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Pensions and Other Postretirement Benefits
 9 Months Ended
Sep. 30, 2025
Retirement Benefits [Abstract]  
Pensions and Other Postretirement Benefits Pensions and Other Postretirement Benefits
The following table summarizes the components of net annual benefit cost (income):
(in Millions)Three Months Ended September 30,Nine Months Ended September 30,
PensionsOther BenefitsPensionsOther Benefits
20252024202520242025202420252024
Service cost$0.3 $0.1 $— $— $1.0 $1.6 $— $— 
Interest cost11.9 12.0 0.1 0.1 35.8 35.9 0.3 0.3 
Expected return on plan assets(11.9)(11.1)— — (36.0)(33.5)— — 
Amortization of net actuarial and other (gain) loss3.2 3.6 (0.3)(0.3)10.1 10.6 (0.8)(0.7)
Recognized (gain) loss due to curtailments, settlements, and other0.1 0.1 — — 0.3 0.3 — — 
Net periodic benefit cost (income)$3.6 $4.7 $(0.2)$(0.2)$11.2 $14.9 $(0.5)$(0.4)