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Pensions and Postretirement Benefits
 3 Months Ended
Mar. 31, 2020
Retirement Benefits [Abstract]  
Pensions and Postretirement Benefits
Pensions and Postretirement Benefits
The components of net periodic benefit cost for our U.S. and foreign defined benefit pension and other postretirement plans for the three months ended March 31, 2020 and 2019, are as follows:
 
Pension Benefits
 
Other Benefits
 
2020
 
2019
 
2020
 
2019
 
(in millions)
Service cost
$
1.0

 
$
1.1

 
$
—

 
$
0.1

Interest cost
2.8

 
3.0

 
—

 
—

Expected return on plan assets
(4.7
)
 
(4.0
)
 
—

 
—

Amortization of net loss (gain)
1.3

 
1.6

 
(1.1
)
 
—

Curtailment loss
0.3

 
—

 
—

 
—

Net periodic benefit cost
$
0.7

 
$
1.7

 
$
(1.1
)
 
$
0.1


No contributions were made in the three months ended March 31, 2020 to our U.S. defined benefit pension plans and we currently do not expect to make any contributions in the remainder of 2020.