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Debt - Scheduled Maturities (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Sep. 30, 2020
Debt    
2021 (nine months remaining) $ 18.7  
2022 20.2  
2023 247.2  
2024 6.7  
2025 799.9  
Thereafter 997.4  
Total debt $ 2,090.1 $ 2,085.0