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Revenue Recognition Revenue Recognition (Narrative) (Details) - $ / MWh | 3 Months Ended | 60 Months Ended
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Mar. 31, 2018 | Dec. 31, 2022
Subsequent Event [Member] |  |
Maximum PPA price (per MWh) |  | 61.50
System Energy [Member] |  |
Percent Interest in Grand Gulf | 90.00% |

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- Definition Percent Interest in Grand Gulf + References No definition available. + Details
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- Definition Price under PPA, upper range, per Mwh. + References No definition available. + Details
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- Details
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- Details
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