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v3.25.1

Retirement And Other Postretirement Benefits (Schedule of Net Benefit Costs) (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Pension Plan [Member] | Qualified Plan |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined Benefit Plan, Service Cost | $ 23,617 | $ 23,376
Defined Benefit Plan, Interest Cost | 59,680 | 70,626
Defined Benefit Plan, Expected Return (Loss) on Plan Assets | (75,280) | (95,980)
Defined Benefit Plan, Amortization of Gain (Loss) | 13,309 | 15,120
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total | 21,326 | 13,142
Pension Plan [Member] | Entergy Arkansas [Member] | Qualified Plan |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined Benefit Plan, Service Cost | 4,427 | 4,099
Defined Benefit Plan, Interest Cost | 13,814 | 13,217
Defined Benefit Plan, Expected Return (Loss) on Plan Assets | (17,676) | (18,155)
Defined Benefit Plan, Amortization of Gain (Loss) | 4,791 | 5,746
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total | 5,356 | 4,907
Pension Plan [Member] | Entergy Louisiana [Member] | Qualified Plan |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined Benefit Plan, Service Cost | 5,454 | 5,551
Defined Benefit Plan, Interest Cost | 14,704 | 13,961
Defined Benefit Plan, Expected Return (Loss) on Plan Assets | (18,897) | (19,447)
Defined Benefit Plan, Amortization of Gain (Loss) | 2,268 | 2,602
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total | 3,529 | 2,667
Pension Plan [Member] | Entergy Mississippi [Member] | Qualified Plan |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined Benefit Plan, Service Cost | 1,304 | 1,284
Defined Benefit Plan, Interest Cost | 3,699 | 3,521
Defined Benefit Plan, Expected Return (Loss) on Plan Assets | (4,949) | (5,113)
Defined Benefit Plan, Amortization of Gain (Loss) | 822 | 1,140
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total | 876 | 832
Pension Plan [Member] | Entergy New Orleans [Member] | Qualified Plan |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined Benefit Plan, Service Cost | 411 | 440
Defined Benefit Plan, Interest Cost | 1,647 | 1,569
Defined Benefit Plan, Expected Return (Loss) on Plan Assets | (2,174) | (2,204)
Defined Benefit Plan, Amortization of Gain (Loss) | 415 | 470
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total | 299 | 275
Pension Plan [Member] | Entergy Texas [Member] | Qualified Plan |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined Benefit Plan, Service Cost | 1,024 | 961
Defined Benefit Plan, Interest Cost | 2,973 | 2,831
Defined Benefit Plan, Expected Return (Loss) on Plan Assets | (3,889) | (4,077)
Defined Benefit Plan, Amortization of Gain (Loss) | 454 | 393
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total | 562 | 108
Pension Plan [Member] | System Energy [Member] | Qualified Plan |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined Benefit Plan, Service Cost | 1,372 | 1,384
Defined Benefit Plan, Interest Cost | 3,585 | 3,391
Defined Benefit Plan, Expected Return (Loss) on Plan Assets | (4,575) | (4,648)
Defined Benefit Plan, Amortization of Gain (Loss) | 1,114 | 1,165
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total | 1,496 | 1,292
Other Postretirement Benefits Plan [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined Benefit Plan, Service Cost | 2,757 | 3,126
Defined Benefit Plan, Interest Cost | 9,690 | 9,852
Defined Benefit Plan, Expected Return (Loss) on Plan Assets | (10,209) | (10,569)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit) | (5,720) | (5,720)
Defined Benefit Plan, Amortization of Gain (Loss) | (3,870) | (2,761)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total | (7,352) | (6,072)
Other Postretirement Benefits Plan [Member] | Entergy Arkansas [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined Benefit Plan, Service Cost | 572 | 642
Defined Benefit Plan, Interest Cost | 1,775 | 1,833
Defined Benefit Plan, Expected Return (Loss) on Plan Assets | (4,225) | (4,384)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit) | 524 | 524
Defined Benefit Plan, Amortization of Gain (Loss) | (353) | 0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total | (1,707) | (1,385)
Other Postretirement Benefits Plan [Member] | Entergy Louisiana [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined Benefit Plan, Service Cost | 671 | 700
Defined Benefit Plan, Interest Cost | 2,012 | 1,999
Defined Benefit Plan, Expected Return (Loss) on Plan Assets | 0 | 0
Defined Benefit Plan, Amortization of Prior Service Cost (Credit) | (1,136) | (1,136)
Defined Benefit Plan, Amortization of Gain (Loss) | (1,811) | (1,738)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total | (264) | (175)
Other Postretirement Benefits Plan [Member] | Entergy Mississippi [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined Benefit Plan, Service Cost | 162 | 184
Defined Benefit Plan, Interest Cost | 489 | 486
Defined Benefit Plan, Expected Return (Loss) on Plan Assets | (1,328) | (1,372)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit) | (239) | (239)
Defined Benefit Plan, Amortization of Gain (Loss) | (57) | 15
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total | (973) | (926)
Other Postretirement Benefits Plan [Member] | Entergy New Orleans [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined Benefit Plan, Service Cost | 52 | 51
Defined Benefit Plan, Interest Cost | 249 | 253
Defined Benefit Plan, Expected Return (Loss) on Plan Assets | (1,445) | (1,479)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit) | (229) | (229)
Defined Benefit Plan, Amortization of Gain (Loss) | (27) | 19
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total | (1,400) | (1,385)
Other Postretirement Benefits Plan [Member] | Entergy Texas [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined Benefit Plan, Service Cost | 159 | 168
Defined Benefit Plan, Interest Cost | 582 | 603
Defined Benefit Plan, Expected Return (Loss) on Plan Assets | (2,452) | (2,539)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit) | (1,093) | (1,093)
Defined Benefit Plan, Amortization of Gain (Loss) | 153 | 148
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total | (2,651) | (2,713)
Other Postretirement Benefits Plan [Member] | System Energy [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined Benefit Plan, Service Cost | 174 | 175
Defined Benefit Plan, Interest Cost | 394 | 398
Defined Benefit Plan, Expected Return (Loss) on Plan Assets | (702) | (728)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit) | (73) | (73)
Defined Benefit Plan, Amortization of Gain (Loss) | (7) | 0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total | $ (214) | $ (228)

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