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FAIR VALUE OF FINANCIAL INSTRUMENTS - Schedule of Carrying Values and Fair Values for Financial Instruments (Details) - USD ($)
$ in Millions
Sep. 30, 2024
Sep. 30, 2023
Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative assets $ 1.8 $ 3.3
Derivative liabilities 15.3 9.0
Debt 576.3 1,418.6
Carrying Amount    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative assets 1.8 3.3
Derivative liabilities 15.3 9.0
Debt 560.8 1,555.5
Level 1    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative assets 0.0 0.0
Derivative liabilities 0.0 0.0
Debt 0.0 0.0
Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative assets 1.8 3.3
Derivative liabilities 15.3 9.0
Debt 576.3 1,418.6
Level 3    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative assets 0.0 0.0
Derivative liabilities 0.0 0.0
Debt $ 0.0 $ 0.0