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Business Segment Information (Tables)
 9 Months Ended
Sep. 30, 2017
Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]  
Summary of Operations by Reportable Segments
A summary of operations by reportable segment for the three and nine months ended September 30 was as follows:
 
Three months ended

Nine months ended
In millions
2017
 
2016
 
2017
 
2016
Net revenues
 
 
 
 
 
 
 
Climate
$
2,939.3

 
$
2,838.1

 
$
8,407.2

 
$
7,986.4

Industrial
731.2

 
729.7

 
2,172.3

 
2,163.7

Total
$
3,670.5

 
$
3,567.8

 
$
10,579.5

 
$
10,150.1

Segment operating income
 
 
 
 
 
 
 
Climate
$
480.1

 
$
474.7

 
$
1,224.5

 
$
1,188.8

Industrial
89.0

 
80.9

 
247.0

 
215.0

Unallocated corporate expense
(63.0
)
 
(43.9
)
 
(192.8
)
 
(153.4
)
Operating income
$
506.1

 
$
511.7

 
$
1,278.7

 
$
1,250.4