Stock-Based Compensation (Financial Information For Stock Options) (Details) - Employee Stock Option [Member] - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Employee service share-based compensation, aggregate disclosures
Compensation expense included in Entergy's net income	$ 1.1	$ 0.9	$ 3.2	$ 3.2
Tax benefit recognized in Entergy's net income	0.3	0.2	0.9	0.8
Compensation cost capitalized as part of fixed assets and inventory	$ 0.5	$ 0.4	$ 1.6	$ 1.2