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Shareholders Equity (Tables) | 3 Months Ended
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Mar. 31, 2024
Statement of Stockholders' Equity [Abstract] |
Schedule Of Activity In Our Various Shareholders Equity [Table Text Block] | Activity in our various shareholders' equity accounts for the three months ended March 31, 2024 and 2023 were as follows (in millions):
| Shares Issued |  | Par Value |  | Additional Paid-in Capital |  | Warrants |  | Retained Earnings |  | AOCI |  | Treasury Shares |  | Non-controlling Interest
BALANCE, December 31, 2023 | 75.4 |  |  | $ | 0.8 |  |  | $ | 1,119.8 |  |  | $ | 16.4 |  |  | $ | 1,025.5 |  |  | $ | 25.2 |  |  | $ | (200.1) |  |  | $ | 9.4 |
Net income | — |  |  | — |  |  | — |  |  | — |  |  | 25.5 |  |  | — |  |  | — |  |  | — |
Share-based compensation cost | — |  |  | — |  |  | 8.0 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Net changes in pension and other postretirement benefits | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (0.2) |  |  | — |  |  | — |
Shares withheld for taxes on vesting of share-based awards | — |  |  | — |  |  | (0.1) |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Net other comprehensive income | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 0.1 |  |  | — |  |  | — |
BALANCE, March 31, 2024 | 75.4 |  |  | $ | 0.8 |  |  | $ | 1,127.7 |  |  | $ | 16.4 |  |  | $ | 1,051.0 |  |  | $ | 25.1 |  |  | $ | (200.1) |  |  | $ | 9.4 |
| Shares Issued |  | Par Value |  | Additional Paid-in Capital |  | Warrants |  | Retained Earnings |  | AOCI |  | Treasury Shares |  | Non-controlling Interest
BALANCE, December 31, 2022 | 75.2 |  |  | $ | 0.8 |  |  | $ | 1,097.9 |  |  | $ | 16.4 |  |  | $ | 160.1 |  |  | $ | 14.7 |  |  | $ | — |  |  | $ | 8.0 |
Net income | — |  |  | — |  |  | — |  |  | — |  |  | 46.7 |  |  | — |  |  | — |  |  | 1.9 |
Share-based compensation cost | — |  |  | — |  |  | 5.7 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Net changes in pension and other postretirement benefits | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (0.1) |  |  | — |  |  | — |
Net other comprehensive loss | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (0.1) |  |  | — |  |  | — |
BALANCE, March 31, 2023 | 75.2 |  |  | $ | 0.8 |  |  | $ | 1,103.6 |  |  | $ | 16.4 |  |  | $ | 206.8 |  |  | $ | 14.5 |  |  | $ | — |  |  | $ | 9.9 |

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- Definition Schedule Of Activity In Our Various Shareholders Equity [Table Text Block] + References No definition available. + Details
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