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Retirement and Post-Retirement Benefit Plans - Schedule of Defined Benefit Plans with Projected Benefit Obligations Exceeding Fair Value of Plan Assets (Details) - Defined Benefit Plans - USD ($) $ in Millions	Oct. 31, 2018	Oct. 31, 2017
U.S.
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Aggregate fair value of plan assets	$ 10,018	$ 10,838
Aggregate projected benefit obligation	11,167	12,266
Non-U.S.
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Aggregate fair value of plan assets	800	750
Aggregate projected benefit obligation	$ 1,194	$ 1,085

X

- Definition

Amount of plan asset for defined benefit pension plan with projected benefit obligation in excess of plan assets.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e2417-114920

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X

- Definition

Amount of projected benefit obligation for defined benefit pension plan with projected benefit obligation in excess of plan assets.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e2417-114920

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- Definition

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+ References

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