Asset Retirement Obligations (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024
Entergy Louisiana [Member] | Nelson Units 1 and 2
Asset Retirement Obligation, Revision of Estimate	$ 19.4
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 Arkansas [Member] | Walnut Bend Solar facility [Member]
Asset Retirement Obligation, Revision of Estimate	14.1
Entergy Arkansas [Member] | Driver Solar facility
Asset Retirement Obligation, Revision of Estimate	$ 40.1
Entergy Mississippi [Member] | Independence
Asset Retirement Obligation, Revision of Estimate		$ 9.0
Entergy Mississippi [Member] | Sunflower Solar facility
Asset Retirement Obligation, Revision of Estimate			$ 10.0