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Pension and Other Postretirement Plans - Other Postretirement Benefit Cost (Detail) - Postretirement Benefit Costs [Member] - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Apr. 30, 2020 | Apr. 30, 2019 | Apr. 30, 2020 | Apr. 30, 2019
United States [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Service cost | $ 143 | $ 165 | $ 333 | $ 331
Interest cost | 558 | 749 | 1,173 | 1,497
Amortization of prior service credit | (4) | (6) | (8) | (13)
Amortization of net actuarial (gain) loss | 258 | 152 | 677 | 304
Total benefit cost | 955 | 1,060 | 2,175 | 2,119
International [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Service cost | 4 | 6 | 7 | 9
Interest cost | 3 | 6 | 7 | 11
Amortization of net actuarial (gain) loss | (9) | (9) | (18) | (16)
Total benefit cost | $ (2) | $ 3 | $ (4) | $ 4

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- Definition Amount of prior service cost (credit) recognized in net periodic benefit cost (credit) of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=118257860&loc=d3e4179-114921 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(5) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a)(5) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920 + Details
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