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Stock-Based Compensation (Tables) | 6 Months Ended
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Jun. 30, 2024
Share-Based Payment Arrangement [Abstract] |
Stock-based compensation expense | The following table summarizes our stock-based compensation expense for the three and six months ended June 30, 2024 and 2023.
|  | Three Months Ended |  | Six Months Ended
|  | June 30, |  | June 30,
(in millions) |  | 2024 |  | 2023 |  | 2024 |  | 2023
Stock-based compensation expenses (restricted share units (“RSUs”) and performance-based RSUs (“PRSUs”)), before income taxes |  | $ | 7.6 |  |  | $ | 7.9 |  |  | $ | 14.8 |  |  | $ | 15.7 |
Tax benefit |  | (0.4) |  |  | (0.1) |  |  | (0.6) |  |  | (0.5) |
Stock-based compensation expense, net of tax |  | $ | 7.2 |  |  | $ | 7.8 |  |  | $ | 14.2 |  |  | $ | 15.2 |
Activity of RSUs and PRSUs Issued to Our Employees | The following table summarizes activity for the six months ended June 30, 2024, of RSUs and PRSUs issued to our employees.
|  | Activity |  | Weighted Average Per Share Grant Date Fair Market Value
Non-vested as of December 31, 2023 |  | 2,781,836 |  |  | $ | 21.10 |
Granted: |  |  |  |
RSUs |  | 1,649,172 |  |  | 12.52 |
PRSUs |  | 796,689 |  |  | 12.43 |
Vested: |  |  |  |
RSUs |  | (965,084) |  |  | 21.04 |
PRSUs |  | (417,637) |  |  | 22.06 |
Forfeitures: |  |  |  |
RSUs |  | (77,316) |  |  | 14.91 |
PRSUs |  | (196,486) |  |  | 18.66 |
Non-vested as of June 30, 2024 |  | 3,571,174 |  |  | 15.37 |

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- Definition Tabular disclosure of cost recognized for award under share-based payment arrangement by plan. Includes, but is not limited to, related tax benefit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Tabular disclosure of the change in restricted stock units (RSUs). + References No definition available. + Details
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