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Post Retirement Benefit Plans - Number of Participants in Defined Benefit Plans (Details) - Pension Plan - Participant | 12 Months Ended
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Oct. 31, 2019 | Oct. 31, 2018
Pension Plans, Postretirement and Other Employee Benefits [Line Items] |  |
Active participants (participant) | 2,455 | 1,332
Vested former employees and deferred members (participant) | 5,236 | 1,433
Retirees and beneficiaries (participant) | 6,462 | 2,389
Netherlands |  |
Pension Plans, Postretirement and Other Employee Benefits [Line Items] |  |
Active participants (participant) | 63 | 71
Vested former employees and deferred members (participant) | 97 | 95
Retirees and beneficiaries (participant) | 414 | 441
United Kingdom |  |
Pension Plans, Postretirement and Other Employee Benefits [Line Items] |  |
Active participants (participant) | 0 | 0
Vested former employees and deferred members (participant) | 366 | 419
Retirees and beneficiaries (participant) | 662 | 699
United States |  |
Pension Plans, Postretirement and Other Employee Benefits [Line Items] |  |
Active participants (participant) | 2,351 | 1,214
Vested former employees and deferred members (participant) | 4,643 | 790
Retirees and beneficiaries (participant) | 5,074 | 942
Germany |  |
Pension Plans, Postretirement and Other Employee Benefits [Line Items] |  |
Active participants (participant) | 41 | 47
Vested former employees and deferred members (participant) | 86 | 85
Retirees and beneficiaries (participant) | 258 | 253
Other International |  |
Pension Plans, Postretirement and Other Employee Benefits [Line Items] |  |
Active participants (participant) | 0 | 0
Vested former employees and deferred members (participant) | 44 | 44
Retirees and beneficiaries (participant) | 54 | 54

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