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v3.25.1

Mergers, Acquisitions, and Dispositions - Narrative (Details) $ / shares in Units, shares in Millions, $ in Millions |  | 1 Months Ended |  |
--- | --- | --- | --- | ---
Jan. 10, 2025 USD ($) $ / shares TW GW shares | Nov. 30, 2023 USD ($) MW | Jun. 30, 2025 | May 31, 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 |  | $ 1,660 |  |
Calpine |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Newly issued shares (in shares) | shares | 50 |  |  |
Par value (in dollars per share) | $ / shares | $ 0 |  |  |
Payments to acquire businesses | $ 4,500 |  |  |
Outstanding debt assumed | $ 12,700 |  |  |
Calpine | Natural Gas, Geothermal, Battery Storage, and Solar Assets |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
MW of generation | GW | 27 |  |  |
Calpine | Retail Electric Supplier Platform |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
MW of generation | TW | 60 |  |  |
Constellation South Texas LLP |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Equity ownership |  | 44.00% |  |
Sale of equity ownership |  |  |  | 2.00%
Constellation South Texas LLP | Forecast |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Equity ownership |  |  | 42.00% |
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 | CPS | Forecast |  |  |  |
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% |  |

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