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EXIT AND DISPOSAL ACTIVITIES - Schedule of Restructuring and Related Charges (Details) - USD ($)
$ in Millions
 12 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2023
Restructuring Cost and Reserve [Line Items]      
Restructuring charges $ 8.8 $ 1.0 $ 9.3
Cost of goods sold      
Restructuring Cost and Reserve [Line Items]      
Restructuring charges $ 0.0 $ 0.0 $ 0.6
Restructuring Charges, Statement of Income or Comprehensive Income [Extensible Enumeration] Cost of goods sold Cost of goods sold Cost of goods sold
Selling, general & administrative expense      
Restructuring Cost and Reserve [Line Items]      
Restructuring charges $ 8.8 $ 1.0 $ 8.7
Restructuring Charges, Statement of Income or Comprehensive Income [Extensible Enumeration] Selling, general & administrative Selling, general & administrative Selling, general & administrative