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EMPLOYEE BENEFIT PLANS - Summary of Projected Benefit Obligations, Accumulated Benefit Obligations, and Fair Value of Plan Assets (Details) - USD ($)
$ in Millions
Sep. 30, 2023
Sep. 30, 2022
U.S. Plans    
Defined Benefit Plan Disclosure [Line Items]    
Projected benefit obligation $ 50.9 $ 53.5
Accumulated benefit obligation 50.9 53.5
Fair value of plan assets 49.0 50.3
Non U.S. Plan    
Defined Benefit Plan Disclosure [Line Items]    
Projected benefit obligation 57.0 51.8
Accumulated benefit obligation 57.0 49.0
Fair value of plan assets $ 43.5 $ 39.2