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Pensions and Other Postretirement Benefits
 3 Months Ended
Mar. 31, 2013
Pensions and Other Postretirement Benefits [Abstract]  
Pension and Other Postretirement Benefits
Pensions and Other Postretirement Benefits
The following table summarizes the components of net annual benefit cost (income) for the three months ended March 31, 2013 and 2012:
(in Millions)
Three Months Ended March 31
Pensions
 
Other Benefits
2013
 
2012
 
2013
 
2012
Components of net annual benefit cost (income):
 
 
 
 
 
 
 
Service cost
$
5.4

 
$
5.1

 
$
—

 
$
—

Interest cost
14.5

 
15.3

 
0.3

 
0.3

Expected return on plan assets
(19.2
)
 
(19.2
)
 
—

 
—

Amortization of prior service cost (credit)
0.5

 
0.5

 
—

 
—

Recognized net actuarial and other (gain) loss
17.5

 
13.2

 
(0.4
)
 
(0.5
)
Net periodic benefit cost from continuing operations
$
18.7

 
$
14.9

 
$
(0.1
)
 
$
(0.2
)

We made voluntary cash contributions to our U.S. defined benefit pension plan of $13.0 million in the three months ended March 31, 2013. We expect that our total voluntary cash contributions to the plan for 2013 will be approximately $40 million.