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RETIREMENT PLANS AND POSTRETIREMENT BENEFITS (Tables)
9 Months Ended
Sep. 30, 2024
Retirement Benefits [Abstract]  
Schedule of Net Periodic (Benefit) Cost
($ in millions)Three Months Ended September 30, 2024Nine Months Ended September 30, 2024
Interest cost$7.8 $21.5 
Expected return on plan assets(8.5)(23.4)
Net periodic benefit
$(0.7)$(1.9)