Retirement and Post-Retirement Benefit Plans - Estimated Future Benefits Payments (Details) $ in Millions	Oct. 31, 2021 USD ($)
Defined Benefit Plans
Defined Benefit Plan, Plan Assets, Allocation [Line Items]
2022	$ 523
2023	524
2024	530
2025	561
2026	565
Next five fiscal years to October 31, 2031	3,027
Post-Retirement Benefit Plans
Defined Benefit Plan, Plan Assets, Allocation [Line Items]
2022	11
2023	12
2024	11
2025	11
2026	11
Next five fiscal years to October 31, 2031	$ 53

Amount of benefit for defined benefit plan expected to be paid in five fiscal years after fifth fiscal year following current fiscal year.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920

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Amount of benefit for defined benefit plan expected to be paid in next fiscal year following current fiscal year.

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Amount of benefit for defined benefit plan expected to be paid in fifth fiscal year following current fiscal year.

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Amount of benefit for defined benefit plan expected to be paid in fourth fiscal year following current fiscal year.

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Amount of benefit for defined benefit plan expected to be paid in third fiscal year following current fiscal year.

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Amount of benefit for defined benefit plan expected to be paid in second fiscal year following current fiscal year.

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