AMGEN INC | 2013 | FY | 3


The changes in carrying amounts of contingent consideration obligations for the years ended December 31, 2013 and 2012, were as follows (in millions):
 
2013
 
2012
Beginning balance
$
221

 
$
190

Additions from Onyx acquisition
261

 

Net changes in valuation
113

 
31

Ending balance
$
595

 
$
221


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