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EMPLOYEE BENEFIT PLANS
 3 Months Ended
Mar. 31, 2024
Retirement Benefits [Abstract]  
EMPLOYEE BENEFIT PLANS EMPLOYEE BENEFIT PLANS
The following table sets forth the aggregated net periodic benefit cost for all pension plans for the first quarters ended March 31, 2024 and March 31, 2023:
(In millions)Pension Benefits
First Quarter Ended
 March 31, 2024March 31, 2023
Service cost$0.1 $0.1 
Interest cost1.5 1.5 
Expected return on assets(1.9)(1.8)
Amortization of:
Prior service cost— — 
Actuarial loss0.6 0.6 
Settlement cost— — 
Net periodic benefit cost$0.3 $0.4 

The following table sets forth the aggregated net periodic benefit cost for the other post-retirement benefit plan for the first quarters ended March 31, 2024 and March 31, 2023:
(In millions)Other Benefits
First Quarter Ended
March 31, 2024March 31, 2023
Service cost$— $— 
Interest cost0.1 0.1 
Expected return on assets— — 
Amortization of:
Prior service cost— — 
Actuarial loss— — 
Settlement cost— — 
Net periodic benefit cost$0.1 $0.1