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Income Taxes - Unrecognized Tax Benefits (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]    
Beginning balance $ 4.2 $ 4.7
(Decreases) as a result of tax positions taken during a prior period 0.0 (0.1)
Increases as a result of tax positions taken during the current year 1.2 0.8
Decreases relating to settlement with tax authorities (0.2) 0.0
Decreases as a result of a lapse of the applicable statute of limitations (1.1) (1.0)
Decreases as a result of foreign currency fluctuations 0.0 (0.2)
Ending balance $ 4.1 $ 4.2