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DERIVATIVE FINANCIAL INSTRUMENTS - Activity Related to Other Comprehensive Income (Details) - Derivatives in Cash Flow Hedging Relationships - USD ($)
$ in Millions
12 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Derivative Instruments, Gain (Loss) [Line Items]    
Amount Recognized in OCI on Derivative (Effective Portion) $ (4.9) $ (0.1)
Amount Reclassified from Accumulated OCI Into Income (Effective Portion) 4.7 (5.3)
Commodity contracts | Product cost    
Derivative Instruments, Gain (Loss) [Line Items]    
Amount Recognized in OCI on Derivative (Effective Portion) (4.9) (0.1)
Amount Reclassified from Accumulated OCI Into Income (Effective Portion) $ 4.7 $ (5.3)