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Pension and Other Postretirement Plans | 6 Months Ended
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Apr. 30, 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 six months ended April 30, 2016 and April 30, 2015 were:
|  | U.S. |  |  | International |
Three Months Ended |  | 2016 |  |  | 2015 |  |  | 2016 |  |  | 2015 |
Service cost |  | $ | 2,984 |  |  | $ | 3,031 |  |  | $ | 719 |  |  | $ | 692 |
Interest cost |  |  | 4,032 |  |  |  | 3,841 |  |  |  | 609 |  |  |  | 627 |
Expected return on plan assets |  |  | (4,914 | ) |  |  | (4,578 | ) |  |  | (377 | ) |  |  | (395 | )
Amortization of prior service cost (credit) |  |  | 19 |  |  |  | 30 |  |  |  | (24 | ) |  |  | (22 | )
Amortization of net actuarial loss |  |  | 2,314 |  |  |  | 2,633 |  |  |  | 471 |  |  |  | 485 |
Total benefit cost |  | $ | 4,435 |  |  | $ | 4,957 |  |  | $ | 1,398 |  |  | $ | 1,387 |
|  | U.S. |  |  | International |
Six Months Ended |  | 2016 |  |  | 2015 |  |  | 2016 |  |  | 2015 |
Service cost |  | $ | 5,745 |  |  | $ | 5,431 |  |  | $ | 1,420 |  |  | $ | 1,433 |
Interest cost |  |  | 7,966 |  |  |  | 7,523 |  |  |  | 1,222 |  |  |  | 1,299 |
Expected return on plan assets |  |  | (9,833 | ) |  |  | (9,158 | ) |  |  | (765 | ) |  |  | (812 | )
Amortization of prior service cost (credit) |  |  | 38 |  |  |  | 60 |  |  |  | (45 | ) |  |  | (46 | )
Amortization of net actuarial loss |  |  | 4,240 |  |  |  | 4,886 |  |  |  | 936 |  |  |  | 1,309 |
Settlement loss |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 1,275 |
Total benefit cost |  | $ | 8,156 |  |  | $ | 8,742 |  |  | $ | 2,768 |  |  | $ | 4,458 |
The components of other postretirement benefit cost for the three and six months ended April 30, 2016 and April 30, 2015 were:
|  | U.S. |  |  | International |
Three Months Ended |  | 2016 |  |  | 2015 |  |  | 2016 |  |  | 2015 |
Service cost |  | $ | 176 |  |  | $ | 175 |  |  | $ | 5 |  |  | $ | 7 |
Interest cost |  |  | 696 |  |  |  | 735 |  |  |  | 6 |  |  |  | 9 |
Amortization of prior service credit |  |  | (66 | ) |  |  | (109 | ) |  |  | — |  |  |  | — |
Amortization of net actuarial (gain) loss |  |  | 130 |  |  |  | 280 |  |  |  | (7 | ) |  |  | — |
Total benefit cost |  | $ | 936 |  |  | $ | 1,081 |  |  | $ | 4 |  |  | $ | 16 |
|  | U.S. |  |  | International |
Six Months Ended |  | 2016 |  |  | 2015 |  |  | 2016 |  |  | 2015 |
Service cost |  | $ | 425 |  |  | $ | 450 |  |  | $ | 8 |  |  | $ | 15 |
Interest cost |  |  | 1,461 |  |  |  | 1,488 |  |  |  | 12 |  |  |  | 18 |
Amortization of prior service credit |  |  | (133 | ) |  |  | (219 | ) |  |  | — |  |  |  | — |
Amortization of net actuarial (gain) loss |  |  | 342 |  |  |  | 577 |  |  |  | (12 | ) |  |  | — |
Total benefit cost |  | $ | 2,095 |  |  | $ | 2,296 |  |  | $ | 8 |  |  | $ | 33 |

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