| Fiscal period | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 |
| Period End Date | 12/31/2025 | 12/31/2024 | 12/31/2023 | 12/31/2022 | 12/31/2021 | 12/31/2020 | 12/31/2019 | 12/31/2018 | 12/31/2017 | 12/31/2016 |
| Operating Revenues | 30,713.00 | 28,130.00 | 28,823.00 | 31,543.00 | 26,989.00 | 9,093.00 | 9,821.00 | 9,478.00 | 10,629.00 | 12,351.00 |
| Revenues from majority-owned operations | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Equity in earnings of unconsolidated affiliates | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Total Revenues | 30,713.00 | 28,130.00 | 28,823.00 | 31,543.00 | 26,989.00 | 9,093.00 | 9,821.00 | 9,478.00 | 10,629.00 | 12,351.00 |
| Cost of operations | 24,761.00 | 22,100.00 | 26,526.00 | 27,446.00 | 20,482.00 | 6,540.00 | 7,303.00 | 7,108.00 | 7,536.00 | 8,555.00 |
| Cost of majority-owned operations | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Depreciation and amortization | 1,406.00 | 1,403.00 | 1,127.00 | 634.00 | 785.00 | 435.00 | 373.00 | 421.00 | 1,056.00 | 1,367.00 |
| General and administrative | 2,602.00 | 2,031.00 | 1,968.00 | 1,228.00 | 1,293.00 | 933.00 | 827.00 | 799.00 | 907.00 | 1,101.00 |
| Development costs | -- | -- | -- | -- | -- | 8.00 | 7.00 | 11.00 | 67.00 | 90.00 |
| Acquisition-related transaction and integration costs | 74.00 | 30.00 | 119.00 | 52.00 | 93.00 | -- | -- | -- | -- | 8.00 |
| Corporate relocation charges | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Restructuring and impairment charges | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Reorganization costs | -- | -- | -- | -- | -- | -- | 23.00 | -- | -- | -- |
| Impairment charges | 0.00 | (36.00) | (26.00) | (206.00) | (544.00) | (75.00) | (5.00) | (99.00) | (1,709.00) | (918.00) |
| Gain on sale of assets | (25.00) | 208.00 | 1,578.00 | 52.00 | 247.00 | 3.00 | 7.00 | 32.00 | 16.00 | 215.00 |
| Legal settlement | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Fresh start reporting adjustments | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Other charges | -- | -- | -- | -- | -- | -- | -- | -- | 87.00 | -- |
| Reorganization charges | -- | -- | -- | -- | -- | -- | -- | (90.00) | (44.00) | -- |
| Write downs and gains/(losses) on sales of equity method investments | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Provision for credit losses | -- | (314.00) | (251.00) | (11.00) | (698.00) | -- | -- | -- | -- | -- |
| Total operating costs and expenses | 28,843.00 | -- | 30,017.00 | 29,577.00 | 23,895.00 | 7,991.00 | 8,538.00 | 8,528.00 | -- | -- |
| Operating income (loss) | 1,845.00 | 2,424.00 | 384.00 | 2,018.00 | 3,341.00 | 1,105.00 | 1,290.00 | 982.00 | (587.00) | 527.00 |
| Interest expense | 741.00 | 651.00 | 667.00 | 417.00 | 485.00 | 401.00 | 413.00 | 483.00 | 890.00 | 1,061.00 |
| Special charges | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Write downs and gains/(losses) on sales of equity method investments | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Impairment charge on investment | 39.00 | 7.00 | 102.00 | -- | -- | 18.00 | 108.00 | 15.00 | 79.00 | 268.00 |
| Gain on sale of interest in projects | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Equity in earnings of unconsolidated affiliates | 11.00 | 20.00 | 16.00 | 6.00 | 17.00 | 17.00 | 2.00 | 9.00 | 31.00 | 27.00 |
| Gain on sale of equity method investment | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Other income, net | 68.00 | 44.00 | 47.00 | 56.00 | 63.00 | 67.00 | 66.00 | 18.00 | 38.00 | 42.00 |
| Loss on debt extinguishment | (10.00) | (382.00) | 109.00 | 0.00 | (77.00) | (9.00) | (51.00) | (44.00) | (53.00) | (142.00) |
| Refinancing expenses | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Minority interest in earnings of consolidated subsidiaries | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Bargain purchase gain related to GenOn acquisition | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Total other expense | (711.00) | (976.00) | (597.00) | (355.00) | (482.00) | (344.00) | (504.00) | (515.00) | (953.00) | (1,402.00) |
| Income from Continuing Operations Before Income Taxes | 1,134.00 | 1,448.00 | (213.00) | 1,663.00 | 2,859.00 | 761.00 | 786.00 | 467.00 | (1,540.00) | (875.00) |
| Income tax expense | 270.00 | 323.00 | (11.00) | 442.00 | 672.00 | 251.00 | (3,334.00) | 7.00 | 8.00 | 16.00 |
| Current : State | 49.00 | 82.00 | 84.00 | 65.00 | 48.00 | 22.00 | 2.00 | 6.00 | 19.00 | 17.00 |
| Deferred : State | 11.00 | (134.00) | (61.00) | 59.00 | 36.00 | 60.00 | (340.00) | 16.00 | (7.00) | (6.00) |
| Current : Foreign | 16.00 | 5.00 | (12.00) | 3.00 | 3.00 | 4.00 | 4.00 | -- | -- | -- |
| Current : U.S | (17.00) | 55.00 | 26.00 | 3.00 | -- | -- | -- | -- | -- | -- |
| Deferred : U.S | 221.00 | 333.00 | 50.00 | 258.00 | 569.00 | 168.00 | (3,000.00) | (16.00) | (6.00) | 3.00 |
| Deferred : Foreign | (10.00) | (18.00) | (98.00) | 54.00 | 16.00 | (3.00) | -- | 1.00 | 2.00 | 2.00 |
| Tax credits recognized | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Income from continuing operations | -- | -- | -- | -- | 2,187.00 | 510.00 | 4,120.00 | 460.00 | (1,548.00) | -- |
| Income from discontinued operations, net of income tax expense | -- | -- | -- | -- | -- | -- | 321.00 | (192.00) | (789.00) | -- |
| Consolidated Net Income (Loss) | 864.00 | 1,125.00 | (202.00) | 1,221.00 | 2,187.00 | 510.00 | 4,441.00 | 268.00 | (2,337.00) | (891.00) |
| Less: net loss attributable to noncontrolling interest | -- | -- | -- | -- | -- | -- | 3.00 | -- | (184.00) | (117.00) |
| Preference stock dividends | 67.00 | 67.00 | 54.00 | -- | -- | -- | -- | -- | -- | -- |
| Dividends for Preferred Shares | -- | -- | -- | -- | -- | -- | -- | 0.00 | -- | 5.00 |
| Gain on redemption of preferred shares | -- | -- | -- | -- | -- | -- | -- | 0.00 | -- | (78.00) |
| Income Available for Common Stockholders | 797.00 | 1,058.00 | (256.00) | 1,221.00 | 2,187.00 | 510.00 | 4,438.00 | 268.00 | (2,153.00) | (701.00) |
| Income From Continuing Operations per Weighted Average Common Share - Basic | -- | -- | -- | -- | 8.93 | 2.08 | 15.71 | 1.51 | (4.30) | -- |
| Income From Discontinued Operations per Weighted Average Common Share - Basic | -- | -- | -- | -- | -- | -- | 1.23 | (0.63) | (2.49) | -- |
| NET EARNINGS PER SHARE (BASIC) | 4.09 | 5.14 | (1.12) | 5.17 | 8.93 | 2.08 | 16.94 | 0.88 | (6.79) | (2.22) |
| Income From Continuing Operations per Weighted Average Common Share - Diluted | -- | -- | -- | -- | 8.93 | 2.07 | 15.59 | 1.49 | (4.30) | -- |
| Income From Discontinued Operations per Weighted Average Common Share - Diluted | -- | -- | -- | -- | -- | -- | 1.22 | (0.62) | (2.49) | -- |
| NET EARNINGS PER SHARE (DILUTED) | 4.01 | 4.99 | (1.12) | 5.17 | 8.93 | 2.07 | 16.81 | 0.87 | (6.79) | (2.22) |
| Weighted Average Shares Outstanding (Basic) | 195.00 | 206.00 | 228.00 | 236.00 | 245.00 | 245.00 | 262.00 | 304.00 | 317.00 | 316.00 |
| Weighted Average Shares Outstanding (Diluted) | 199.00 | 212.00 | 228.00 | 236.00 | 245.00 | 246.00 | 264.00 | 308.00 | 317.00 | 316.00 |