Stock-Based Compensation (Financial Information For Other Equity Plans) (Details) - Other Equity Awards [Member] - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Employee service share-based compensation, aggregate disclosures
Compensation expense included in Entergy's net income	$ 10.6	$ 9.7	$ 22.0	$ 20.5
Tax benefit recognized in Entergy's net income	2.7	2.5	5.6	5.2
Compensation cost capitalized as part of fixed assets and inventory	$ 4.3	$ 4.0	$ 8.7	$ 8.0

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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