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Pension and Postretirement Benefits
3 Months Ended
Mar. 31, 2021
Retirement Benefits [Abstract]  
Pension and Postretirement Benefits Pension and Postretirement Benefits
The components of net periodic benefit (income) expense costs recognized for the three months ended March 31, 2021 and 2020 were as follows:

Pension BenefitsPostretirement Benefits
Three Months Ended March 31,Three Months Ended March 31,
 2021202020212020
(In millions)
Service costs$1.1 $1.1 $— $— 
Interest costs0.3 0.5 — — 
Expected return on plan assets(3.1)(2.9)— — 
Recognized net actuarial loss0.2 0.5 0.1 0.1 
Net periodic benefit (income) expense$(1.5)$(0.8)$0.1 $0.1