Retirement, Other Postretirement Benefits, And Defined Contribution Plans (Schedule Of Net Periodic Pension Cost) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Other Postretirement [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	$ 43,493	$ 74,654	$ 68,883
Interest cost	71,841	79,453	82,561
Expected return on assets	(44,787)	(40,323)	(34,503)
Amortization of transition obligation	0	0	3,177
Amortization of prior credit	(31,590)	(14,904)	(18,163)
Recognized net loss	11,143	44,178	36,448
Curtailment loss	0	12,729	0
Net periodic pension costs	50,100	155,787	138,403
Prior service credit for period	(35,864)	(116,571)	0
Net (gain)/loss	287,313	(405,976)	92,584
Amortization of transition obligation	0	0	3,177
Amortization of prior service cost/(credit)	31,590	14,904	18,163
Acceleration of prior service cost due to curtailment	0	1,989	0
Amortization of net loss	11,143	44,178	36,448
Total	271,896	(549,832)	71,122
Total recognized as net periodic benefit cost, regulatory asset, and/or AOCI (before tax)	321,996	(394,045)	209,525
Prior service cost	(37,280)	(31,589)	(13,336)
Net loss	31,591	11,197	45,217
Non-Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior credit	60,300	59,100
Net periodic pension costs	32,400	54,500	26,500
Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	140,436	172,280	150,763
Interest cost	290,076	263,296	260,929
Expected return on assets	(361,462)	(328,227)	(317,423)
Amortization of prior credit	1,600	2,125	2,733
Recognized net loss	145,095	213,194	167,279
Curtailment loss	0	16,318	0
Special termination benefit	732	13,139	0
Net periodic pension costs	216,477	352,125	264,281
Net (gain)/loss	1,389,912	(894,150)	552,303
Amortization of prior service cost/(credit)	(1,600)	(2,125)	(2,733)
Acceleration of prior service cost due to curtailment	0	(1,307)	0
Amortization of net loss	145,095	213,194	167,279
Total	1,243,217	(1,110,776)	382,291
Total recognized as net periodic benefit cost, regulatory asset, and/or AOCI (before tax)	1,459,694	(758,651)	646,572
Prior service cost	1,561	1,600	2,268
Net loss	237,013	146,958	219,805
Entergy Arkansas [Member] | Other Postretirement [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	5,957	9,619	9,089
Interest cost	12,261	13,545	14,452
Expected return on assets	(19,135)	(16,843)	(14,029)
Amortization of transition obligation			820
Amortization of prior credit	(2,441)	(689)	(530)
Recognized net loss	1,267	7,976	8,305
Curtailment loss		4,517
Net periodic pension costs	(2,091)	18,125	18,107
Prior service credit for period	0	(11,617)
Net (gain)/loss	55,642	(81,236)	9,066
Amortization of transition obligation			820
Amortization of prior service cost/(credit)	2,441	689	530
Acceleration of prior service cost due to curtailment		78
Amortization of net loss	1,267	7,976	8,305
Total	56,816	(100,062)	471
Total recognized as net periodic benefit cost, regulatory asset, and/or AOCI (before tax)	54,725	(81,937)	18,578
Prior service cost	(2,441)	(2,441)	(530)
Net loss	5,356	1,267	8,163
Entergy Arkansas [Member] | Non-Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net periodic pension costs	754	448	464
Entergy Arkansas [Member] | Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	20,090	25,229	22,169
Interest cost	59,537	54,473	55,686
Expected return on assets	(73,218)	(66,951)	(65,763)
Amortization of prior credit	0	23	200
Recognized net loss	35,956	49,517	40,772
Curtailment loss		4,938
Special termination benefit		1,784
Net periodic pension costs	42,365	69,013	53,064
Net (gain)/loss	300,907	(177,105)	105,133
Amortization of prior service cost/(credit)	0	(23)	(200)
Amortization of net loss	35,956	49,517	40,772
Total	264,951	(226,645)	64,161
Total recognized as net periodic benefit cost, regulatory asset, and/or AOCI (before tax)	307,316	(157,632)	117,225
Prior service cost		0	23
Net loss	54,254	35,984	50,175
Entergy Gulf States Louisiana [Member] | Other Postretirement [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	4,896	7,910	7,521
Interest cost	8,378	8,964	9,590
Expected return on assets	0	0	0
Amortization of transition obligation			238
Amortization of prior credit	(2,237)	(942)	(824)
Recognized net loss	1,212	4,598	4,737
Curtailment loss		1,546
Net periodic pension costs	12,249	22,076	21,262
Prior service credit for period	(12,845)	(8,705)
Net (gain)/loss	36,467	(40,938)	5,818
Amortization of transition obligation			238
Amortization of prior service cost/(credit)	2,237	942	824
Acceleration of prior service cost due to curtailment		91
Amortization of net loss	1,212	4,598	4,737
Total	24,647	(53,208)	1,667
Total recognized as net periodic benefit cost, regulatory asset, and/or AOCI (before tax)	36,896	(31,132)	22,929
Prior service cost	(4,086)	(2,236)	(824)
Net loss	3,908	1,212	4,693
Entergy Gulf States Louisiana [Member] | Non-Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net periodic pension costs	130	151	158
Entergy Gulf States Louisiana [Member] | Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	11,524	14,258	12,273
Interest cost	29,114	26,741	25,679
Expected return on assets	(37,950)	(34,982)	(34,370)
Amortization of prior credit	0	9	19
Recognized net loss	15,923	23,374	16,173
Curtailment loss		805
Special termination benefit		808
Net periodic pension costs	18,611	31,013	19,774
Net (gain)/loss	125,090	(98,610)	77,207
Amortization of prior service cost/(credit)	0	(9)	(19)
Amortization of net loss	15,923	23,374	16,173
Total	109,167	(121,993)	61,015
Total recognized as net periodic benefit cost, regulatory asset, and/or AOCI (before tax)	127,778	(90,980)	80,789
Prior service cost		0	9
Net loss	23,098	15,935	23,731
Entergy Louisiana [Member] | Other Postretirement [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	4,518	8,541	7,796
Interest cost	8,264	9,410	9,781
Expected return on assets	0	0	0
Amortization of transition obligation			382
Amortization of prior credit	(3,377)	(508)	(247)
Recognized net loss	1,511	5,050	4,359
Curtailment loss		1,848
Net periodic pension costs	10,916	24,341	22,071
Prior service credit for period	0	(18,844)
Net (gain)/loss	24,582	(43,743)	16,215
Amortization of transition obligation			382
Amortization of prior service cost/(credit)	3,377	508	247
Acceleration of prior service cost due to curtailment		41
Amortization of net loss	1,511	5,050	4,359
Total	26,448	(67,088)	11,721
Total recognized as net periodic benefit cost, regulatory asset, and/or AOCI (before tax)	37,364	(42,747)	33,792
Prior service cost	(3,381)	(3,376)	(247)
Net loss	3,210	1,511	5,149
Entergy Louisiana [Member] | Non-Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net periodic pension costs	5	12	12
Entergy Louisiana [Member] | Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	14,182	17,044	14,675
Interest cost	37,870	34,857	35,201
Expected return on assets	(45,796)	(41,948)	(40,836)
Amortization of prior credit	0	83	208
Recognized net loss	24,523	34,107	28,197
Curtailment loss		3,542
Special termination benefit		1,631
Net periodic pension costs	30,779	49,316	37,445
Net (gain)/loss	193,842	(123,234)	76,163
Amortization of prior service cost/(credit)	0	(83)	(208)
Amortization of net loss	24,523	34,107	28,197
Total	169,319	(157,424)	47,758
Total recognized as net periodic benefit cost, regulatory asset, and/or AOCI (before tax)	200,098	(108,108)	85,203
Prior service cost		0	83
Net loss	36,704	24,360	34,906
Entergy Mississippi [Member] | Other Postretirement [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	1,900	3,246	3,093
Interest cost	3,655	4,289	4,716
Expected return on assets	(5,771)	(5,335)	(4,521)
Amortization of transition obligation			351
Amortization of prior credit	(915)	(204)	(139)
Recognized net loss	149	2,534	2,920
Curtailment loss		596
Net periodic pension costs	(982)	5,126	6,420
Prior service credit for period	0	(4,714)
Net (gain)/loss	9,525	(30,018)	271
Amortization of transition obligation			351
Amortization of prior service cost/(credit)	915	204	139
Acceleration of prior service cost due to curtailment		20
Amortization of net loss	149	2,534	2,920
Total	10,291	(37,042)	(2,861)
Total recognized as net periodic benefit cost, regulatory asset, and/or AOCI (before tax)	9,309	(31,916)	3,559
Prior service cost	(916)	(918)	(139)
Net loss	860	149	2,650
Entergy Mississippi [Member] | Non-Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net periodic pension costs	190	192	183
Entergy Mississippi [Member] | Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	6,094	7,295	6,410
Interest cost	17,273	15,802	16,279
Expected return on assets	(22,794)	(21,139)	(20,945)
Amortization of prior credit	0	10	30
Recognized net loss	9,415	13,189	10,532
Curtailment loss		767
Special termination benefit		359
Net periodic pension costs	9,988	16,283	12,306
Net (gain)/loss	88,199	(52,525)	27,106
Amortization of prior service cost/(credit)	0	(10)	(30)
Amortization of net loss	9,415	13,189	10,532
Total	78,784	(65,724)	16,544
Total recognized as net periodic benefit cost, regulatory asset, and/or AOCI (before tax)	88,772	(49,441)	28,850
Prior service cost		0	10
Net loss	14,896	9,421	13,375
Entergy New Orleans [Member] | Other Postretirement [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	868	1,752	1,689
Interest cost	2,805	3,135	3,422
Expected return on assets	(4,475)	(4,101)	(3,711)
Amortization of transition obligation			1,189
Amortization of prior credit	(709)	(24)	38
Recognized net loss	56	1,509	1,559
Curtailment loss		354
Net periodic pension costs	(1,455)	2,625	4,186
Prior service credit for period	0	(4,469)
Net (gain)/loss	6,309	(18,508)	2,260
Amortization of transition obligation			1,189
Amortization of prior service cost/(credit)	709	24	(38)
Acceleration of prior service cost due to curtailment		(4)
Amortization of net loss	56	1,509	1,559
Total	6,962	(24,466)	(526)
Total recognized as net periodic benefit cost, regulatory asset, and/or AOCI (before tax)	5,507	(21,841)	3,660
Prior service cost	(709)	(709)	38
Net loss	470	56	1,587
Entergy New Orleans [Member] | Non-Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net periodic pension costs	95	92	79
Entergy New Orleans [Member] | Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	2,666	3,264	2,824
Interest cost	8,164	7,462	7,608
Expected return on assets	(10,019)	(9,117)	(8,860)
Amortization of prior credit	0	2	7
Recognized net loss	5,796	7,878	6,878
Curtailment loss		343
Special termination benefit		581
Net periodic pension costs	6,607	10,413	8,457
Net (gain)/loss	38,161	(25,419)	14,282
Amortization of prior service cost/(credit)	0	(2)	(7)
Amortization of net loss	5,796	7,878	6,878
Total	32,365	(33,299)	7,397
Total recognized as net periodic benefit cost, regulatory asset, and/or AOCI (before tax)	38,972	(22,886)	15,854
Prior service cost		0	2
Net loss	8,053	5,802	8,046
Entergy Texas [Member] | Other Postretirement [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	2,378	3,760	3,651
Interest cost	5,652	6,076	6,650
Expected return on assets	(10,358)	(9,391)	(8,415)
Amortization of transition obligation			187
Amortization of prior credit	(1,300)	(501)	(428)
Recognized net loss	801	3,744	4,320
Curtailment loss		1,436
Net periodic pension costs	(2,827)	5,124	5,965
Prior service credit for period	(8,536)	(5,359)
Net (gain)/loss	24,482	(34,562)	191
Amortization of transition obligation			187
Amortization of prior service cost/(credit)	1,300	501	428
Acceleration of prior service cost due to curtailment		62
Amortization of net loss	801	3,744	4,320
Total	16,445	(43,102)	(3,888)
Total recognized as net periodic benefit cost, regulatory asset, and/or AOCI (before tax)	13,618	(37,978)	2,077
Prior service cost	(2,723)	(1,301)	(428)
Net loss	2,740	800	3,905
Entergy Texas [Member] | Non-Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net periodic pension costs	491	1,001	648
Entergy Texas [Member] | Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	5,142	6,475	5,684
Interest cost	17,746	16,303	16,823
Expected return on assets	(23,723)	(22,277)	(22,325)
Amortization of prior credit	0	6	15
Recognized net loss	9,356	13,302	10,179
Curtailment loss		1,559
Special termination benefit		855
Net periodic pension costs	8,521	16,223	10,376
Net (gain)/loss	65,363	(55,772)	28,745
Amortization of prior service cost/(credit)	0	(6)	(15)
Amortization of net loss	9,356	13,302	10,179
Total	56,007	(69,080)	18,551
Total recognized as net periodic benefit cost, regulatory asset, and/or AOCI (before tax)	64,528	(52,857)	28,927
Prior service cost		0	6
Net loss	12,950	9,363	13,494
System Energy [Member] | Other Postretirement [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	2,058	3,580	3,293
Interest cost	2,611	2,945	3,028
Expected return on assets	(3,727)	(3,350)	(2,601)
Amortization of transition obligation			8
Amortization of prior credit	(824)	(126)	(63)
Recognized net loss	443	1,896	1,970
Curtailment loss		760
Net periodic pension costs	561	5,705	5,635
Prior service credit for period	(3,845)	(4,591)
Net (gain)/loss	10,596	(17,579)	2,043
Amortization of transition obligation			8
Amortization of prior service cost/(credit)	824	126	63
Acceleration of prior service cost due to curtailment		9
Amortization of net loss	443	1,896	1,970
Total	7,132	(23,931)	128
Total recognized as net periodic benefit cost, regulatory asset, and/or AOCI (before tax)	7,693	(18,226)	5,763
Prior service cost	(1,465)	(824)	(62)
Net loss	1,198	464	1,915
System Energy [Member] | Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	5,785	7,242	5,920
Interest cost	13,561	12,170	12,987
Expected return on assets	(16,619)	(17,249)	(16,436)
Amortization of prior credit	2	9	13
Recognized net loss	9,500	9,560	9,001
Curtailment loss		0
Special termination benefit		1,970
Net periodic pension costs	12,229	13,702	11,485
Net (gain)/loss	60,763	(35,511)	10,266
Amortization of prior service cost/(credit)	(2)	(9)	(13)
Amortization of net loss	9,500	9,560	9,001
Total	51,261	(45,080)	1,252
Total recognized as net periodic benefit cost, regulatory asset, and/or AOCI (before tax)	63,490	(31,378)	12,737
Prior service cost		2	10
Net loss	$ 13,055	$ 9,510	$ 9,717