RECEIVABLES - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Receivables [Line Items]
Allowance for uncollectible receivables	$ 8.1	$ 7.7	$ 7.3	$ 6.7
Factoring costs	$ 1.9	$ 15.1	$ 10.2
Two Customers | Trade Receivable | Customer Concentration Risk
Receivables [Line Items]
Concentration risk	42.60%	39.80%