| Fiscal period | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|
| Period End Date | 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 | 12/31/2015 |
|---|
| Operating Revenues | 2,930.13 | 3,005.98 | 2,653.77 | 2,017.55 | 2,134.04 | 3,043.38 | 3,057.62 | 2,564.29 | 2,227.84 | 3,864.44 |
| Earnings from unconsolidated affiliates | -- | -- | -- | -- | -- | (0.01) | -- | -- | -- | -- |
| Membership and other income | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Investment income | 38.71 | 43.82 | 14.99 | 1.56 | 1.44 | 10.22 | (9.50) | 1.19 | 1.18 | 2.31 |
| Interest income | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Earnings (losses) from unconsolidated affiliates | -- | -- | -- | -- | -- | -- | 0.00 | 0.01 | (221.91) | (75.08) |
| Total Revenues | 2,968.84 | 3,049.80 | 2,668.76 | 2,019.11 | 2,135.48 | 3,053.60 | 3,048.12 | 2,565.49 | 2,007.11 | 3,791.66 |
| Direct costs | 1,742.41 | 1,790.38 | 1,666.00 | 1,286.90 | 1,333.07 | 1,929.33 | 1,976.97 | 1,718.07 | 1,344.30 | 2,371.44 |
| Depletion | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Depreciation and amortization | 633.41 | 645.29 | 665.07 | 693.38 | 853.70 | 876.09 | 866.87 | 842.94 | 871.63 | 970.46 |
| Interest expense | 210.86 | 185.29 | 177.90 | 171.48 | 206.27 | 204.31 | 227.12 | 222.89 | 185.36 | 181.93 |
| Research and engineering | 57.06 | 56.30 | 49.94 | 35.15 | 33.56 | 50.36 | 56.15 | 51.07 | 33.58 | 41.25 |
| General and administrative expenses | 249.32 | 244.15 | 228.43 | 213.56 | 203.52 | 258.73 | 265.82 | 251.18 | 227.64 | 324.33 |
| Other, net | (106.82) | 0.73 | (131.70) | (53.42) | (28.57) | (33.22) | (29.53) | (14.88) | (37.51) | 39.17 |
| Gains (losses) on sales of long-lived assets, impairment charges and other income (expense), net | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Impairments and other charges | -- | -- | -- | (66.73) | (410.63) | (290.47) | (144.45) | (44.54) | (505.16) | (368.97) |
| (Gain)/loss on debt buybacks and exchanges | -- | -- | 4.60 | 13.42 | 228.27 | -- | -- | -- | -- | -- |
| Total costs and other deductions | 2,999.88 | 2,920.68 | 2,914.44 | 2,507.19 | -- | 3,642.52 | 3,566.92 | 3,145.57 | 3,205.18 | 4,219.20 |
| Goodwill and intangible asset impairment | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Income (loss) before income taxes | (31.04) | 129.12 | (245.68) | (488.09) | (705.57) | (588.92) | (518.79) | (580.08) | (1,198.08) | (427.54) |
| Current- U.S. Federal | -- | -- | -- | (1.91) | (39.27) | 1.21 | (32.35) | (160.76) | (19.94) | 5.09 |
| Current- Foreign | -- | -- | -- | 60.32 | 33.86 | 54.10 | 32.93 | 59.49 | 31.85 | 76.55 |
| Current: State | 1.76 | -- | -- | 7.91 | (2.02) | 0.32 | 1.81 | (0.81) | 2.87 | 8.23 |
| Income tax expense (benefit)-Current | 35.26 | 63.34 | 54.20 | 66.33 | (7.43) | 55.63 | 2.39 | (102.08) | 14.78 | 89.87 |
| Income tax expense (benefit)-Deferred | 21.68 | 15.88 | 7.34 | (10.71) | 64.72 | 35.95 | 76.88 | 19.11 | (201.61) | (187.90) |
| Deferred: State | -- | -- | -- | (2.43) | 1.80 | 3.22 | (0.11) | (3.23) | (22.67) | (7.14) |
| Deferred: Foreign | -- | -- | -- | (3.61) | (4.99) | (25.43) | 39.52 | (26.68) | (14.64) | 1.76 |
| Deferred- U.S. Federal | -- | -- | -- | (4.67) | 67.91 | 58.16 | 37.48 | 49.02 | (164.30) | (182.52) |
| Subsidiary preferred stock dividend | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Income from continuing operations, net of tax | -- | 49.90 | (307.22) | (543.71) | (762.85) | (680.50) | (598.06) | (497.11) | (1,011.24) | (329.50) |
| Earnings (loss) from operation of discontinued operations | -- | 0.00 | -- | 0.02 | 0.01 | (0.01) | (14.66) | (43.52) | (18.36) | (42.80) |
| Net Income (loss) | (87.99) | 49.90 | (307.22) | (543.69) | (762.85) | (680.51) | (612.73) | (540.63) | (1,029.61) | (372.29) |
| Less: Net (income) loss attributable to noncontrolling interest | 88.10 | 61.69 | 43.04 | 25.58 | 42.80 | 22.38 | 28.22 | 6.18 | 0.14 | 0.38 |
| Subsidiary preferred stock dividend | -- | -- | -- | 3.65 | 14.61 | 17.24 | 12.31 | -- | -- | -- |
| Net Income (loss) Available to Common Shareholders | (176.08) | (11.78) | (350.26) | (572.93) | (820.25) | (720.13) | (653.25) | (546.81) | (1,029.74) | (372.68) |
| Basic from continuing operations | -- | (5.49) | (40.52) | (76.58) | (118.69) | (105.50) | (97.50) | (87.50) | (179.00) | (57.00) |
| Basic from discontinued operations | -- | 0.00 | -- | -- | -- | -- | (2.00) | (7.50) | (3.00) | (7.50) |
| Net Earnings Per Share (Basic) | (22.37) | (5.49) | (40.52) | (76.58) | (118.69) | (105.50) | (99.50) | (95.00) | (182.00) | (64.50) |
| Diluted from continuing operations | -- | (5.49) | (40.52) | (76.58) | (118.69) | (105.50) | (97.50) | (87.50) | (179.00) | (57.00) |
| Diluted from discontinued operations | -- | 0.00 | -- | -- | -- | -- | (2.00) | (7.50) | (3.00) | (7.50) |
| Net Earnings Per Share (Diluted) | (22.37) | (5.49) | (40.52) | (76.58) | (118.69) | (105.50) | (99.50) | (95.00) | (182.00) | (64.50) |
| Weighted Average Shares Outstanding (Basic) | 9.20 | 9.16 | 8.90 | 7.61 | 7.06 | 7.03 | 6.69 | 5.61 | 5.53 | 5.66 |
| Weighted Average Shares Outstanding (Diluted) | 9.20 | 9.16 | 8.90 | 7.61 | 7.06 | 7.03 | 6.69 | 5.61 | 5.53 | 5.66 |