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Other, Net (Tables)
 9 Months Ended
Sep. 30, 2017
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
2017

2016
 
2017
 
2016
Interest income
$
2.3

 
$
0.8

 
$
6.7

 
$
5.4

Exchange gain (loss)
(2.0
)
 
(3.1
)
 
(3.5
)
 
6.2

Other components of net periodic benefit cost
(7.3
)
 
(8.0
)
 
(21.7
)
 
(24.2
)
Income (loss) from equity investment
—

 
—

 
—

 
(0.8
)
Income (loss) from Hussmann equity investment
—

 
—

 
—

 
397.8

Other activity, net
(0.6
)
 
4.0

 
(5.3
)
 
6.1

Other income/(expense), net
$
(7.6
)
 
$
(6.3
)
 
$
(23.8
)
 
$
390.5