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RESTRUCTURING CHARGES - Summary of Exit and Disposal Charges (Details) - USD ($)
$ in Millions
12 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2020
Restructuring Cost and Reserve [Line Items]      
Restructuring charges $ 59.8 $ 40.3 $ 71.6
Corporate      
Restructuring Cost and Reserve [Line Items]      
Restructuring charges 11.2 15.6 45.7
HPC | Operating Segments      
Restructuring Cost and Reserve [Line Items]      
Restructuring charges 10.0 9.1 4.6
GPC | Operating Segments      
Restructuring Cost and Reserve [Line Items]      
Restructuring charges 37.9 15.2 20.8
H&G | Operating Segments      
Restructuring Cost and Reserve [Line Items]      
Restructuring charges $ 0.7 $ 0.4 $ 0.5