Retirement And Other Postretirement Benefits (Schedule of Net Benefit Costs) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	$ 3,126,000	$ 3,664,000	$ 6,252,000	$ 7,328,000
Defined Benefit Plan, Interest Cost	9,852,000	10,568,000	19,704,000	21,136,000
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(10,569,000)	(9,183,000)	(21,138,000)	(18,366,000)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(5,720,000)	(5,640,000)	(11,440,000)	(11,280,000)
Defined Benefit Plan, Amortization of Gain (Loss)	(2,761,000)	(2,862,000)	(5,522,000)	(5,724,000)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	(6,072,000)	(3,453,000)	(12,144,000)	(6,906,000)
Other Postretirement Benefits Plan [Member] | Entergy Arkansas [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	642,000	741,000	1,284,000	1,482,000
Defined Benefit Plan, Interest Cost	1,833,000	2,001,000	3,666,000	4,002,000
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(4,384,000)	(3,778,000)	(8,768,000)	(7,556,000)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	524,000	524,000	1,048,000	1,048,000
Defined Benefit Plan, Amortization of Gain (Loss)	0	43,000	0	86,000
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	(1,385,000)	(469,000)	(2,770,000)	(938,000)
Other Postretirement Benefits Plan [Member] | Entergy Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	700,000	845,000	1,400,000	1,690,000
Defined Benefit Plan, Interest Cost	1,999,000	2,233,000	3,998,000	4,466,000
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	0	0	0	0
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(1,136,000)	(951,000)	(2,272,000)	(1,902,000)
Defined Benefit Plan, Amortization of Gain (Loss)	(1,738,000)	(1,764,000)	(3,476,000)	(3,528,000)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	(175,000)	363,000	(350,000)	726,000
Other Postretirement Benefits Plan [Member] | Entergy Mississippi [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	184,000	220,000	368,000	440,000
Defined Benefit Plan, Interest Cost	486,000	543,000	972,000	1,086,000
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(1,372,000)	(1,179,000)	(2,744,000)	(2,358,000)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(239,000)	(239,000)	(478,000)	(478,000)
Defined Benefit Plan, Amortization of Gain (Loss)	15,000	21,000	30,000	42,000
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	(926,000)	(634,000)	(1,852,000)	(1,268,000)
Other Postretirement Benefits Plan [Member] | Entergy New Orleans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	51,000	59,000	102,000	118,000
Defined Benefit Plan, Interest Cost	253,000	290,000	506,000	580,000
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(1,479,000)	(1,316,000)	(2,958,000)	(2,632,000)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(229,000)	(229,000)	(458,000)	(458,000)
Defined Benefit Plan, Amortization of Gain (Loss)	19,000	117,000	38,000	234,000
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	(1,385,000)	(1,079,000)	(2,770,000)	(2,158,000)
Other Postretirement Benefits Plan [Member] | Entergy Texas [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	168,000	202,000	336,000	404,000
Defined Benefit Plan, Interest Cost	603,000	649,000	1,206,000	1,298,000
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(2,539,000)	(2,194,000)	(5,078,000)	(4,388,000)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(1,093,000)	(1,093,000)	(2,186,000)	(2,186,000)
Defined Benefit Plan, Amortization of Gain (Loss)	148,000	229,000	296,000	458,000
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	(2,713,000)	(2,207,000)	(5,426,000)	(4,414,000)
Other Postretirement Benefits Plan [Member] | System Energy [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	175,000	189,000	350,000	378,000
Defined Benefit Plan, Interest Cost	398,000	432,000	796,000	864,000
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(728,000)	(634,000)	(1,456,000)	(1,268,000)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(73,000)	(73,000)	(146,000)	(146,000)
Defined Benefit Plan, Amortization of Gain (Loss)	0	0	0	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	(228,000)	(86,000)	(456,000)	(172,000)
Non Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement	0	4,600,000	0	9,300,000
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	2,700,000	8,800,000	5,400,000	18,000,000
Non Qualified Pension Plans [Member] | Entergy Arkansas [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement	0	0	0	379,000
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	68,000	63,000	136,000	513,000
Non Qualified Pension Plans [Member] | Entergy Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement	0	0	0	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	51,000	25,000	102,000	52,000
Non Qualified Pension Plans [Member] | Entergy Mississippi [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement	0	0	0	453,000
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	83,000	87,000	166,000	639,000
Non Qualified Pension Plans [Member] | Entergy New Orleans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement	0	0	0	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	31,000	33,000	61,000	66,000
Non Qualified Pension Plans [Member] | Entergy Texas [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement	0	0	0	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	62,000	63,000	124,000	126,000
Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	23,370,000	25,366,000	46,746,000	51,044,000
Defined Benefit Plan, Interest Cost	65,961,000	74,033,000	136,587,000	149,734,000
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(89,506,000)	(95,752,000)	(185,486,000)	(193,885,000)
Defined Benefit Plan, Amortization of Gain (Loss)	14,854,000	21,307,000	29,974,000	43,654,000
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement	(325,253,000)	(7,246,000)	(325,253,000)	(145,674,000)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	339,932,000	32,200,000	353,074,000	196,221,000
Qualified Pension Plans [Member] | Entergy Arkansas [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	4,100,000	4,661,000	8,199,000	9,410,000
Defined Benefit Plan, Interest Cost	13,217,000	13,917,000	26,434,000	28,197,000
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(18,155,000)	(17,878,000)	(36,310,000)	(35,954,000)
Defined Benefit Plan, Amortization of Gain (Loss)	5,746,000	5,763,000	11,492,000	12,732,000
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement	0	(1,784,000)	0	(23,958,000)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	4,908,000	8,247,000	9,815,000	38,343,000
Qualified Pension Plans [Member] | Entergy Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	5,551,000	6,199,000	11,102,000	12,479,000
Defined Benefit Plan, Interest Cost	13,961,000	14,944,000	27,922,000	30,323,000
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(19,447,000)	(18,766,000)	(38,894,000)	(37,999,000)
Defined Benefit Plan, Amortization of Gain (Loss)	2,602,000	4,992,000	5,204,000	9,956,000
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement	0	(2,232,000)	0	(38,230,000)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	2,667,000	9,601,000	5,334,000	52,989,000
Qualified Pension Plans [Member] | Entergy Mississippi [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	1,284,000	1,456,000	2,568,000	2,938,000
Defined Benefit Plan, Interest Cost	3,521,000	3,824,000	7,042,000	7,754,000
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(5,113,000)	(4,635,000)	(10,226,000)	(9,519,000)
Defined Benefit Plan, Amortization of Gain (Loss)	1,140,000	1,627,000	2,280,000	3,392,000
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement	0	(88,000)	0	(11,743,000)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	832,000	2,360,000	1,664,000	16,308,000
Qualified Pension Plans [Member] | Entergy New Orleans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	440,000	487,000	880,000	978,000
Defined Benefit Plan, Interest Cost	1,569,000	1,669,000	3,138,000	3,384,000
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(2,203,000)	(2,310,000)	(4,407,000)	(4,577,000)
Defined Benefit Plan, Amortization of Gain (Loss)	470,000	484,000	940,000	997,000
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement	0	(7,000)	0	(1,700,000)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	276,000	337,000	551,000	2,482,000
Qualified Pension Plans [Member] | Entergy Texas [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	962,000	1,090,000	1,923,000	2,197,000
Defined Benefit Plan, Interest Cost	2,831,000	3,162,000	5,662,000	6,404,000
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(4,077,000)	(4,023,000)	(8,154,000)	(8,175,000)
Defined Benefit Plan, Amortization of Gain (Loss)	393,000	1,059,000	786,000	2,049,000
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement	0	(592,000)	0	(10,270,000)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	109,000	1,880,000	217,000	12,745,000
Qualified Pension Plans [Member] | System Energy [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	1,383,000	1,445,000	2,767,000	2,912,000
Defined Benefit Plan, Interest Cost	3,386,000	3,435,000	6,777,000	6,963,000
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(4,633,000)	(4,501,000)	(9,281,000)	(9,039,000)
Defined Benefit Plan, Amortization of Gain (Loss)	1,162,000	1,274,000	2,327,000	2,735,000
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement	(611,000)	(490,000)	(611,000)	(5,290,000)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	$ 1,909,000	$ 2,143,000	$ 3,201,000	$ 8,861,000