UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
|
| Statement of Comprehensive Income [Abstract] | ||||
| Net loss | $ (28.9) | $ (66.9) | $ (140.7) | $ (54.9) |
| Postretirement plans (net of $0.0 tax provisions in each period) | 8.6 | (10.2) | 2.9 | (30.6) |
| Foreign currency translation adjustment | 0.4 | 0.4 | 2.1 | 2.6 |
| Other comprehensive income (loss), net of income taxes | 9.0 | (9.8) | 5.0 | (28.0) |
| Comprehensive loss | (19.9) | (76.7) | (135.7) | (82.9) |
| Less: Net income attributable to noncontrolling interests | 3.9 | 3.2 | 15.1 | 8.4 |
| Comprehensive loss attributable to common stockholders | $ (23.8) | $ (79.9) | $ (150.8) | $ (91.3) |
| X | ||||||||||
- Definition Comprehensive Income (Loss) Attributable to Common Stockholders No definition available.
|
| X | ||||||||||
- Definition Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income. Excludes changes in equity resulting from investments by owners and distributions to owners. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount of Net Income (Loss) attributable to noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount after tax, before reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount after tax and reclassification adjustments of other comprehensive income (loss). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Amount, after tax and reclassification adjustment, of (increase) decrease in accumulated other comprehensive income for defined benefit plan. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- References No definition available.
|