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Retirement And Other Postretirement Benefits (Narrative) (Details) | 1 Months Ended | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
May 31, 2024 USD ($) | Jun. 30, 2024 USD ($) | Jun. 30, 2023 USD ($) | Jun. 30, 2024 USD ($) | Jun. 30, 2023 USD ($) | Mar. 31, 2024 USD ($)
Entergy Arkansas [Member] |  |  |  |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year |  |  |  |  |  | $ 32,328,000
Defined Benefit Plan, Plan Assets, Contributions by Employer |  |  |  | $ 22,784,000 |  |
Entergy Louisiana [Member] |  |  |  |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year |  |  |  |  |  | 28,539,000
Defined Benefit Plan, Plan Assets, Contributions by Employer |  |  |  | 19,862,000 |  |
Entergy Mississippi [Member] |  |  |  |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year |  |  |  |  |  | 7,740,000
Defined Benefit Plan, Plan Assets, Contributions by Employer |  |  |  | 7,240,000 |  |
Entergy New Orleans [Member] |  |  |  |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year |  |  |  |  |  | 3,432,000
Defined Benefit Plan, Plan Assets, Contributions by Employer |  |  |  | 1,499,000 |  |
Entergy Texas [Member] |  |  |  |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year |  |  |  |  |  | 5,235,000
Defined Benefit Plan, Plan Assets, Contributions by Employer |  |  |  | 3,037,000 |  |
System Energy [Member] |  |  |  |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year |  |  |  |  |  | $ 9,984,000
Defined Benefit Plan, Plan Assets, Contributions by Employer |  |  |  | 6,666,000 |  |
Pension Plan [Member] |  |  |  |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |
Defined Benefit Plan, Plan Assets, Contributions by Employer |  |  |  | 111,400,000 |  |
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year |  | $ 270,000,000 |  | 270,000,000 |  |
Non Qualified Pension Plans [Member] |  |  |  |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) |  | 2,700,000 | $ 8,800,000 | 5,400,000 | $ 18,000,000 |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement |  | 0 | 4,600,000 | 0 | 9,300,000 |
Non Qualified Pension Plans [Member] | Entergy Arkansas [Member] |  |  |  |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) |  | 68,000 | 63,000 | 136,000 | 513,000 |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement |  | 0 | 0 | 0 | 379,000 |
Non Qualified Pension Plans [Member] | Entergy Louisiana [Member] |  |  |  |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) |  | 51,000 | 25,000 | 102,000 | 52,000 |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement |  | 0 | 0 | 0 | 0 |
Non Qualified Pension Plans [Member] | Entergy Mississippi [Member] |  |  |  |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) |  | 83,000 | 87,000 | 166,000 | 639,000 |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement |  | 0 | 0 | 0 | 453,000 |
Non Qualified Pension Plans [Member] | Entergy New Orleans [Member] |  |  |  |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) |  | 31,000 | 33,000 | 61,000 | 66,000 |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement |  | 0 | 0 | 0 | 0 |
Non Qualified Pension Plans [Member] | Entergy Texas [Member] |  |  |  |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) |  | 62,000 | 63,000 | 124,000 | 126,000 |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement |  | 0 | 0 | 0 | 0 |
Qualified Pension Plans [Member] |  |  |  |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) |  | 339,932,000 | 32,200,000 | 353,074,000 | 196,221,000 |
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) |
Qualified Pension Plans [Member] | Group annuity contract purchase |  |  |  |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Settlement | $ 1,157,000,000 |  |  |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement |  | 325,000,000 |  |  |  |
Group annuity contract population | 3,400 |  |  |  |  |
Qualified Pension Plans [Member] | Corporate and Other [Member] | Group annuity contract purchase |  |  |  |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement |  | 317,000,000 |  |  |  |
Qualified Pension Plans [Member] | Utility [Member] | Group annuity contract purchase |  |  |  |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement |  | 8,000,000 |  |  |  |
Qualified Pension Plans [Member] | Entergy Arkansas [Member] |  |  |  |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) |  | 4,908,000 | 8,247,000 | 9,815,000 | 38,343,000 |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement |  | 0 | (1,784,000) | 0 | (23,958,000) |
Qualified Pension Plans [Member] | Entergy Louisiana [Member] |  |  |  |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) |  | 2,667,000 | 9,601,000 | 5,334,000 | 52,989,000 |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement |  | 0 | (2,232,000) | 0 | (38,230,000) |
Qualified Pension Plans [Member] | Entergy Mississippi [Member] |  |  |  |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) |  | 832,000 | 2,360,000 | 1,664,000 | 16,308,000 |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement |  | 0 | (88,000) | 0 | (11,743,000) |
Qualified Pension Plans [Member] | Entergy New Orleans [Member] |  |  |  |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) |  | 276,000 | 337,000 | 551,000 | 2,482,000 |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement |  | 0 | (7,000) | 0 | (1,700,000) |
Qualified Pension Plans [Member] | Entergy Texas [Member] |  |  |  |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) |  | 109,000 | 1,880,000 | 217,000 | 12,745,000 |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement |  | 0 | (592,000) | 0 | (10,270,000) |
Qualified Pension Plans [Member] | System Energy [Member] |  |  |  |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) |  | 1,909,000 | 2,143,000 | 3,201,000 | 8,861,000 |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement |  | $ (611,000) | $ (490,000) | $ (611,000) | $ (5,290,000) |

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