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Debt - Scheduled Maturities (Details) - USD ($)
$ in Millions
Jun. 30, 2019
Sep. 30, 2018
Debt    
2019 (three months remaining) $ 75.7  
2020 108.2  
2021 348.4  
2022 314.1  
2023 668.9  
Thereafter 2,337.2  
Total debt $ 3,852.5 $ 3,673.5