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Income Taxes - Unrecognized Income Taxes (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns      
Balance at beginning of year $ 0.3 $ 0.1 $ 0.1
Additions for tax positions related to prior years 0.5 0.3 0.0
Reduction for lapse of statute of limitation 0.0 (0.1) 0.0
Balance at end of year $ 0.8 $ 0.3 $ 0.1