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Pensions and Other Postretirement Benefits
 3 Months Ended
Mar. 31, 2019
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,
Pensions
 
Other Benefits
2019
 
2018
 
2019
 
2018
Service cost
$
1.1

 
$
1.7

 
$
—

 
$
—

Interest cost
12.2

 
11.4

 
0.2

 
0.1

Expected return on plan assets
(13.4
)
 
(15.8
)
 
—

 
—

Amortization of prior service cost (credit)
0.1

 
0.1

 
—

 
—

Recognized net actuarial and other (gain) loss
4.6

 
4.1

 
(0.2
)
 
(0.2
)
Recognized loss due to settlement (1)
—

 
0.9

 
—

 
—

Net periodic benefit cost (income)
$
4.6

 
$
2.4

 
$
—

 
$
(0.1
)

____________________
(1)
Settlement charge relates to the U.S. nonqualified defined benefit pension plan.

We did not make any voluntary cash contributions to our U.S. defined benefit pension plan in the three months ended March 31, 2019. We expect to make approximately $7 million in voluntary cash contributions to our U.S. defined benefit pension plan during 2019.