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Other, Net (Tables)
 12 Months Ended
Dec. 31, 2012
Other Net [Abstract]  
Other, Net
At December 31, the components of Other, net were as follows:
 
In millions
 
2012
 
2011
 
2010
Interest income
 
$
16.3

 
$
25.9

 
$
15.2

Exchange gain (loss)
 
(2.8
)
 
2.8

 
0.9

Earnings (loss) from equity investments
 
(5.9
)
 
(3.5
)
 
—

Other
 
17.4

 
7.8

 
16.4

Other, net
 
$
25.0

 
$
33.0

 
$
32.5