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Debt - Scheduled Maturities (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Sep. 30, 2019
Debt    
2020 (nine months remaining) $ 104.2  
2021 199.1  
2022 301.8  
2023 578.0  
2024 9.7  
Thereafter 2,311.1  
Total debt $ 3,503.9 $ 3,352.5