Retirement and Post-Retirement Benefit Plans - Narrative (Details) $ in Millions	6 Months Ended
Apr. 30, 2019 USD ($)
Post-Retirement Benefit Plans
Retirement and post-retirement benefit plans
Anticipated contributions	$ 6
Non-U.S. \| Defined Benefit Plans
Retirement and post-retirement benefit plans
Anticipated contributions	46
Contributions to benefit plans	15
U.S. \| Non-qualified plan
Retirement and post-retirement benefit plans
Anticipated contributions	32
Contributions to benefit plans	$ 17

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
-Topic 715
-SubTopic 20
-Section 55
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Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
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-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