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RETIREMENT PLANS AND POSTRETIREMENT BENEFITS - Schedule of Net Periodic (Benefit) Cost (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Retirement Benefits [Abstract]        
Interest cost $ 8.4 $ 5.6 $ 16.8 $ 13.2
Expected return on plan assets (10.8) (6.2) (21.7) (14.4)
Net periodic benefit $ (2.4) $ (0.6) $ (4.9) $ (1.2)