INCOME TAXES - Schedule of Reconciliations of the U.S. Federal Statutory Tax Rate (Details)	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Income Tax Disclosure [Abstract]
U.S. federal statutory rate	21.00%	21.00%	21.00%
State and local taxes, net of U.S. federal tax benefit	1.80%	0.60%	0.80%
Non-U.S. rate differential	1.20%	2.00%	0.80%
Non-U.S. tax holidays	(1.30%)	(1.70%)	(0.80%)
Research and development credits	(0.90%)	(1.20%)	(0.50%)
Foreign derived intangible income	(2.00%)	(3.80%)	(2.60%)
U.S. taxation of Non-U.S. Earnings	1.70%	2.10%	1.30%
Subsidiary restructuring	(0.20%)	(2.90%)	0.00%
Test & Measurement purchase accounting	0	0.017	0
Other	2.40%	2.80%	2.10%
Effective income tax rate	23.70%	20.60%	22.10%