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Other, Net (Tables)
 9 Months Ended
Sep. 30, 2019
Other Net [Abstract]  
Other, Net
The components of Other income/(expense), net for the three and nine months ended September 30 are as follows:
 
Three months ended
 
Nine months ended
In millions
2019

2018
 
2019
 
2018
Interest income (loss)
$
(0.4
)
 
$
0.1

 
$
2.2

 
$
6.3

Exchange gain (loss)
(5.1
)
 
(5.1
)
 
(8.8
)
 
(14.2
)
Other components of net periodic benefit cost
(8.2
)
 
(6.3
)
 
(28.6
)
 
(16.0
)
Other activity, net
6.5

 
2.8

 
12.6

 
7.9

Other income/(expense), net
$
(7.2
)
 
$
(8.5
)
 
$
(22.6
)
 
$
(16.0
)