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Income Taxes (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Income Taxes      
Foreign operating loss carryforwards $ 56.4    
Valuation allowance 20.8    
Net operating losses subject to expiration 11.6    
Other Income (Expense)      
Income Taxes      
Income tax expense (benefit) $ (45.2) $ (15.0) $ 32.6