The following table presents changes in accumulated other comprehensive loss by component, net of tax, for the six months ended June 30, 2018 and 2017, respectively: | | | | | | | | | | | | | | | | | | | | | | | | | | Defined Benefit Plans | | Foreign Currency Translation | | Gain on Cash Flow Hedges | | Accumulated Other Comprehensive Loss | | Employee
Benefit Plan
Funded Status | | Amortization
of Prior
Service Cost | | Amortization
of Actuarial
(Gain) Loss | | | | Beginning balance as of December 31, 2017 | $ | (140 | ) | | $ | 1 |
| | $ | 49 |
| | $ | 1 |
| | $ | 10 |
| | $ | (79 | ) | Other comprehensive income before reclassifications | — |
| | — |
| | — |
| | — |
| | 6 |
| | 6 |
| Amounts reclassified from accumulated other comprehensive loss | — |
| | — |
| | 4 |
| | — |
| | — |
| | 4 |
| Net other comprehensive income (loss) | — |
| | — |
| | 4 |
| | — |
| | 6 |
| | 10 |
| Ending balance as of June 30, 2018 | $ | (140 | ) | | $ | 1 |
| | $ | 53 |
| | $ | 1 |
| | $ | 16 |
| | $ | (69 | ) | | | | | | | | | | | | | Beginning balance as of December 31, 2016 | $ | (147 | ) | | $ | 1 |
| | $ | 42 |
| | $ | 2 |
| | $ | 16 |
| | $ | (86 | ) | Other comprehensive loss before reclassifications | — |
| | — |
| | — |
| | (1 | ) | | (2 | ) | | (3 | ) | Amounts reclassified from accumulated other comprehensive loss | — |
| | — |
| | 4 |
| | — |
| | — |
| | 4 |
| Net other comprehensive income (loss) | — |
| | — |
| | 4 |
| | (1 | ) | | (2 | ) | | 1 |
| Ending balance as of June 30, 2017 | $ | (147 | ) | | $ | 1 |
| | $ | 46 |
| | $ | 1 |
| | $ | 14 |
| | $ | (85 | ) |
|