PENSION AND POSTRETIREMENT PLANS - Schedule of Weighted-Average Assumptions used in Valuations of Pension Benefits (Details) - Pension Plan	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
U.S. Plans
Net pension expense
Discount rate used to determine service cost	5.29%	6.09%	5.66%
Discount rate used to determine interest cost	4.67%	5.94%	5.49%
Expected return on plan assets	6.50%	6.50%	6.00%
Rate of compensation increase	4.00%	4.00%	4.00%
Benefit obligations
Discount rate	5.27%	4.97%	6.03%
Rate of compensation increase	4.00%	4.00%	4.00%
Non-U.S. Plans
Net pension expense
Discount rate used to determine service cost	4.70%	5.20%	4.90%
Discount rate used to determine interest cost	4.70%	5.20%	4.90%
Expected return on plan assets	4.60%	4.70%	4.40%
Rate of compensation increase	3.90%	3.90%	4.00%
Benefit obligations
Discount rate	5.20%	4.70%	5.20%
Rate of compensation increase	4.10%	3.90%	3.90%