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Retirement Benefits
 3 Months Ended
Mar. 31, 2022
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)20222021
Components of net periodic pension cost:
Service cost$— $0.1 
Interest cost0.5 0.5 
Expected return on plan assets(0.7)(0.8)
Amortization of net actuarial losses(a)
— 0.2 
Net periodic pension cost$(0.2)$— 

(a)Reflects amounts reclassified from accumulated other comprehensive income to net income.

In the three months ended March 31, 2022, we contributed $0.1 million to our defined benefit pension plans. In 2022, we expect to contribute approximately $0.1 million to our defined benefit pension plans.