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INCOME TAXES - Schedule of Reconciliations of the U.S. Federal Statutory Tax Rate (Details) | 12 Months Ended
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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%

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