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DERIVATIVES - Schedule of Impact of Designated Hedges and Gain (Loss) (Details) - Foreign Exchange Contract - USD ($)
$ in Millions
 12 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2023
Net sales      
Derivative Instruments, Gain (Loss) [Line Items]      
Foreign exchange contracts - cash flow hedges $ 0.1 $ 0.3 $ 0.2
Cost of goods sold      
Derivative Instruments, Gain (Loss) [Line Items]      
Foreign exchange contracts - cash flow hedges (8.9) (15.5) (12.4)
Other non-operating expense, net      
Derivative Instruments, Gain (Loss) [Line Items]      
Foreign exchange contracts - not designated as hedge $ 11.1 $ (20.1) $ (14.3)