Retirement and Post-Retirement Benefit Plans - Narrative (Details) $ in Millions	9 Months Ended
Jul. 31, 2018 USD ($)
Post-Retirement Benefit Plans
Retirement and post-retirement benefit plans
Anticipated contributions	$ 7
Contributions to benefit plans	3
Non-U.S. \| Defined Benefit Plans
Retirement and post-retirement benefit plans
Anticipated contributions	33
Contributions to benefit plans	21
U.S. \| Non-qualified plan
Retirement and post-retirement benefit plans
Anticipated contributions	33
Contributions to benefit plans	$ 25

Amount of contribution received by defined benefit plan from employer which increases plan assets.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
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Name:	us-gaap_DefinedBenefitPlanContributionsByEmployer
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration