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Segment Reporting (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Segment Reporting Information [Line Items]
Asset Impairment Charges	$ 12,795	$ 107,134	$ 42,679
Percentage threshold for major customers	10.00%	10.00%	10.00%
Number of Reportable Segments	1
System Energy [Member]
Segment Reporting Information [Line Items]
Percent Interest in Grand Gulf	90.00%
Entergy Arkansas [Member]
Segment Reporting Information [Line Items]
Asset Impairment Charges	$ 0	$ 131,775	$ 78,434
Entergy New Orleans [Member]
Segment Reporting Information [Line Items]
Asset Impairment Charges	$ 12,795	$ 0	$ 0

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Percentage threshold for major customers

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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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