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Other Expense (Income), Net (Tables)
 9 Months Ended
Sep. 30, 2014
Other Income and Expenses [Abstract]  
Schedule of other expense
Items included in other expense (income), net consist of:
 
Three Months Ended
September 30,
 
Nine Months Ended
September 30,
(millions of dollars)
2014
 
2013
 
2014
 
2013
Restructuring expense
$
13.1

 
$
—

 
$
67.6

 
$
—

Pension settlement
2.7

 
—

 
2.7

 
—

Program termination agreement
—

 
—

 
—

 
11.3

Retirement related obligations
—

 
—

 
—

 
5.9

Other income
(3.5
)
 
(3.7
)
 
(8.2
)
 
(6.4
)
Other expense (income), net
$
12.3

 
$
(3.7
)
 
$
62.1

 
$
10.8