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Income Taxes - Components of Income Tax Expense (Benefit) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Income Tax Disclosure [Abstract]      
Document Fiscal Year Focus 2021    
Current:      
U.S. Federal $ 0.4 $ 0.7 $ 0.7
State and local 0.3 0.2 0.2
Foreign 14.8 10.3 15.9
Total current tax expense 15.5 11.2 16.8
Deferred:      
U.S. Federal (57.1) (0.4) 0.1
State and local (2.6) 0.2 (0.1)
Foreign (1.4) (2.6) (0.2)
Total deferred tax benefit (61.1) (2.8) (0.2)
Total income tax (benefit) expense $ (45.6) $ 8.4 $ 16.6