
Escrow accounts	21,530	86,984
Other	13,946	13,404
TOTAL	1,013,117	1,032,853
PROPERTY, PLANT AND EQUIPMENT
Electric	7,342,458	7,279,953
Natural gas	139,334	135,723
Construction work in progress	131,427	125,448
Nuclear fuel	218,499	146,768
TOTAL PROPERTY, PLANT AND EQUIPMENT	7,831,718	7,687,892
Less - accumulated depreciation and amortization	4,052,589	4,003,385
PROPERTY, PLANT AND EQUIPMENT - NET	3,779,129	3,684,507
Regulatory assets:
Regulatory asset for income taxes - net	170,837	171,051
Other regulatory assets	370,471	409,653
Deferred fuel costs	100,124	100,124
Other	14,220	12,337
TOTAL	655,652	693,165
TOTAL ASSETS	5,960,380	5,803,119
CURRENT LIABILITIES
Currently maturing long-term debt	0	75,000
Associated companies accounts payable	142,863	89,377
Other	107,563	97,509
Customer deposits	50,694	48,265
Taxes accrued	0	21,021
Accumulated deferred income taxes	45,204	22,249
Interest accrued	24,872	25,437
Deferred fuel costs	0	948
Pension and other postretirement liabilities	8,014	7,803
Gas hedge contracts	2,130	2,620
Other	12,915	11,999
TOTAL	394,255	402,228
NON-CURRENT LIABILITIES
Accumulated deferred income taxes and taxes accrued	1,429,537	1,403,195
Accumulated deferred investment tax credits	76,804	78,312
Regulatory liability for income taxes - net	122,312	103,444
Decommissioning trust fund	391,795	380,822
Accumulated provisions	34,483	97,230
Pension and other postretirement liabilities	421,464	416,220
Long-term debt	1,657,248	1,442,429
Long-term payables of associated companies	28,571	29,510
Other	82,437	66,725
TOTAL	4,244,651	4,017,887
Common Shareholders' Equity:
Accumulated other comprehensive loss	(63,312)	(65,229)
Total common shareholders' equity	1,374,786	1,438,233
Subsidiaries' preferred stock without sinking fund	10,000	10,000
TOTAL	1,321,474	1,383,004
TOTAL LIABILITIES AND EQUITY	5,960,380	5,803,119
Entergy Louisiana [Member]
Cash and cash equivalents:
Cash	563	814
Temporary cash investments	2,629	29,272
Total cash and cash equivalents	3,192	30,086
Securitization recovery trust account	4,742	4,382
Accounts receivable:
Customer	153,612	86,072
Allowance for doubtful accounts	(1,125)	(867)
Associated companies	45,491	42,938
Other	9,230	9,354
Accrued unbilled revenues	99,154	79,354
Total accounts receivable	306,362	216,851
Deferred fuel costs	37,455	26,568
Accumulated deferred income taxes	30,692	113,319
Fuel inventory - at average cost	23,045	23,583
Materials and supplies - at average cost	150,613	152,170
Deferred nuclear refueling outage costs	31,599	44,457
Gas hedge contracts	0	0
Prepaid taxes	0	7,937
Prepayments and other	15,278	12,129
TOTAL	602,978	631,482
OTHER PROPERTY AND INVESTMENTS
Investment in affiliates - at equity	807,423	807,423
Decommissioning trust funds	311,667	287,418
Non-utility property - at cost (less accumulated depreciation)	487	578
Escrow accounts	0	186,985
TOTAL	1,119,577	1,282,404
PROPERTY, PLANT AND EQUIPMENT
Electric	8,657,044	8,603,319
Property under capital lease	324,440	324,440
Construction work in progress	563,704	404,714
Nuclear fuel	170,386	204,019
TOTAL PROPERTY, PLANT AND EQUIPMENT	9,715,574	9,536,492
Less - accumulated depreciation and amortization	3,679,824	3,590,146
PROPERTY, PLANT AND EQUIPMENT - NET	6,035,750	5,946,346
Regulatory assets:
Regulatory asset for income taxes - net	201,691	193,114
Other regulatory assets	822,766	913,562
Deferred fuel costs	67,998	67,998
Other	44,061	39,178
TOTAL	1,136,516	1,213,852
TOTAL ASSETS	8,894,821	9,074,084
CURRENT LIABILITIES
Currently maturing long-term debt	19,016	14,236
Short-term borrowings	41,859	54,657
Associated companies accounts payable	77,241	103,454
Other	191,659	266,904
Customer deposits	89,545	88,805
Taxes accrued	408	0
Accumulated deferred income taxes	5,030	0
Interest accrued	35,617	37,264
Deferred fuel costs	0	0
Pension and other postretirement liabilities	9,253	9,170
System agreement cost equalization	0	0
Gas hedge contracts	2,824	3,442
Other	15,567	13,382
TOTAL	488,019	591,314
NON-CURRENT LIABILITIES
Accumulated deferred income taxes and taxes accrued	926,808	930,606
Accumulated deferred investment tax credits	68,770	70,193
Other regulatory liabilities	413,891	376,801
Decommissioning trust fund	428,791	418,122
Accumulated provisions	10,956	196,474
Pension and other postretirement liabilities	544,497	539,703
Long-term debt	2,988,246	2,811,859
Other	71,563	68,516
TOTAL	5,453,522	5,412,274
Common Shareholders' Equity:
Accumulated other comprehensive loss	(44,771)	(46,132)
Total common shareholders' equity	2,898,051	3,016,628
Subsidiaries' preferred stock without sinking fund	100,000	100,000
TOTAL	2,953,280	3,070,496
TOTAL LIABILITIES AND EQUITY	8,894,821	9,074,084
Entergy Mississippi [Member]
Cash and cash equivalents:
Cash	1,067	585
Temporary cash investments	2,000	52,385
Total cash and cash equivalents	3,067	52,970
Accounts receivable:
Customer	66,429	49,836
Allowance for doubtful accounts	(892)	(910)
Associated companies	24,379	25,504
Other	10,244	11,072
Accrued unbilled revenues	50,902	43,045
Total accounts receivable	151,062	128,547
Deferred fuel costs	32,241	26,490
Accumulated deferred income taxes	30,808	44,027
Fuel inventory - at average cost	50,708	48,778
Materials and supplies - at average cost	39,594	40,331
Gas hedge contracts	0	0
Prepayments and other	7,124	5,329
TOTAL	314,604	346,472
OTHER PROPERTY AND INVESTMENTS
Non-utility property - at cost (less accumulated depreciation)	4,684	4,698
Escrow accounts	61,841	61,836
TOTAL	66,525	66,534
PROPERTY, PLANT AND EQUIPMENT
Electric	3,782,575	3,708,743
Property under capital lease	6,743	8,112
Construction work in progress	59,250	62,876
TOTAL PROPERTY, PLANT AND EQUIPMENT	3,848,568	3,779,731
Less - accumulated depreciation and amortization	1,369,030	1,324,627
PROPERTY, PLANT AND EQUIPMENT - NET	2,479,538	2,455,104
Regulatory assets:
Regulatory asset for income taxes - net	62,246	63,614
Other regulatory assets	404,728	401,471
Other	22,147	20,832
TOTAL	489,121	485,917
TOTAL ASSETS	3,349,788	3,354,027
CURRENT LIABILITIES
Currently maturing long-term debt	0	100,000
Short-term borrowings	70,021	21
Associated companies accounts payable	41,626	42,377
Other	67,894	44,856
Customer deposits	72,808	71,182
Taxes accrued	27,541	52,327
Accumulated deferred income taxes	1,028	218
Interest accrued	20,509	18,226
Other	29,081	21,490
TOTAL	330,508	350,697
NON-CURRENT LIABILITIES
Accumulated deferred income taxes and taxes accrued	764,692	761,812
Accumulated deferred investment tax credits	7,872	7,257
Obligations under capital leases	4,769	5,329
Other regulatory liabilities	1,510	1,235
Decommissioning trust fund	6,218	6,039
Accumulated provisions	35,829	35,820
Pension and other postretirement liabilities	158,689	160,866
Long-term debt	1,069,591	1,069,519
Other	16,009	25,426
TOTAL	2,065,179	2,073,303
Subsidiaries' preferred stock without sinking fund	50,381	50,381
Common Shareholders' Equity:
Common stock	199,326	199,326
Paid-in capital	(690)	(690)
Retained earnings	705,084	681,010
TOTAL	903,720	879,646
TOTAL LIABILITIES AND EQUITY	3,349,788	3,354,027
Entergy New Orleans
Cash and cash equivalents:
Cash	1,186	319
Temporary cash investments	27,310	9,072
Total cash and cash equivalents	28,496	9,391
Accounts receivable:
Customer	44,105	33,142
Allowance for doubtful accounts	(481)	(446)
Associated companies	83,883	29,326
Other	2,999	3,115
Accrued unbilled revenues	18,380	18,124
Total accounts receivable	148,886	83,261
Accumulated deferred income taxes	7,308	9,517
Fuel inventory - at average cost	1,357	1,777
Materials and supplies - at average cost	10,753	10,889
Prepaid taxes	2,424	1,377
Prepayments and other	9,988	3,201
TOTAL	209,212	119,413
OTHER PROPERTY AND INVESTMENTS
Non-utility property - at cost (less accumulated depreciation)	1,016	1,016
Escrow accounts	6,663	10,605
TOTAL	7,679	11,621
PROPERTY, PLANT AND EQUIPMENT
Electric	873,379	860,358
Natural gas	220,392	217,769
Construction work in progress	25,660	11,135
TOTAL PROPERTY, PLANT AND EQUIPMENT	1,119,431	1,089,262
Less - accumulated depreciation and amortization	564,257	549,587
PROPERTY, PLANT AND EQUIPMENT - NET	555,174	539,675
Regulatory assets:
Other regulatory assets	189,542	202,003
Deferred fuel costs	4,080	4,080
Other	6,434	4,997
TOTAL	200,056	211,080
TOTAL ASSETS	972,121	881,789
CURRENT LIABILITIES
Currently maturing long-term debt	70,000	70,000
Short-term borrowings	0	0
Associated companies accounts payable	36,729	28,778
Other	25,114	31,209
Customer deposits	22,313	21,974
Taxes accrued	0	0
Interest accrued	2,801	3,020
Deferred fuel costs	3,116	2,157
System agreement cost equalization	14,600	16,880
Other	7,514	3,479
TOTAL	182,187	177,497
NON-CURRENT LIABILITIES
Accumulated deferred income taxes and taxes accrued	173,244	172,790
Accumulated deferred investment tax credits	1,191	1,300
Regulatory liability for income taxes - net	9,993	24,291
Other regulatory liabilities	23,311	11,060
Decommissioning trust fund	2,269	2,193
Accumulated provisions	10,781	15,031
Pension and other postretirement liabilities	82,704	83,790
Long-term debt	225,938	126,300
Gas system rebuild insurance proceeds	37,329	44,207
Other	6,406	7,985
TOTAL	573,166	488,947
Subsidiaries' preferred stock without sinking fund	19,780	19,780
Common Shareholders' Equity:
Common stock	33,744	33,744
Paid-in capital	36,294	36,294
Retained earnings	126,950	125,527
TOTAL	196,988	195,565
TOTAL LIABILITIES AND EQUITY	972,121	881,789
Entergy Texas [Member]
Cash and cash equivalents:
Cash	2,002	528
Temporary cash investments	16,550	59,708
Total cash and cash equivalents	18,552	60,236
Securitization recovery trust account	28,538	37,255
Accounts receivable:
Customer	67,337	53,836
Allowance for doubtful accounts	(730)	(680)
Associated companies	107,485	68,750
Other	9,981	10,450
Accrued unbilled revenues	51,429	38,252
Total accounts receivable	235,502	170,608
Deferred fuel costs	184	0
Accumulated deferred income taxes	15,433	34,988
Fuel inventory - at average cost	59,725	55,388
Materials and supplies - at average cost	30,311	32,853
System agreement cost equalization	14,600	16,880
Prepaid taxes	0	53,668
Prepayments and other	11,019	18,206
TOTAL	413,864	480,082
OTHER PROPERTY AND INVESTMENTS
Investment in affiliates - at equity	657	678
Non-utility property - at cost (less accumulated depreciation)	492	638
Other	17,889	17,263
TOTAL	19,038	18,579
PROPERTY, PLANT AND EQUIPMENT
Electric	3,542,587	3,475,776
Construction work in progress	85,264	90,469
TOTAL PROPERTY, PLANT AND EQUIPMENT	3,627,851	3,566,245
Less - accumulated depreciation and amortization	1,357,506	1,332,349
PROPERTY, PLANT AND EQUIPMENT - NET	2,270,345	2,233,896
Regulatory assets:
Regulatory asset for income taxes - net	130,371	131,287
Other regulatory assets	1,068,652	1,114,536
Long-term receivables - associated companies	28,571	29,510
Other	18,537	17,891
TOTAL	1,246,131	1,293,224
TOTAL ASSETS	3,949,378	4,025,781
CURRENT LIABILITIES
Associated companies accounts payable	117,927	88,743
Other	65,243	65,261
Customer deposits	38,729	38,859
Taxes accrued	66,684	0
Interest accrued	31,772	32,166
Deferred fuel costs	0	93,334
Pension and other postretirement liabilities	821	853
System agreement cost equalization	0	8,968
Other	4,315	2,839
TOTAL	325,491	331,023
NON-CURRENT LIABILITIES
Accumulated deferred income taxes and taxes accrued	962,613	1,009,081
Accumulated deferred investment tax credits	16,945	17,743
Other regulatory liabilities	5,422	6,150
Decommissioning trust fund	4,224	4,103
Accumulated provisions	8,733	6,609
Pension and other postretirement liabilities	150,970	155,241
Long-term debt	1,584,877	1,617,813
Other	24,082	23,872
TOTAL	2,757,866	2,840,612
Common Shareholders' Equity:
Common stock	49,452	49,452
Paid-in capital	481,994	481,994
Retained earnings	334,575	322,700
TOTAL	866,021	854,146
TOTAL LIABILITIES AND EQUITY	3,949,378	4,025,781
System Energy [Member]
Cash and cash equivalents:
Cash	620	100
Temporary cash investments	0	83,522
Total cash and cash equivalents	620	83,622
Accounts receivable:
Associated companies	56,425	93,381
Other	4,869	5,904
Total accounts receivable	61,294	99,285
Accumulated deferred income taxes	29,250	74,331
Materials and supplies - at average cost	84,798	82,443
Deferred nuclear refueling outage costs	20,156	35,155
Prepaid taxes	30,509	0
Prepayments and other	6,196	2,080
TOTAL	232,823	376,916
OTHER PROPERTY AND INVESTMENTS
Decommissioning trust funds	537,585	490,572
TOTAL	537,585	490,572
PROPERTY, PLANT AND EQUIPMENT
Electric	3,995,656	3,987,672
Property under capital lease	569,355	569,355
Construction work in progress	45,244	40,392
Nuclear fuel	212,637	252,682
TOTAL PROPERTY, PLANT AND EQUIPMENT	4,822,892	4,850,101
Less - accumulated depreciation and amortization	2,632,353	2,568,862
PROPERTY, PLANT AND EQUIPMENT - NET	2,190,539	2,281,239
Regulatory assets:
Regulatory asset for income taxes - net	122,866	126,503
Other regulatory assets	322,566	330,074
Other	16,912	18,212
TOTAL	462,344	474,789
TOTAL ASSETS	3,423,291	3,623,516
CURRENT LIABILITIES
Currently maturing long-term debt	119,229	111,854
Short-term borrowings	1,053	39,986
Associated companies accounts payable	56,514	5,564
Other	29,086	44,433
Taxes accrued	0	181,477
Accumulated deferred income taxes	1,029	1,789
Interest accrued	12,365	15,619
Other	2,438	2,429
TOTAL	221,714	403,151
NON-CURRENT LIABILITIES
Accumulated deferred income taxes and taxes accrued	783,134	782,469
Accumulated deferred investment tax credits	54,906	56,188
Other regulatory liabilities	264,669	256,024
Decommissioning trust fund	495,789	478,371
Pension and other postretirement liabilities	140,840	142,617
Long-term debt	623,725	671,945
Other	45	22
TOTAL	2,363,108	2,387,636
Common Shareholders' Equity:
Common stock	789,350	789,350
Retained earnings	49,119	43,379
TOTAL	838,469	832,729
TOTAL LIABILITIES AND EQUITY	$ 3,423,291	$ 3,623,516