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Stock-Based Compensation - Share-based Compensation Expense (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Stock-based compensation expense (income) | $ 0.6 | $ 3.2 | $ 7.8 | $ 12.2
Stock option compensation expense |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Stock-based compensation expense (income) | 0.4 | 0.6 | 3.1 | 2.9
RSU compensation expense |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Stock-based compensation expense (income) | 0.8 | 0.9 | 3.8 | 4.3
PSU compensation expense |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Stock-based compensation expense (income) | $ (0.6) | $ 1.7 | $ 0.9 | $ 5.0

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