Components of Net periodic benefit cost for the three and six months ended June 30, 2017 and 2016 were as follows: | | | | | | | | | | | | | | | | | | | | | | | | | | Pension Benefits | | Other Retiree Benefits | | United States | | International | | | | | | Three Months Ended June 30, | | 2017 | | 2016 | | 2017 | | 2016 | | 2017 | | 2016 | Service cost | $ | 1 |
| | $ | 1 |
| | $ | 3 |
| | $ | 4 |
| | $ | 4 |
| | $ | 3 |
| Interest cost | 23 |
| | 26 |
| | 5 |
| | 6 |
| | 10 |
| | 11 |
| ESOP offset | — |
| | — |
| | — |
| | — |
| | — |
| | (1 | ) | Expected return on plan assets | (28 | ) | | (28 | ) | | (5 | ) | | (6 | ) | | — |
| | — |
| Amortization of transition and prior service costs (credits) | — |
| | — |
| | — |
| | — |
| | — |
| | — |
| Amortization of actuarial loss (gain) | 12 |
| | 10 |
| | 3 |
| | 2 |
| | 4 |
| | 4 |
| Net periodic benefit cost | $ | 8 |
| | $ | 9 |
| | $ | 6 |
| | $ | 6 |
| | $ | 18 |
| | $ | 17 |
|
| | | | | | | | | | | | | | | | | | | | | | | | | | Pension Benefits | | Other Retiree Benefits | | United States | | International | | | | | | Six Months Ended June 30, | | 2017 | | 2016 | | 2017 | | 2016 | | 2017 | | 2016 | Service cost | $ | 1 |
| | $ | 1 |
| | $ | 7 |
| | $ | 8 |
| | $ | 8 |
| | $ | 6 |
| Interest cost | 47 |
| | 53 |
| | 10 |
| | 12 |
| | 21 |
| | 22 |
| ESOP offset | — |
| | — |
| | — |
| | — |
| | — |
| | (1 | ) | Expected return on plan assets | (55 | ) | | (55 | ) | | (10 | ) | | (11 | ) | | — |
| | — |
| Amortization of transition and prior service costs (credits) | — |
| | — |
| | — |
| | — |
| | — |
| | — |
| Amortization of actuarial loss (gain) | 24 |
| | 20 |
| | 5 |
| | 4 |
| | 8 |
| | 8 |
| Net periodic benefit cost | $ | 17 |
| | $ | 19 |
| | $ | 12 |
| | $ | 13 |
| | $ | 37 |
| | $ | 35 |
|
|