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Long-Term Debt - Long-Term Debt Maturities (Details)
$ in Millions
Dec. 31, 2019
USD ($)
Debt Disclosure [Abstract]  
2020 $ 34.1
2021 69.3
2022 65.9
2023 14.9
2024 589.9
Thereafter 2,563.8
Debt, total long-term and short-term $ 3,337.9