v3.26.1
Segments - Schedule of Adjusted EBITDA and Reconciling Items (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Reconciling Items:        
Interest expense and other finance charges $ (214) $ (62) $ (333) $ (136)
Depreciation, amortization and accretion (88) (67) (151) (137)
Nuclear fuel amortization (22) (18) (46) (44)
Unrealized gain (loss) on commodity derivative contracts (211) 92 (365) (90)
Nuclear decommissioning trust funds gain (loss), net 134 80 112 68
Stock-based and other long-term incentive compensation expense (71) (18) (73) (31)
Acquisition and divestiture activities (28) 3 (37) (4)
Other items (3) (3) (2) (6)
Income (loss) before income taxes (129) 97 (48) (90)
Operating Segments | PJM        
Segment Adjusted EBITDA:        
Adjusted EBITDA 378 115 857 324
Reconciling Items:        
Interest expense and other finance charges 0 0 0 0
Operating Segments | Other        
Segment Adjusted EBITDA:        
Adjusted EBITDA 6 (1) 15 8
Reconciling Items:        
Interest expense and other finance charges 0 0 0 0
Corporate and Eliminations        
Segment Adjusted EBITDA:        
Adjusted EBITDA (10) (24) (25) (42)
Reconciling Items:        
Interest expense and other finance charges $ (214) $ (62) $ (333) $ (136)