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 |
|
