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COMMITMENTS AND CONTINGENCIES (Tables)
 12 Months Ended
Sep. 30, 2025
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Environmental Loss Contingencies by Site The following is a summary of the environment remediation liability as of September 30, 2025 and 2024:
(in millions)
20252024
Environmental remediation liability
$5.4 $4.5 
Reported as:
Other current liabilities
1.8 0.8 
Other long-term liabilities
3.5 3.7 
Schedule of Expected Payments for Environmental Remediation Based on current estimates, the expected payments for environmental remediation for the next five years and thereafter at September 30, 2025, are as follows:
(in millions)
Amount
2026$2.0 
20272.5 
20280.2 
20290.3 
20300.4 
Thereafter
1.3 
Total payments6.7 
Amount representing interest1.3 
Total environmental obligation$5.4