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Income Taxes (Unrecognized Tax Benefits) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Income Tax Disclosure [Abstract]      
Liability for Uncertain Tax Positions, Noncurrent $ 2.9 $ 1.9 $ 1.0
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions 1.0 0.9  
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions $ 0.0 $ 0.0