Retirement, Other Postretirement Benefits, And Defined Contribution Plans (Schedule Of Net Periodic Pension Cost) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	$ 27,129	$ 26,915	$ 32,291
Interest cost	50,725	55,838	56,331
Expected return on assets	(41,493)	(37,630)	(41,820)
Amortization of prior service credit	(37,002)	(41,425)	(45,490)
Recognized net loss	13,729	21,905	18,214
Net periodic pension costs	13,088	25,603	19,526
Prior service credit for period	0	(2,564)	(20,353)
Net loss	(274,354)	(66,922)	49,805
Amortization of prior service cost/(credit)	37,002	41,425	45,490
Amortization of net loss	13,729	21,905	18,214
Total	(251,081)	(49,966)	56,728
Total recognized as net periodic benefit cost, regulatory asset, and/or AOCI (before tax)	(237,993)	(24,363)	76,254
Prior service cost	(35,377)	(37,002)	(41,425)
Net loss	1,430	13,729	21,905
Non-Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated pension benefit obligation	131,900	144,700
Amortization of prior service credit	51,900	55,200
Net periodic pension costs	24,400	37,600	24,900
Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated pension benefit obligation	6,900,000	7,400,000
Service cost - benefits earned during the period	155,010	133,641	143,244
Interest cost	267,415	260,824	261,613
Expected return on assets	(442,142)	(408,225)	(389,465)
Amortization of prior service credit	398	261	1,079
Recognized net loss	274,104	227,720	195,298
Curtailment loss	0	0	3,084
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Remeasurement due to Settlement	828	0	0
Net periodic pension costs	255,613	214,221	214,853
Net loss	394,951	368,067	203,229
Amortization of prior service cost/(credit)	(398)	(261)	(1,079)
Acceleration of prior service cost due to curtailment	0	0	(1,045)
Amortization of net loss	274,932	227,720	195,298
Total	119,621	140,086	5,807
Total recognized as net periodic benefit cost, regulatory asset, and/or AOCI (before tax)	375,234	354,307	220,660
Prior service cost	0	398	261
Net loss	233,677	274,104	227,720
Entergy Arkansas [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	3,170	3,451	3,913
Interest cost	7,986	9,020	9,297
Expected return on assets	(17,368)	(15,836)	(17,855)
Amortization of prior service credit	(5,110)	(5,110)	(5,472)
Recognized net loss	1,154	4,460	4,256
Net periodic pension costs	(10,168)	(4,015)	(5,861)
Prior service credit for period			(1,007)
Net loss	(32,219)	(29,534)	3,331
Amortization of prior service cost/(credit)	5,110	5,110	5,472
Amortization of net loss	1,154	4,460	4,256
Total	(28,263)	(28,884)	3,540
Total recognized as net periodic benefit cost, regulatory asset, and/or AOCI (before tax)	(38,431)	(32,899)	(2,321)
Prior service cost	(4,950)	(5,110)	(5,110)
Net loss	576	1,154	4,460
Entergy Arkansas [Member] | Non-Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated pension benefit obligation	2,519	3,825
Net periodic pension costs	474	679	1,819
Entergy Arkansas [Member] | Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated pension benefit obligation	1,362,425	1,492,876
Service cost - benefits earned during the period	24,757	20,358	20,724
Interest cost	52,017	51,776	52,219
Expected return on assets	(87,404)	(81,707)	(79,087)
Recognized net loss	53,650	46,560	43,745
Net periodic pension costs	43,020	36,987	37,601
Net loss	74,570	51,569	60,968
Amortization of net loss	53,650	46,560	43,745
Total	20,920	5,009	17,223
Total recognized as net periodic benefit cost, regulatory asset, and/or AOCI (before tax)	63,940	41,996	54,824
Net loss	47,361	53,650	46,560
Entergy Louisiana [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	6,225	6,373	7,476
Interest cost	11,154	12,101	13,041
Expected return on assets	0	0	0
Amortization of prior service credit	(7,735)	(7,735)	(7,787)
Recognized net loss	1,550	1,859	2,926
Net periodic pension costs	11,194	12,598	15,656
Prior service credit for period			(4,647)
Net loss	(73,249)	(1,256)	(13,117)
Amortization of prior service cost/(credit)	7,735	7,735	7,787
Amortization of net loss	1,550	1,859	2,926
Total	(67,064)	4,620	(12,903)
Total recognized as net periodic benefit cost, regulatory asset, and/or AOCI (before tax)	(55,870)	17,218	2,753
Prior service cost	(7,349)	(7,735)	(7,739)
Net loss	(695)	1,550	1,859
Entergy Louisiana [Member] | Non-Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated pension benefit obligation	1,881	2,061
Net periodic pension costs	180	185	231
Entergy Louisiana [Member] | Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated pension benefit obligation	1,481,158	1,652,939
Service cost - benefits earned during the period	33,783	27,698	28,194
Interest cost	59,761	59,235	59,478
Expected return on assets	(99,236)	(92,067)	(88,383)
Recognized net loss	57,800	49,417	47,783
Net periodic pension costs	52,108	44,283	47,072
Net loss	41,642	57,510	46,742
Amortization of net loss	57,800	49,417	47,783
Total	(16,158)	8,093	(1,041)
Total recognized as net periodic benefit cost, regulatory asset, and/or AOCI (before tax)	35,950	52,376	46,031
Net loss	46,571	57,800	49,417
Entergy Mississippi [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	1,284	1,160	1,543
Interest cost	2,731	2,759	2,835
Expected return on assets	(5,213)	(4,801)	(5,517)
Amortization of prior service credit	(1,823)	(1,823)	(934)
Recognized net loss	1,508	1,675	893
Net periodic pension costs	(1,513)	(1,030)	(1,180)
Prior service credit for period			(6,219)
Net loss	(7,794)	506	8,715
Amortization of prior service cost/(credit)	1,823	1,823	934
Amortization of net loss	1,508	1,675	893
Total	(7,479)	654	2,537
Total recognized as net periodic benefit cost, regulatory asset, and/or AOCI (before tax)	(8,992)	(376)	1,357
Prior service cost	(1,756)	(1,823)	(1,824)
Net loss	723	1,508	1,675
Entergy Mississippi [Member] | Non-Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated pension benefit obligation	2,427	2,250
Net periodic pension costs	300	251	236
Entergy Mississippi [Member] | Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated pension benefit obligation	387,635	430,268
Service cost - benefits earned during the period	7,286	5,890	6,250
Interest cost	15,075	14,927	15,245
Expected return on assets	(26,007)	(24,526)	(23,923)
Recognized net loss	14,438	12,213	11,938
Net periodic pension costs	10,792	8,504	9,510
Net loss	19,244	14,681	10,942
Amortization of net loss	14,438	12,213	11,938
Total	4,806	2,468	(996)
Total recognized as net periodic benefit cost, regulatory asset, and/or AOCI (before tax)	15,598	10,972	8,514
Net loss	12,416	14,438	12,213
Entergy New Orleans [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	516	567	622
Interest cost	1,669	1,874	1,791
Expected return on assets	(5,250)	(4,635)	(4,617)
Amortization of prior service credit	(745)	(745)	(745)
Recognized net loss	137	418	146
Net periodic pension costs	(3,673)	(2,521)	(2,803)
Prior service credit for period			0
Net loss	(981)	(7,342)	5,717
Amortization of prior service cost/(credit)	745	745	745
Amortization of net loss	137	418	146
Total	(373)	(7,015)	6,316
Total recognized as net periodic benefit cost, regulatory asset, and/or AOCI (before tax)	(4,046)	(9,536)	3,513
Prior service cost	(682)	(745)	(745)
Net loss	231	137	418
Entergy New Orleans [Member] | Non-Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated pension benefit obligation	206	519
Net periodic pension costs	81	73	65
Entergy New Orleans [Member] | Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated pension benefit obligation	179,907	205,316
Service cost - benefits earned during the period	2,693	2,500	2,625
Interest cost	7,253	7,163	7,256
Expected return on assets	(11,973)	(11,199)	(10,748)
Recognized net loss	7,816	6,632	6,460
Net periodic pension costs	5,789	5,096	5,593
Net loss	2,351	8,601	5,463
Amortization of net loss	7,816	6,632	6,460
Total	(5,465)	1,969	(997)
Total recognized as net periodic benefit cost, regulatory asset, and/or AOCI (before tax)	324	7,065	4,596
Net loss	6,117	7,816	6,632
Entergy Texas [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	1,319	1,488	1,590
Interest cost	3,754	4,494	4,154
Expected return on assets	(9,784)	(8,720)	(9,575)
Amortization of prior service credit	(2,316)	(2,316)	(2,722)
Recognized net loss	823	3,303	2,148
Net periodic pension costs	(6,204)	(1,751)	(4,405)
Prior service credit for period			0
Net loss	(10,561)	(22,255)	13,378
Amortization of prior service cost/(credit)	2,316	2,316	2,722
Amortization of net loss	823	3,303	2,148
Total	(9,068)	(23,242)	13,952
Total recognized as net periodic benefit cost, regulatory asset, and/or AOCI (before tax)	(15,272)	(24,993)	9,547
Prior service cost	(2,243)	(2,316)	(2,316)
Net loss	485	823	3,303
Entergy Texas [Member] | Non-Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated pension benefit obligation	7,724	8,602
Net periodic pension costs	650	499	504
Entergy Texas [Member] | Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated pension benefit obligation	347,852	387,083
Service cost - benefits earned during the period	6,356	5,455	5,664
Interest cost	13,390	13,569	14,228
Expected return on assets	(26,091)	(24,722)	(24,248)
Recognized net loss	10,503	9,241	9,358
Net periodic pension costs	4,158	3,543	5,002
Net loss	24,121	1,109	3,816
Amortization of net loss	10,503	9,241	9,358
Total	13,618	(8,132)	(5,542)
Total recognized as net periodic benefit cost, regulatory asset, and/or AOCI (before tax)	17,776	(4,589)	(540)
Net loss	9,335	10,503	9,241
System Energy [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	1,223	1,278	1,337
Interest cost	1,998	2,236	2,117
Expected return on assets	(3,130)	(2,869)	(3,257)
Amortization of prior service credit	(1,513)	(1,513)	(1,570)
Recognized net loss	932	1,560	1,149
Net periodic pension costs	(490)	692	(224)
Prior service credit for period			0
Net loss	(6,680)	(5,459)	4,997
Amortization of prior service cost/(credit)	1,513	1,513	1,570
Amortization of net loss	932	1,560	1,149
Total	(6,099)	(5,506)	5,418
Total recognized as net periodic benefit cost, regulatory asset, and/or AOCI (before tax)	(6,589)	(4,814)	5,194
Prior service cost	(1,450)	(1,513)	(1,513)
Net loss	354	932	1,560
System Energy [Member] | Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated pension benefit obligation	317,848	359,258
Service cost - benefits earned during the period	7,102	6,145	6,263
Interest cost	12,907	12,364	11,966
Expected return on assets	(19,963)	(18,650)	(17,836)
Recognized net loss	14,859	11,857	10,415
Net periodic pension costs	14,905	11,716	10,808
Net loss	(2,359)	27,733	20,805
Amortization of net loss	14,859	11,857	10,415
Total	(17,218)	15,876	10,390
Total recognized as net periodic benefit cost, regulatory asset, and/or AOCI (before tax)	(2,313)	27,592	21,198
Net loss	$ 11,400	$ 14,859	$ 11,857