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Stock and Stock-Based Compensation Plans (Tables) | 6 Months Ended
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Jun. 30, 2025
Share-Based Payment Arrangement [Abstract] |
Summary of stock-based compensation expense by type of award | The following table summarizes our stock-based compensation expense by type of award (in millions):
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2025 |  | 2024 |  | 2025 |  | 2024
PRSUs | $ | 1.6 |  |  | $ | 1.4 |  |  | $ | 2.1 |  |  | $ | 5.2 |
RSUs | 2.3 |  |  | 2.2 |  |  | 6.0 |  |  | 5.1 |
Service options | 0.1 |  |  | 0.2 |  |  | — |  |  | 0.3 |
Market options | 0.1 |  |  | (0.3) |  |  | (2.3) |  |  | (0.5) |
Total stock-based compensation expense | $ | 4.1 |  |  | $ | 3.5 |  |  | $ | 5.8 |  |  | $ | 10.1 |

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- Definition Tabular disclosure of the amount of total share-based compensation cost, including the amounts attributable to each share-based compensation award. + References No definition available. + Details
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- References No definition available. + Details
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