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Leases - Maturity of Lease Liabilities (Details)
$ in Millions
Dec. 31, 2019
USD ($)
Leases [Abstract]  
2020 $ 131.3
2021 108.4
2022 84.0
2023 64.5
2024 54.1
Thereafter 173.4
Total undiscounted cash flows 615.7
Less: Imputed interest (79.4)
Lease obligations under operating leases $ 536.3