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Pensions and Other Postretirement Benefits
 3 Months Ended
Mar. 31, 2021
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 March 31,
PensionsOther Benefits
2021202020212020
Service cost$1.3 $0.9 $— $— 
Interest cost6.1 9.1 0.1 0.1 
Expected return on plan assets(7.1)(9.3)— — 
Amortization of prior service cost (credit)0.1 0.1 — — 
Recognized net actuarial and other (gain) loss5.9 2.5 (0.2)(0.2)
Net periodic benefit cost (income)$6.3 $3.3 $(0.1)$(0.1)