Balance as of December 31, 2011 | $ | (358 | ) |
Amounts recorded related to new acquisitions | (467 | ) | |
Other amounts recorded related to prior acquisitions | 2 | ||
Net fair value adjustments | 6 | ||
Payments made | 154 | ||
Balance as of December 31, 2012 | $ | (663 | ) |
Amounts recorded related to new acquisitions | — | ||
Other amounts recorded related to prior acquisitions | 1 | ||
Net fair value adjustments | (4 | ) | |
Payments made | 165 | ||
Balance as of December 31, 2013 | $ | (501 | ) |