v3.24.3
Segment Reporting (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Dec. 31, 2023
Segment Reporting Information [Line Items]          
Operating revenues $ 486 $ 371 $ 1,115 $ 1,065  
Cost of operations, exclusive of depreciation, amortization and accretion shown separately below 135 134 378 360  
Depreciation, amortization and accretion 164 133 471 389  
General and administrative 9 9 29 28  
Transaction and integration costs 0 1 4 3  
Operating income (loss) 178 94 233 285  
Equity in earnings of unconsolidated affiliates 13 11 33 11  
Other income, net 8 15 36 32  
Loss on debt extinguishment 0 0 (3) 0  
Interest expense (139) (48) (284) (202)  
Income (loss) before income taxes 60 72 15 126  
Income tax expense 33 57 30 67  
Net Income (Loss) 27 15 (15) 59  
Total Assets 14,249   14,249   $ 14,701
Operating Segments          
Segment Reporting Information [Line Items]          
Operating revenues 486 371 1,115 1,065  
Operating Segments | Conventional Generation          
Segment Reporting Information [Line Items]          
Operating revenues 102 132 266 342  
Cost of operations, exclusive of depreciation, amortization and accretion shown separately below 41 54 109 123  
Depreciation, amortization and accretion 29 33 88 98  
General and administrative 0 0 0 0  
Transaction and integration costs   0 0 0  
Operating income (loss) 32 45 69 121  
Equity in earnings of unconsolidated affiliates 1 0 2 2  
Other income, net 1 1 4 3  
Loss on debt extinguishment     0    
Interest expense (9) (8) (25) (27)  
Income (loss) before income taxes 25 38 50 99  
Income tax expense 0 0 0 0  
Net Income (Loss) 25 38 50 99  
Total Assets 1,976   1,976    
Operating Segments | Renewables          
Segment Reporting Information [Line Items]          
Operating revenues 384 239 849 723  
Cost of operations, exclusive of depreciation, amortization and accretion shown separately below 95 80 271 238  
Depreciation, amortization and accretion 135 100 383 291  
General and administrative 0 0 0 0  
Transaction and integration costs   0 0 0  
Operating income (loss) 154 59 195 194  
Equity in earnings of unconsolidated affiliates 12 11 31 9  
Other income, net 6 8 23 12  
Loss on debt extinguishment     (3)    
Interest expense (106) (16) (186) (103)  
Income (loss) before income taxes 66 62 60 112  
Income tax expense 0 0 0 0  
Net Income (Loss) 66 62 60 112  
Total Assets 12,164   12,164    
Corporate          
Segment Reporting Information [Line Items]          
Operating revenues 0 0 0 0  
Cost of operations, exclusive of depreciation, amortization and accretion shown separately below (1) 0 (2) (1)  
Depreciation, amortization and accretion 0 0 0 0  
General and administrative 9 9 29 28  
Transaction and integration costs   1 4 3  
Operating income (loss) (8) (10) (31) (30)  
Equity in earnings of unconsolidated affiliates 0 0 0 0  
Other income, net 1 6 9 17  
Loss on debt extinguishment     0    
Interest expense (24) (24) (73) (72)  
Income (loss) before income taxes (31) (28) (95) (85)  
Income tax expense 33 57 30 67  
Net Income (Loss) (64) $ (85) (125) $ (152)  
Total Assets $ 109   $ 109