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Pension and Other Postretirement Plans | 9 Months Ended
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Jul. 31, 2016
Compensation And Retirement Disclosure [Abstract] |
Pension and Other Postretirement Plans |
6. | Pension and other postretirement plans
The components of net periodic pension cost for the three and nine months ended July 31, 2016 and July 31, 2015 were:
|  | U.S. |  |  | International |
Three Months Ended |  | 2016 |  |  | 2015 |  |  | 2016 |  |  | 2015 |
Service cost |  | $ | 2,873 |  |  | $ | 2,716 |  |  | $ | 723 |  |  | $ | 697 |
Interest cost |  |  | 3,983 |  |  |  | 3,761 |  |  |  | 600 |  |  |  | 641 |
Expected return on plan assets |  |  | (4,917 | ) |  |  | (4,579 | ) |  |  | (368 | ) |  |  | (405 | )
Amortization of prior service cost (credit) |  |  | 19 |  |  |  | 30 |  |  |  | (25 | ) |  |  | (22 | )
Amortization of net actuarial loss |  |  | 2,120 |  |  |  | 2,443 |  |  |  | 468 |  |  |  | 492 |
Total benefit cost |  | $ | 4,078 |  |  | $ | 4,371 |  |  | $ | 1,398 |  |  | $ | 1,403 |
|  | U.S. |  |  | International |
Nine Months Ended |  | 2016 |  |  | 2015 |  |  | 2016 |  |  | 2015 |
Service cost |  | $ | 8,618 |  |  | $ | 8,147 |  |  | $ | 2,143 |  |  | $ | 2,130 |
Interest cost |  |  | 11,949 |  |  |  | 11,284 |  |  |  | 1,822 |  |  |  | 1,940 |
Expected return on plan assets |  |  | (14,750 | ) |  |  | (13,737 | ) |  |  | (1,133 | ) |  |  | (1,217 | )
Amortization of prior service cost (credit) |  |  | 57 |  |  |  | 90 |  |  |  | (70 | ) |  |  | (68 | )
Amortization of net actuarial loss |  |  | 6,360 |  |  |  | 7,329 |  |  |  | 1,404 |  |  |  | 1,801 |
Settlement loss |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 1,275 |
Total benefit cost |  | $ | 12,234 |  |  | $ | 13,113 |  |  | $ | 4,166 |  |  | $ | 5,861 |
The components of other postretirement benefit cost for the three and nine months ended July 31, 2016 and July 31, 2015 were:
|  | U.S. |  |  | International |
Three Months Ended |  | 2016 |  |  | 2015 |  |  | 2016 |  |  | 2015 |
Service cost |  | $ | 212 |  |  | $ | 225 |  |  | $ | 4 |  |  | $ | 7 |
Interest cost |  |  | 731 |  |  |  | 744 |  |  |  | 5 |  |  |  | 9 |
Amortization of prior service credit |  |  | (67 | ) |  |  | (110 | ) |  |  | — |  |  |  | — |
Amortization of net actuarial (gain) loss |  |  | 171 |  |  |  | 289 |  |  |  | (6 | ) |  |  | — |
Total benefit cost |  | $ | 1,047 |  |  | $ | 1,148 |  |  | $ | 3 |  |  | $ | 16 |
|  | U.S. |  |  | International |
Nine Months Ended |  | 2016 |  |  | 2015 |  |  | 2016 |  |  | 2015 |
Service cost |  | $ | 637 |  |  | $ | 675 |  |  | $ | 12 |  |  | $ | 22 |
Interest cost |  |  | 2,192 |  |  |  | 2,232 |  |  |  | 17 |  |  |  | 27 |
Amortization of prior service credit |  |  | (201 | ) |  |  | (329 | ) |  |  | — |  |  |  | — |
Amortization of net actuarial (gain) loss |  |  | 514 |  |  |  | 866 |  |  |  | (18 | ) |  |  | — |
Total benefit cost |  | $ | 3,142 |  |  | $ | 3,444 |  |  | $ | 11 |  |  | $ | 49 |

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