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Other, Net (Tables)
 6 Months Ended
Jun. 30, 2015
Other Net [Abstract]  
Other, Net
The components of Other income/(expense), net for the three and six months ended June 30 were as follows:
 
Three months ended
 
Six months ended
In millions
2015

2014
 
2015
 
2014
Interest income
$
2.4

 
$
3.6

 
$
5.3

 
$
6.4

Exchange gain (loss)
(0.1
)
 
2.8

 
(32.4
)
 
(1.4
)
Income from equity investment
3.6

 
3.4

 
4.2

 
0.4

Other activity, net
16.1

 
(1.2
)
 
18.5

 
5.3

Other income/(expense), net
$
22.0

 
$
8.6

 
$
(4.4
)
 
$
10.7