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RECEIVABLES - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2019
Receivables [Line Items]        
Allowance for uncollectible receivables $ 7.3 $ 6.7 $ 5.3 $ 3.5
Factoring costs $ 10.2 $ 3.5 $ 4.8  
Two Customers | Trade Receivable | Customer Concentration Risk        
Receivables [Line Items]        
Concentration risk 21.90%      
One Customer | Trade Receivable | Customer Concentration Risk        
Receivables [Line Items]        
Concentration risk   14.70%