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Stock-Based Incentive Plans - Stock-Based Compensation Expense (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Share-Based Payment Arrangement [Abstract]      
Equity classified awards expense $ 12.0 $ 16.2 $ 11.6
Liability classified awards expense (1.4) 1.4 2.3
Total stock-based compensation expense $ 10.6 $ 17.6 $ 13.9