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Goodwill
3 Months Ended
Mar. 31, 2012
Goodwill  
Goodwill

4.  Goodwill

 

The change in the carrying amount of goodwill for the three months ended March 31, 2012 is as follows:

 

 

 

(in millions)

 

Balance as of December 31, 2011

 

$

1,244.3

 

Acquisition

 

3.1

 

Effect of foreign currency translation

 

2.2

 

Balance as of March 31, 2012

 

$

1,249.6

 

 

We had no accumulated impairment losses related to goodwill as of March 31, 2012.