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Post Retirement Benefit Plans - Actuarial Assumptions Used for the Measurement of Benefit Obligations and Pension Costs (Detail) | Oct. 31, 2015 | Oct. 31, 2014 | Oct. 31, 2013
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Pension Plans, Postretirement and Other Employee Benefits [Line Items] |  |  |
Actuarial assumptions used to measure the year-end benefit obligations and the pension costs | 3.71% | 3.69% | 4.30%
USA [Member] |  |  |
Pension Plans, Postretirement and Other Employee Benefits [Line Items] |  |  |
Actuarial assumptions used to measure the year-end benefit obligations and the pension costs | 4.37% | 4.22% | 4.75%
Postretirement Health Care and Life Insurance Benefits [Member] |  |  |
Pension Plans, Postretirement and Other Employee Benefits [Line Items] |  |  |
Actuarial assumptions used to measure the year-end benefit obligations and the pension costs | 4.65% | 4.45% |
Postretirement Health Care and Life Insurance Benefits [Member] | USA [Member] |  |  |
Pension Plans, Postretirement and Other Employee Benefits [Line Items] |  |  |
Actuarial assumptions used to measure the year-end benefit obligations and the pension costs | 3.88% | 3.70% |
South Africa [Member] | Postretirement Health Care and Life Insurance Benefits [Member] | Non-United States [Member] |  |  |
Pension Plans, Postretirement and Other Employee Benefits [Line Items] |  |  |
Actuarial assumptions used to measure the year-end benefit obligations and the pension costs | 9.20% | 8.20% |

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- Definition Defined benefit plan assumptions used calculating benefit obligation and net periodic pension costs discount rate. + References No definition available. + Details
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- Definition Pension plans, postretirement and other employee benefits. + References No definition available. + Details
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- Details
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