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Pension and Postretirement Benefits (Tables)
3 Months Ended
Mar. 31, 2024
Retirement Benefits [Abstract]  
Components of Net Periodic Cost for Pension and Postretirement Benefits
Components of the net periodic cost for pension and postretirement benefits for the three months ended March 31, 2024 and 2023 were as follows:
U.S.
Defined Benefit Plans
Non-U.S.
Defined Benefit Plans
Postretirement
Medical Benefits
(Amounts in millions) 202420232024202320242023
Service cost$5.7 $5.0 $1.3 $1.1 $— $— 
Interest cost5.4 5.2 3.0 2.9 0.2 0.2 
Expected return on plan assets(6.0)(6.3)(1.9)(1.6)— — 
Amortization of unrecognized prior service cost and other costs— — 0.1 0.1 — — 
Amortization of unrecognized net loss — — 0.6 0.3 — — 
Net periodic cost recognized$5.1 $3.9 $3.1 $2.8 $0.2 $0.2