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Mergers, Acquisitions, and Dispositions - Narrative (Details) $ in Millions	Nov. 01, 2023 USD ($) MW	May 02, 2024	May 01, 2024
Constellation South Texas LLP
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
MW of generation \| MW	2,645
Consideration \| $	$ 1,650
Constellation South Texas LLP
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Equity ownership	44.00%
Constellation South Texas LLP \| City of Austin
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Equity ownership	16.00%
Constellation South Texas LLP \| Subsequent Event
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Equity ownership		42.00%
Sale of equity ownership			2.00%
Constellation South Texas LLP \| Subsequent Event \| STP Nuclear Operating Company
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Equity ownership		42.00%
Constellation South Texas LLP \| STP Nuclear Operating Company
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Equity ownership	40.00%