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RETIREMENT PLANS AND POSTRETIREMENT BENEFITS (Tables)
6 Months Ended
Jun. 30, 2024
Retirement Benefits [Abstract]  
Schedule of Net Periodic (Benefit) Cost
($ in millions)Three Months Ended June 30, 2024Six Months Ended June 30, 2024
Interest cost$5.6 $13.2 
Expected return on plan assets(6.2)(14.4)
Net periodic benefit
$(0.6)$(1.2)