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Income Taxes (Unrecognized Tax Benefits) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Income Tax Disclosure [Abstract]      
Liability for Uncertain Tax Positions, Noncurrent $ 1.0 $ 0.8 $ 0.4
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions 0.4 0.5  
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions $ (0.2) $ (0.1)