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Pension and Retiree Medical Benefits | 8 Months Ended
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Sep. 05, 2015
Compensation and Retirement Disclosure [Abstract] |
Pension and Retiree Medical Benefits | Pension and Retiree Medical Benefits The components of net periodic benefit cost for pension and retiree medical plans are as follows:
| 12 Weeks Ended
| Pension |  | Retiree Medical
| 9/5/2015 |  |  | 9/6/2014 |  |  | 9/5/2015 |  |  | 9/6/2014 |  |  | 9/5/2015 |  |  | 9/6/2014 |
| U.S. |  | International |  |
Service cost | $ | 100 |  |  | $ | 91 |  |  | $ | 25 |  |  | $ | 24 |  |  | $ | 8 |  |  | $ | 8 |
Interest cost | 126 |  |  | 134 |  |  | 30 |  |  | 33 |  |  | 12 |  |  | 14 |
Expected return on plan assets | (195 | ) |  | (181 | ) |  | (44 | ) |  | (44 | ) |  | (6 | ) |  | (6 | )
Amortization of prior service (credit)/cost | (1 | ) |  | 5 |  |  | — |  |  | — |  |  | (9 | ) |  | (5 | )
Amortization of net losses/(gains) | 47 |  |  | 40 |  |  | 18 |  |  | 14 |  |  | — |  |  | (2 | )
| 77 |  |  | 89 |  |  | 29 |  |  | 27 |  |  | 5 |  |  | 9 |
Settlement loss | — |  |  | — |  |  | 3 |  |  | 3 |  |  | — |  |  | — |
Special termination benefits | 4 |  |  | 3 |  |  | — |  |  | — |  |  | — |  |  | 1 |
Total expense | $ | 81 |  |  | $ | 92 |  |  | $ | 32 |  |  | $ | 30 |  |  | $ | 5 |  |  | $ | 10 |
| 36 Weeks Ended
| Pension |  | Retiree Medical
| 9/5/2015 |  |  | 9/6/2014 |  |  | 9/5/2015 |  |  | 9/6/2014 |  |  | 9/5/2015 |  |  | 9/6/2014 |
| U.S. |  | International |  |
Service cost | $ | 301 |  |  | $ | 272 |  |  | $ | 70 |  |  | $ | 67 |  |  | $ | 24 |  |  | $ | 24 |
Interest cost | 378 |  |  | 402 |  |  | 81 |  |  | 90 |  |  | 36 |  |  | 42 |
Expected return on plan assets | (588 | ) |  | (543 | ) |  | (122 | ) |  | (120 | ) |  | (18 | ) |  | (18 | )
Amortization of prior service (credit)/cost | (2 | ) |  | 14 |  |  | — |  |  | — |  |  | (27 | ) |  | (15 | )
Amortization of net losses/(gains) | 142 |  |  | 121 |  |  | 50 |  |  | 36 |  |  | 1 |  |  | (4 | )
| 231 |  |  | 266 |  |  | 79 |  |  | 73 |  |  | 16 |  |  | 29 |
Settlement loss | — |  |  | — |  |  | 3 |  |  | 3 |  |  | — |  |  | — |
Special termination benefits | 9 |  |  | 11 |  |  | — |  |  | — |  |  | 1 |  |  | 2 |
Total expense | $ | 240 |  |  | $ | 277 |  |  | $ | 82 |  |  | $ | 76 |  |  | $ | 17 |  |  | $ | 31 |
We regularly evaluate different opportunities to reduce risk and volatility associated with our pension and retiree medical plans. During the second quarter of 2014, we made discretionary contributions of $19 million to our international pension plans.

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