EMPLOYEE BENEFIT PLANS - Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Amortization of Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other non-operating expense (income), net	Other non-operating expense (income), net	Other non-operating expense (income), net
U.S. Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 0.5	$ 0.5	$ 0.7
Interest cost	1.9	1.8	2.2
Expected return on assets	(3.2)	(3.7)	(4.1)
Settlements and curtailments	0.0	0.0	0.9
Recognized net actuarial loss	0.8	1.4	0.9
Net periodic benefit cost	$ 0.0	$ 0.0	$ 0.6
Weighted average assumptions
Discount rate	2.70%	2.46%	3.04%
Expected return on plan assets	5.00%	6.00%	6.50%
Non U.S. Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 1.2	$ 1.5	$ 1.7
Interest cost	2.1	2.1	1.9
Expected return on assets	(4.0)	(4.0)	(3.8)
Settlements and curtailments	0.0	0.0	0.0
Recognized net actuarial loss	2.8	3.4	3.7
Net periodic benefit cost	$ 2.1	$ 3.0	$ 3.5
Weighted average assumptions
Rate of compensation increase	2.50%	2.25%
Non U.S. Plans | Minimum
Weighted average assumptions
Discount rate	1.00%	0.70%	0.75%
Expected return on plan assets	0.99%	0.70%	3.07%
Non U.S. Plans | Maximum
Weighted average assumptions
Discount rate	2.00%	1.75%	1.80%
Expected return on plan assets	4.06%	3.40%	3.40%
Rate of compensation increase			2.25%