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Goodwill (Tables)
 9 Months Ended
Sep. 30, 2012
Goodwill Abstract  
Changes in Goodwill Carrying Amounts
The changes in the carrying amount of goodwill for the nine months ended September 30, 2012 were as follows:  
In millions
Climate
Solutions
 
Residential
Solutions
 
Industrial
Technologies
 
Security
Technologies
 
Total
December 31, 2011 (gross)
$
5,342.8

 
$
2,328.0

 
$
366.8

 
$
906.4

 
$
8,944.0

Acquisitions and adjustments
0.3

 
—

 
—

 
—

 
0.3

Currency translation
4.8

 
—

 
0.6

 
2.8

 
8.2

September 30, 2012 (gross)
5,347.9

 
2,328.0

 
367.4

 
909.2

 
8,952.5

Accumulated impairment *
(839.8
)
 
(1,656.2
)
 
—

 
(344.0
)
 
(2,840.0
)
Goodwill (net)
$
4,508.1

 
$
671.8

 
$
367.4

 
$
565.2

 
$
6,112.5

* No impairment charges were recorded by the Company in 2012.