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Taxes on Earnings (Details) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2021 USD ($) country	Apr. 30, 2020 USD ($)	Apr. 30, 2021 USD ($) country	Apr. 30, 2020 USD ($)
Income Tax Disclosure [Abstract]
Effective tax rate (percent)	8.10%	7.60%	12.70%	15.40%
Net tax benefit	$ 128	$ 59	$ 129	$ 66
Tax benefits related to intra-entity asset transfer	89		89
Tax benefits related to restructuring charges	8	7	36	55
Tax benefits related to audit settlements	23	42	11	40
Tax benefits related to other items	12		5
Tax benefits related to acquisition charges		11		17
Uncertain tax position charges	4	3	12	51
Unrecognized tax benefits	815		815
Unrecognized tax benefits that would affect effective tax rate if realized	645		645
Unrecognized tax benefits change			5
Accrued income tax payable for interest and penalties	66	$ 29	$ 66	$ 29
Likelihood of no resolution period			12 months
Reasonably possible decrease in existing unrecognized tax benefits within the next 12 months	$ 108		$ 108
Other countries with income tax jurisdiction | country	60		60

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