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Stock-Based Compensation - Components of Stock-Based Compensation Expense (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
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Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Share-Based Payment Arrangement [Abstract] |  |  |  |
Equity classified awards expense | $ 3.5 | $ 4.0 | $ 5.3 | $ 8.4
Liability classified awards (credit) expense | (1.3) | 1.0 | (0.6) | 1.4
Total stock-based compensation expense | $ 2.2 | $ 5.0 | $ 4.7 | $ 9.8

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