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Debt - Aggregate Annual Maturities of Long-term Debt (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Debt Disclosure [Abstract]    
2020 $ 58.2  
2021 75.1  
2022 598.7  
2023 374.5  
2024 152.8  
Thereafter 242.4  
Total Debt $ 1,501.7 $ 1,384.8