v3.25.2
Mergers, Acquisitions, and Dispositions - Narrative (Details)
$ / shares in Units, shares in Millions, $ in Millions
1 Months Ended
Jan. 10, 2025
USD ($)
$ / shares
GW
TW
shares
Nov. 30, 2023
USD ($)
MW
May 31, 2024
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]      
MW of generation | MW   2,645  
Consideration   $ 1,660  
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 | 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 | STP Nuclear Operating Company      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Equity ownership   40.00%