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DERIVATIVES - Summary of Impact of Designated Hedges and Gain (Loss) (Details) - USD ($)
$ in Millions
 12 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2021
Derivative Instruments, Gain (Loss) [Line Items]      
Unrealized (loss) gain on derivative instruments before reclassification $ (35.3) $ 30.7 $ 0.1
Cash Flow Hedge      
Derivative Instruments, Gain (Loss) [Line Items]      
Unrealized (loss) gain on derivative instruments before reclassification (34.5) 31.1 (1.9)
Net reclassification for loss (gain) to income from operations (12.2) 20.2 (9.2)
Foreign exchange contracts | Net sales | Cash Flow Hedge      
Derivative Instruments, Gain (Loss) [Line Items]      
Unrealized (loss) gain on derivative instruments before reclassification 0.3 0.2 0.1
Net reclassification for loss (gain) to income from operations 0.2 0.1 0.1
Foreign exchange contracts | Cost of goods sold | Cash Flow Hedge      
Derivative Instruments, Gain (Loss) [Line Items]      
Unrealized (loss) gain on derivative instruments before reclassification (34.8) 30.9 (2.0)
Net reclassification for loss (gain) to income from operations $ (12.4) $ 20.1 $ (9.3)