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STOCK-BASED COMPENSATION - Summary of the Status of Performance Share Units (Details) - Performance Share Units - $ / shares
 12 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2020
Shares      
Outstanding (in shares) 699,000 337,000 145,000
Granted (in shares) 227,000 313,000 259,000
Vested (in shares) 161,000    
Dividend equivalent right performance units credited (in shares) 15,000 60,000 0
Forfeited (in shares) (54,000) (11,000) (67,000)
Outstanding (in shares) 726,000 699,000 337,000
Weighted-Average Grant Date Fair Value per Share      
Outstanding (in dollars per share) $ 41.55 $ 51.09 $ 62.66
Granted (in dollars per share) 30.12 29.77 43.40
Vested (in dollars per share) 62.66    
Dividend equivalent right performance units credited (in dollars per share) 32.82 49.64 0
Forfeited (in dollars per share) 34.16 43.40 46.35
Outstanding (in dollars per share) $ 33.67 $ 41.55 $ 51.09
Vested (in shares) 161,000    
Shares where performance criteria has been achieved (in shares) 96,819    
Vested and expected to vest (in shares) 1,145,726