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BENEFIT PLANS (Tables)
 9 Months Ended
Sep. 30, 2024
Retirement Benefits [Abstract]  
Schedule of Components of Net Periodic Benefit Cost
The following table sets forth the components of net periodic pension benefit cost:
Three Months Ended
September 30		Nine Months Ended
September 30
in millions2024202320242023
Service cost$0.4 $0.6 $1.8 $1.9 
Interest cost8.2 8.5 24.7 25.4 
Expected return on plan assets(7.0)(6.9)(21.1)(20.7)
Amortization of prior service cost0.2 0.4 0.7 1.1 
Amortization of actuarial loss1.4 1.4 3.8 4.2 
Net periodic pension benefit cost$3.2 $4.0 $9.9 $11.9 
Pretax amortization from AOCI$1.6 $1.8 $4.5 $5.3 
The following table sets forth the components of net periodic other postretirement benefit cost:
Three Months Ended
September 30		Nine Months Ended
September 30
in millions2024202320242023
Service cost$0.4 $0.5 $1.6 $1.5 
Interest cost0.6 0.5 1.7 1.5 
Amortization of prior service cost0.3 0.4 1.1 1.1 
Amortization of actuarial gain(0.1)(0.4)(0.5)(1.2)
Net periodic postretirement benefit cost $1.2 $1.0 $3.9 $2.9 
Pretax amortization from AOCI
$0.2 $0.0 $0.6 $(0.1)