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Goodwill
 3 Months Ended
Mar. 31, 2012
Goodwill Abstract  
Goodwill
Goodwill
The changes in the carrying amount of goodwill for the three months ended March 31, 2012 were as follows:  
In millions
Climate
Solutions
 
Residential
Solutions
 
Industrial
Technologies
 
Security
Technologies
 
Total
December 31, 2011 (gross)
$
5,343.9

 
$
2,328.0

 
$
366.8

 
$
906.4

 
$
8,945.1

Acquisitions and adjustments
0.3

 
—

 
—

 
—

 
0.3

Currency translation
32.7

 
—

 
2.1

 
7.0

 
41.8

March 31, 2012 (gross)
5,376.9

 
2,328.0

 
368.9

 
913.4

 
8,987.2

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

 
(344.0
)
 
(2,840.0
)
Goodwill (net)
$
4,537.1

 
$
671.8

 
$
368.9

 
$
569.4

 
$
6,147.2

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