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Other, Net (Tables)
9 Months Ended
Sep. 30, 2011
Other Net [Abstract] 
Other, Net
The components of Other, net for the three and nine months ended September 30 are as follows:
 
Three months ended
 
Nine months ended
In millions
2011
 
2010
 
2011
 
2010
Interest income
$
8.0

 
$
2.8

 
$
19.8

 
$
10.4

Exchange gain (loss)
11.2

 
2.3

 
3.6

 
1.7

Other
2.1

 
3.6

 
5.2

 
10.2

Other, net
$
21.3

 
$
8.7

 
$
28.6

 
$
22.3