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INDEBTEDNESS - Maturities of Long-Term Debt Payable (Details)
$ in Millions
Dec. 31, 2019
USD ($)
Maturities of Long-term Debt and Capital Lease Obligations [Abstract]  
2020 $ 20.8
2021 0.2
2022 100.1
2023 0.1
2024 $ 300.1