Other income (expense), net included: | | | | | | | | | | | | | | | | | | Three Months Ended June 30, | | Six Months Ended June 30, | | 2015 | | 2014 | | 2015 | | 2014 | | | | | | | | | | (in millions) | Interest income | $ | 1 |
| | $ | 2 |
| | $ | 2 |
| | $ | 4 |
| Loss on extinguishment of debt | — |
| | — |
| | (52 | ) | | (34 | ) | Costs associated with acquisitions | (1 | ) | | — |
| | (1 | ) | | — |
| Gain on insurance recovery | — |
| | — |
| | — |
| | 14 |
| Other, net | (2 | ) | | 1 |
| | (5 | ) | | 2 |
| Other (expense) income, net | $ | (2 | ) | | $ | 3 |
| | $ | (56 | ) | | $ | (14 | ) |
|