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Retirement Plans
 6 Months Ended
Jun. 30, 2020
Postemployment Benefits [Abstract]  
Retirement Plans Retirement Plans
The following table summarizes the components of net periodic benefit cost (income) for our defined benefit pension plans:
Three Months Ended June 30,
PensionsOther Benefits
In millions2020201920202019
Components of net periodic benefit cost (income):
Service cost (1)
$0.4  $0.4  $—  $—  
Interest cost (2)
0.3  0.2  —  —  
Expected return on plan assets (2)
(0.3) (0.2) —  —  
Amortization of net actuarial and other (gain) loss (2)
—  —  —  —  
Net periodic benefit cost (income)$0.4  $0.4  $—  $—  
Six Months Ended June 30,
PensionsOther Benefits
In millions2020201920202019
Components of net periodic benefit cost (income):
Service cost (1)
$0.8  $0.7  $—  $—  
Interest cost (2)
0.6  0.5  —  —  
Expected return on plan assets (2)
(0.6) (0.5) —  —  
Amortization of net actuarial and other (gain) loss (2)
—  —  —  —  
Net periodic benefit cost (income)$0.8  $0.7  $—  $—  
_______________
(1) Amounts are recorded to "Cost of sales" on our condensed consolidated statements of operations consistent with the employee compensation costs that participate in the plan.
(2) Amounts are recorded to "Other (income) expense, net" on our condensed consolidated statements of operations.

Contributions
        We did not make any voluntary cash contributions to our Union Hourly defined benefit pension plan in the six months ended June 30, 2020. There are no required cash contributions to our Union Hourly defined benefit pension plan in 2020, and we currently have no plans to make any voluntary cash contributions in 2020.