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EMPLOYEE RETIREMENT AND POSTRETIREMENT BENEFITS
 3 Months Ended
Mar. 31, 2025
Retirement Benefits [Abstract]  
EMPLOYEE RETIREMENT AND POSTRETIREMENT BENEFITS
15. EMPLOYEE RETIREMENT AND POSTRETIREMENT BENEFITS

Pension, Profit Sharing, and Postretirement Benefits — Certain employees and retirees participate in pension and other postretirement benefit plans. Employee benefit plan obligations and expenses included in the Condensed Consolidated Financial Statements are determined based on plan assumptions, employee demographic data, including years of service and compensation, benefits and claims paid, and employer contributions.

Components of net periodic pension cost are as follows:
 
Three Months Ended
March 31,
 20252024
 (In millions)
Service cost$0.1 $0.1 
Interest cost2.7 2.6 
Expected return on plan assets(2.9)(2.7)
Amortization of unrecognized net loss0.1 0.1 
Net periodic pension cost
$— $0.1 

Components of net periodic postretirement cost are as follows:
Three Months Ended
March 31,
 20252024
 (In millions)
Interest cost$0.2 $0.2 
Amortization of unrecognized net gain(0.1)(0.1)
Net periodic postretirement cost$0.1 $0.1 

The service cost components of net periodic pension costs were recognized in Cost of sales, and the other components of net periodic pension and postretirement costs were recognized in Other expense (income), net in the Condensed Consolidated Statements of Operations.