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DEBT - Aggregate Scheduled Maturities of Debt and Capital Lease Obligations (Details)
$ in Millions
Sep. 30, 2021
USD ($)
Debt Instrument [Line Items]  
2022 $ 4.0
2023 4.0
2024 4.0
2025 454.0
2026 4.0
Thereafter 1,970.9
Total long-term debt $ 2,440.9