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BENEFIT PLANS - Schedule of Components of Net Periodic Benefit Cost- Other Postretirement Benefits (Details) - Other Postretirement Benefit Plans, Defined Benefit - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]    
Service cost $ 0.6 $ 0.6
Interest cost 0.5 0.5
Amortization of prior service cost 0.4 0.4
Amortization of actuarial gain (0.3) (0.2)
Net periodic pension benefit cost 1.2 1.3
Pretax amortization from AOCI $ 0.1 $ 0.2