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FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) - USD ($)
$ in Millions
Sep. 30, 2025
Sep. 30, 2024
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative Asset, Statement of Financial Position [Extensible Enumeration] Deferred charges and other, Other receivables Deferred charges and other, Other receivables
Derivative Liability, Current, Statement of Financial Position [Extensible Enumeration] Accounts payable, Other long-term liabilities Accounts payable, Other long-term liabilities
Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative assets $ 0.8 $ 1.8
Derivative liabilities 9.6 15.3
Debt 532.7 576.3
Carrying Amount    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative assets 0.8 1.8
Derivative liabilities 9.6 15.3
Debt 567.9 560.8
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 0.8 1.8
Derivative liabilities 9.6 15.3
Debt 532.7 576.3
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