Asset Retirement Obligations (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	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