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Leases - Future Minimum Lease Payments (Details)
$ in Millions
Mar. 31, 2021
USD ($)
Lessee, Operating Lease, Liability, Payment, Due [Abstract]  
2021 (excluding the three months ending March 31, 2021) $ 23.6
2022 27.3
2023 21.6
2024 17.7
2025 16.8
Thereafter 102.8
Total undiscounted lease payments 209.8
Less: Present value adjustment (39.8)
Present value of lease liabilities $ 170.0