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Retirement Benefits
3 Months Ended
Mar. 31, 2024
Retirement Benefits [Abstract]  
Retirement Benefits Retirement Benefits
The following table presents the components of net periodic pension cost and amounts recognized in other comprehensive income (loss) for our pension plans:
Three Months Ended
March 31,
(in millions)20242023
Components of net periodic pension cost:
Interest cost$0.3 $0.6 
Expected return on plan assets(0.4)(0.7)
Net periodic pension cost$(0.1)$(0.1)

In the three months ended March 31, 2024, we contributed $0.2 million to our defined benefit pension plans. In 2024, we expect to contribute approximately $0.2 million to our defined benefit pension plans.