v3.26.3
ENVIRONMENTAL (Details) - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Sep. 30, 2025
Environmental Remediation Obligations [Abstract]      
Accrued Environmental Loss Contingencies, Current $ 30.0 $ 30.0 $ 30.0
Reserves for future environmental expenditures - noncurrent 126.8 126.3 124.7
Reserves for future environmental expenditures - total $ 156.8 $ 156.3 $ 154.7