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Asset Retirement Obligations (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended
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Jun. 30, 2024 | Mar. 31, 2024
Entergy Arkansas [Member] | ANO [Member] |  |
Asset Retirement Obligation, Revision of Estimate |  | $ 14.4
Entergy Arkansas [Member] | Independence and White Bluff |  |
Asset Retirement Obligation, Revision of Estimate | $ 31.0 |
Entergy Mississippi [Member] | Independence |  |
Asset Retirement Obligation, Revision of Estimate | $ 9.0 |

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- Definition Amount of increase (decrease) in the asset retirement obligation from changes in the amount or timing of the estimated cash flows associated with the settlement of the obligation. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 410 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c)(4) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481850/410-20-50-1 + Details
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