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Taxes on Earnings - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2019
Income Tax Examination [Line Items]
Net income tax charges (benefits)	$ (294)	$ (362)	$ 152
Income tax benefits on restructuring charges, separation costs, transformation costs and acquisition and other related charges	180	174
Change in enacted tax rate	39	40
Pre-Separation tax matters	32	66	274
Litigation settlement and early debt prepayment premium	337
Income tax charges related to change in valuation allowance	244
Tax expense due to litigation settlement	93
Tax charges related to changes in valuation allowances as a result of the Tax Act			488
Income tax charges related to future withholding costs on intercompany distributions			40
Income tax benefits from transformation costs, acquisition, disposition and other related charges			104
Income tax benefits, reduced rates for subsidiaries in certain countries	$ 889	$ 521	$ 837
Income tax benefits, reduced rates for subsidiaries in certain countries (in dollars per share)	$ 0.67	$ 0.40	$ 0.61
Undistributed earnings from non-U.S. operations	$ 8,900
Tax Matter Agreement, cash received during period	50	$ 50	$ 200
Foreign
Income Tax Examination [Line Items]
Change in enacted tax rate	$ 157
Foreign | India
Income Tax Examination [Line Items]
Change in enacted tax rate		$ 57

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