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Stock-Based Compensation - Components of Stock-Based Compensation Expense (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
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