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Stock and Stock-Based Compensation Plans (Tables) | 9 Months Ended
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Sep. 30, 2023
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 September 30, |  | Nine Months Ended September 30,
| 2023 |  | 2022 |  | 2023 |  | 2022
PRSUs | $ | 1.5 |  |  | $ | 1.3 |  |  | $ | 3.4 |  |  | $ | 15.1 |
RSUs | 1.9 |  |  | 0.9 |  |  | 7.1 |  |  | 3.4 |
Service options | 0.2 |  |  | 0.2 |  |  | 0.5 |  |  | 0.6 |
Market options | 0.6 |  |  | 0.9 |  |  | 2.1 |  |  | 3.5 |
Total stock-based compensation expense | $ | 4.2 |  |  | $ | 3.3 |  |  | $ | 13.1 |  |  | $ | 22.6 |

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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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