COMMITMENTS AND CONTINGENCIES - Schedule of Expected Payments for Environmental Remediation (Details) - USD ($) $ in Millions	Sep. 30, 2025	Sep. 30, 2024
Accrual for Environmental Loss Contingencies, Fiscal Year Maturity [Abstract]
2026	$ 2.0
2027	2.5
2028	0.2
2029	0.3
2030	0.4
Thereafter	1.3
Total payments	6.7
Amount representing interest	1.3
Total environmental obligation	$ 5.4	$ 4.5

Total costs accrued as of the balance sheet date for environmental loss contingencies.

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Amount of imputed interest necessary to reduce (reconcile) the undiscounted amount of the accrual for environmental loss contingencies to the present value.

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Undiscounted amount of the accrual for environmental loss contingencies.

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Undiscounted amount of accrual for environmental loss contingency to be paid in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Undiscounted amount of accrual for environmental loss contingency to be paid in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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