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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
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

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- Definition

Pension plans, postretirement and other employee benefits.

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