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Stock-Based Compensation (Financial Information For Stock Options) (Details) - Employee Stock Option [Member] - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
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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 | $ 1.2 | $ 1.0 | $ 2.3 | $ 2.0
Tax benefit recognized in Entergy's net income | 0.3 | 0.2 | 0.6 | 0.5
Compensation cost capitalized as part of fixed assets and inventory | $ 0.4 | $ 0.4 | $ 0.8 | $ 0.8

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