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Goodwill (Tables)
3 Months Ended
Mar. 31, 2012
Goodwill  
Schedule of changes in the carrying amount of goodwill

 

 

 

 

(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