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Maturities of Operating Lease Liabilities (Details) - USD ($)
$ in Millions
Mar. 31, 2020
Dec. 31, 2019
Leases [Abstract]    
2020 $ 9.0 $ 12.1
2021 10.9 10.4
2022 9.2 8.6
2023 8.2 7.8
2024 7.7 7.3
Thereafter 41.0 41.8
Operating leases liabilities payments due 86.0 88.0
Less: imputed lease interest (15.4) (16.0)
Total lease liabilities $ 70.6 $ 72.0