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Retirement, Pension and Other Postretirement Plans - Allocation of Pension Plan Assets (Detail) - Pension Plans	Oct. 31, 2020	Oct. 31, 2019
United States
Allocation of pension plan assets
Defined Benefit Plan, Actual Plan Asset Allocations	100.00%	100.00%
International
Allocation of pension plan assets
Defined Benefit Plan, Actual Plan Asset Allocations	100.00%	100.00%
Equity securities | United States
Allocation of pension plan assets
Defined Benefit Plan, Actual Plan Asset Allocations	11.00%	11.00%
Debt securities | United States
Allocation of pension plan assets
Defined Benefit Plan, Actual Plan Asset Allocations	49.00%	53.00%
Insurance contracts | International
Allocation of pension plan assets
Defined Benefit Plan, Actual Plan Asset Allocations	54.00%	54.00%
Pooled investment funds | United States
Allocation of pension plan assets
Defined Benefit Plan, Actual Plan Asset Allocations	39.00%	35.00%
Pooled investment funds | International
Allocation of pension plan assets
Defined Benefit Plan, Actual Plan Asset Allocations	44.00%	45.00%
Other | United States
Allocation of pension plan assets
Defined Benefit Plan, Actual Plan Asset Allocations	1.00%	1.00%
Other | International
Allocation of pension plan assets
Defined Benefit Plan, Actual Plan Asset Allocations	2.00%	1.00%

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- References

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- Definition

Percentage of actual investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(i)
-URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920

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