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Pensions and Other Postretirement Benefits
 3 Months Ended
Mar. 31, 2012
Notes to Financial Statements [Abstract]  
Pensions and Other Postretirement Benefits
Pensions and Other Postretirement Benefits

The components of net periodic benefit cost related to the Company sponsored defined benefit pension and other postretirement benefit plans (OPEB) for our employees are as follows:

 
Three Months Ended March 31
 
Pension Benefits
 
 
 
 
 
U.S. Plans
 
Non U.S. Plans
 
OPEB
 
2012
 
2011
 
2012
 
2011
 
2012
 
2011
 
(in millions of dollars)
Service Cost
$
12.2

 
$
10.6

 
$
1.2

 
$
1.2

 
$
0.4

 
$
0.5

Interest Cost
21.1

 
19.4

 
2.1

 
2.2

 
2.4

 
2.5

Expected Return on Plan Assets
(22.2
)
 
(21.9
)
 
(2.7
)
 
(3.1
)
 
(0.2
)
 
(0.2
)
Amortization of:
 
 
 
 
 
 
 
 
 
 
 
   Net Actuarial Loss
11.5

 
8.0

 
0.1

 
—

 
—

 
—

   Prior Service Credit
(0.1
)
 
(0.1
)
 
—

 
—

 
(0.6
)
 
(0.6
)
Total
$
22.5

 
$
16.0

 
$
0.7

 
$
0.3

 
$
2.0

 
$
2.2



We have no regulatory contribution requirements for our U.S. qualified defined benefit plan in 2012. For our U.K. operation, which maintains a separate defined benefit plan, we made required contributions of $1.1 million, or approximately £0.7 million, during the three months ended March 31, 2012.