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Retirement And Other Postretirement Benefits (Schedule of Net Benefit Costs) (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Pension Plan [Member] | Qualified Plan        
Defined Benefit Plan Disclosure [Line Items]        
Defined Benefit Plan, Service Cost $ 23,358,000 $ 25,302,000 $ 70,104,000 $ 76,346,000
Defined Benefit Plan, Interest Cost 56,631,000 73,850,000 193,218,000 223,584,000
Defined Benefit Plan, Expected Return (Loss) on Plan Assets (76,557,000) (96,775,000) (262,043,000) (290,660,000)
Defined Benefit Plan, Amortization of Gain (Loss) 14,322,000 20,204,000 44,296,000 63,858,000
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement 0 (6,914,000) (325,253,000) (152,588,000)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total 17,754,000 29,495,000 370,828,000 225,716,000
Pension Plan [Member] | Nonqualified Plan        
Defined Benefit Plan Disclosure [Line Items]        
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement 0 18,000,000 0 27,300,000
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total 2,700,000 21,800,000 8,200,000 39,800,000
Pension Plan [Member] | Entergy Arkansas [Member] | Qualified Plan        
Defined Benefit Plan Disclosure [Line Items]        
Defined Benefit Plan, Service Cost 4,101,000 4,566,000 12,300,000 13,976,000
Defined Benefit Plan, Interest Cost 13,218,000 13,813,000 39,652,000 42,010,000
Defined Benefit Plan, Expected Return (Loss) on Plan Assets (18,156,000) (17,639,000) (54,466,000) (53,593,000)
Defined Benefit Plan, Amortization of Gain (Loss) 5,745,000 5,438,000 17,237,000 18,170,000
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement   (558,000) 0 (24,516,000)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total 4,908,000 6,736,000 14,723,000 45,079,000
Pension Plan [Member] | Entergy Arkansas [Member] | Nonqualified Plan        
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 63,000 204,000 575,000
Pension Plan [Member] | Entergy Louisiana [Member] | Qualified Plan        
Defined Benefit Plan Disclosure [Line Items]        
Defined Benefit Plan, Service Cost 5,550,000 6,175,000 16,652,000 18,654,000
Defined Benefit Plan, Interest Cost 13,962,000 14,896,000 41,884,000 45,219,000
Defined Benefit Plan, Expected Return (Loss) on Plan Assets (19,446,000) (18,892,000) (58,340,000) (56,891,000)
Defined Benefit Plan, Amortization of Gain (Loss) 2,601,000 4,748,000 7,805,000 14,704,000
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement   (561,000) 0 (38,791,000)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total 2,667,000 7,488,000 8,001,000 60,477,000
Pension Plan [Member] | Entergy Louisiana [Member] | Nonqualified Plan        
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 24,000 153,000 76,000
Pension Plan [Member] | Entergy Mississippi [Member] | Qualified Plan        
Defined Benefit Plan Disclosure [Line Items]        
Defined Benefit Plan, Service Cost 1,284,000 1,431,000 3,852,000 4,369,000
Defined Benefit Plan, Interest Cost 3,522,000 3,797,000 10,564,000 11,551,000
Defined Benefit Plan, Expected Return (Loss) on Plan Assets (5,112,000) (4,830,000) (15,338,000) (14,349,000)
Defined Benefit Plan, Amortization of Gain (Loss) 1,140,000 1,545,000 3,420,000 4,937,000
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement   (345,000) 0 (12,088,000)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total 834,000 2,288,000 2,498,000 18,596,000
Pension Plan [Member] | Entergy Mississippi [Member] | Nonqualified Plan        
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 85,000 249,000 724,000
Pension Plan [Member] | Entergy New Orleans [Member] | Qualified Plan        
Defined Benefit Plan Disclosure [Line Items]        
Defined Benefit Plan, Service Cost 441,000 492,000 1,321,000 1,470,000
Defined Benefit Plan, Interest Cost 1,569,000 1,667,000 4,707,000 5,051,000
Defined Benefit Plan, Expected Return (Loss) on Plan Assets (2,202,000) (2,206,000) (6,609,000) (6,783,000)
Defined Benefit Plan, Amortization of Gain (Loss) 471,000 456,000 1,411,000 1,453,000
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement   (248,000) 0 (1,948,000)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total 279,000 657,000 830,000 3,139,000
Pension Plan [Member] | Entergy New Orleans [Member] | Nonqualified Plan        
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 93,000 99,000
Pension Plan [Member] | Entergy Texas [Member] | Qualified Plan        
Defined Benefit Plan Disclosure [Line Items]        
Defined Benefit Plan, Service Cost 963,000 1,074,000 2,886,000 3,271,000
Defined Benefit Plan, Interest Cost 2,832,000 3,138,000 8,494,000 9,542,000
Defined Benefit Plan, Expected Return (Loss) on Plan Assets (4,077,000) (4,147,000) (12,231,000) (12,322,000)
Defined Benefit Plan, Amortization of Gain (Loss) 393,000 1,008,000 1,179,000 3,057,000
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement   (632,000) 0 (10,902,000)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total 111,000 1,705,000 328,000 14,450,000
Pension Plan [Member] | Entergy Texas [Member] | Nonqualified Plan        
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 63,000 186,000 190,000
Pension Plan [Member] | System Energy [Member] | Qualified Plan        
Defined Benefit Plan Disclosure [Line Items]        
Defined Benefit Plan, Service Cost 1,380,000 1,430,000 4,147,000 4,342,000
Defined Benefit Plan, Interest Cost 3,375,000 3,419,000 10,152,000 10,382,000
Defined Benefit Plan, Expected Return (Loss) on Plan Assets (4,602,000) (4,392,000) (13,883,000) (13,431,000)
Defined Benefit Plan, Amortization of Gain (Loss) 1,155,000 1,204,000 3,482,000 3,939,000
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement   (228,000) (611,000) (5,518,000)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total 1,308,000 1,889,000 4,509,000 10,750,000
Other Postretirement Benefits Plan [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Defined Benefit Plan, Service Cost 3,126,000 3,664,000 9,378,000 10,992,000
Defined Benefit Plan, Interest Cost 9,852,000 10,568,000 29,556,000 31,704,000
Defined Benefit Plan, Expected Return (Loss) on Plan Assets (10,569,000) (9,183,000) (31,707,000) (27,549,000)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit) (5,720,000) (5,640,000) (17,160,000) (16,920,000)
Defined Benefit Plan, Amortization of Gain (Loss) (2,761,000) (2,862,000) (8,283,000) (8,586,000)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total (6,072,000) (3,453,000) (18,216,000) (10,359,000)
Other Postretirement Benefits Plan [Member] | Entergy Arkansas [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Defined Benefit Plan, Service Cost 642,000 741,000 1,926,000 2,223,000
Defined Benefit Plan, Interest Cost 1,833,000 2,001,000 5,499,000 6,003,000
Defined Benefit Plan, Expected Return (Loss) on Plan Assets (4,384,000) (3,778,000) (13,152,000) (11,334,000)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit) 524,000 524,000 1,572,000 1,572,000
Defined Benefit Plan, Amortization of Gain (Loss) 0 43,000 0 129,000
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total (1,385,000) (469,000) (4,155,000) (1,407,000)
Other Postretirement Benefits Plan [Member] | Entergy Louisiana [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Defined Benefit Plan, Service Cost 700,000 845,000 2,100,000 2,535,000
Defined Benefit Plan, Interest Cost 1,999,000 2,233,000 5,997,000 6,699,000
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) (3,408,000) (2,853,000)
Defined Benefit Plan, Amortization of Gain (Loss) (1,738,000) (1,764,000) (5,214,000) (5,292,000)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total (175,000) 363,000 (525,000) 1,089,000
Other Postretirement Benefits Plan [Member] | Entergy Mississippi [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Defined Benefit Plan, Service Cost 184,000 220,000 552,000 660,000
Defined Benefit Plan, Interest Cost 486,000 543,000 1,458,000 1,629,000
Defined Benefit Plan, Expected Return (Loss) on Plan Assets (1,372,000) (1,179,000) (4,116,000) (3,537,000)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit) (239,000) (239,000) (717,000) (717,000)
Defined Benefit Plan, Amortization of Gain (Loss) 15,000 21,000 45,000 63,000
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total (926,000) (634,000) (2,778,000) (1,902,000)
Other Postretirement Benefits Plan [Member] | Entergy New Orleans [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Defined Benefit Plan, Service Cost 51,000 59,000 153,000 177,000
Defined Benefit Plan, Interest Cost 253,000 290,000 759,000 870,000
Defined Benefit Plan, Expected Return (Loss) on Plan Assets (1,479,000) (1,316,000) (4,437,000) (3,948,000)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit) (229,000) (229,000) (687,000) (687,000)
Defined Benefit Plan, Amortization of Gain (Loss) 19,000 117,000 57,000 351,000
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total (1,385,000) (1,079,000) (4,155,000) (3,237,000)
Other Postretirement Benefits Plan [Member] | Entergy Texas [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Defined Benefit Plan, Service Cost 168,000 202,000 504,000 606,000
Defined Benefit Plan, Interest Cost 603,000 649,000 1,809,000 1,947,000
Defined Benefit Plan, Expected Return (Loss) on Plan Assets (2,539,000) (2,194,000) (7,617,000) (6,582,000)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit) (1,093,000) (1,093,000) (3,279,000) (3,279,000)
Defined Benefit Plan, Amortization of Gain (Loss) 148,000 229,000 444,000 687,000
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total (2,713,000) (2,207,000) (8,139,000) (6,621,000)
Other Postretirement Benefits Plan [Member] | System Energy [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Defined Benefit Plan, Service Cost 175,000 189,000 525,000 567,000
Defined Benefit Plan, Interest Cost 398,000 432,000 1,194,000 1,296,000
Defined Benefit Plan, Expected Return (Loss) on Plan Assets (728,000) (634,000) (2,184,000) (1,902,000)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit) (73,000) (73,000) (219,000) (219,000)
Defined Benefit Plan, Amortization of Gain (Loss) 0 0 0 0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total $ (228,000) $ (86,000) $ (684,000) $ (258,000)