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Leases Maturities of Operating Lease Liabilities (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Jan. 01, 2019
Leases [Abstract]    
2020 $ 14.3  
2021 13.2  
2022 9.2  
2023 3.5  
2024 1.6  
Thereafter 5.3  
Total lease payments 47.1  
Less imputed interest (4.6)  
Total $ 42.5 $ 49.9