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Pensions and Other Postretirement Benefits (Tables)
 3 Months Ended
Mar. 31, 2012
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]  
Net Periodic Benefit Costs
 
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