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Pensions and Other Postretirement Benefits (Tables)
6 Months Ended
Jun. 30, 2023
Retirement Benefits [Abstract]  
Net Periodic Benefit Cost
Components of net periodic benefit cost for the three and six months ended June 30, 2023 and 2022 were as follows:
Pension and Other Postretirement Benefits
Three Months EndedSix Months Ended
June 30,June 30,
(In millions)2023202220232022
Service cost$7.1 $9.5 $14.2 $19.0 
Interest cost18.2 10.4 36.5 20.8 
Expected return on plan assets(16.4)(16.6)(32.8)(33.2)
Amortization of prior service costs— — — 0.1 
Recognized net actuarial (gains)/losses(5.0)0.1 (10.0)0.1 
Other4.4 — 4.4 — 
Net periodic benefit cost$8.3 $3.4 $12.3 $6.8