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Retirement And Other Postretirement Benefits (Schedule of reclassifications out of accumulated other comprehensive income) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax | $ 5,323 | $ 5,603 | $ 17,349 | $ (301,388)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax | (3,463) | (3,473) | (10,387) | (10,419)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax | 2,265 | 2,130 | 7,367 | 5,167
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement Gain (Loss), Reclassification Adjustment from AOCI, before Tax | (405) |  | (405) | (316,974)
Entergy Louisiana [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax | 2,436 | 2,770 | 8,146 | 8,308
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax | (1,136) | (1,136) | (3,408) | (3,408)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax | 1,406 | 1,634 | 4,844 | 4,900
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement Gain (Loss), Reclassification Adjustment from AOCI, before Tax | (106) |  | (106) |
Pension Plan [Member] | Nonqualified Plan |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax | (372) | (120) | (650) | (360)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax | 31 | 40 | 93 | 120
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax | (103) | (80) | (319) | (240)
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement Gain (Loss), Reclassification Adjustment from AOCI, before Tax | (238) |  | (238) | 0
Pension Plan [Member] | Qualified Plan |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax | (585) | (405) | (1,407) | (319,412)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax | 0 | 0 | 0 | 0
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax | (418) | (405) | (1,240) | (2,438)
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement Gain (Loss), Reclassification Adjustment from AOCI, before Tax | (167) |  | (167) | (316,974)
Pension Plan [Member] | Entergy Louisiana [Member] | Nonqualified Plan |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax | 0 | 0 | (2) | (2)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax | 0 | 0 | 0 | 0
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax | 0 | 0 | (2) | (2)
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement Gain (Loss), Reclassification Adjustment from AOCI, before Tax | 0 |  | 0 |
Pension Plan [Member] | Entergy Louisiana [Member] | Qualified Plan |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax | (200) | (104) | (382) | (312)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax | 0 | 0 | 0 | 0
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax | (94) | (104) | (276) | (312)
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement Gain (Loss), Reclassification Adjustment from AOCI, before Tax | (106) |  | (106) |
Other Postretirement Benefits Plan [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax | 6,280 | 6,128 | 19,406 | 18,384
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax | (3,494) | (3,513) | (10,480) | (10,539)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax | 2,786 | 2,615 | 8,926 | 7,845
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement Gain (Loss), Reclassification Adjustment from AOCI, before Tax | 0 |  | 0 | 0
Other Postretirement Benefits Plan [Member] | Entergy Louisiana [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax | 2,636 | 2,874 | 8,530 | 8,622
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax | (1,136) | (1,136) | (3,408) | (3,408)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax | 1,500 | $ 1,738 | 5,122 | $ 5,214
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement Gain (Loss), Reclassification Adjustment from AOCI, before Tax | $ 0 |  | $ 0 |

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