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Pensions and Other Postretirement Benefits (Tables)
6 Months Ended
Jun. 30, 2024
Retirement Benefits [Abstract]  
Schedule of Components of Net Annual Benefit Cost (Income)
The following table summarizes the components of net annual benefit cost (income):
(in Millions)Three Months Ended June 30,Six Months Ended June 30,
PensionsOther BenefitsPensionsOther Benefits
20242023202420232024202320242023
Service cost$0.7 $0.7 $— $— $1.5 $1.4 $— $— 
Interest cost11.9 12.5 0.1 0.2 23.9 25.1 0.2 0.3 
Expected return on plan assets(11.2)(11.8)— — (22.4)(23.7)— — 
Amortization of net actuarial and other (gain) loss3.5 3.9 (0.2)(0.2)7.0 7.9 (0.4)(0.4)
Recognized (gain) loss due to curtailments, settlements, and other0.1 — — — 0.2 — — — 
Net periodic benefit cost (income)$5.0 $5.3 $(0.1)$ $10.2 $10.7 $(0.2)$(0.1)