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Financial Instruments - Pre-tax Effect of Derivative Instruments in Hedging Relationships on OCI (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2019
Derivative Instruments, Gain (Loss)
Net unrealized gains (losses) arising during the period	$ (50)	$ (40)	$ 308
Total	(83)	16	310
Foreign exchange contracts
Derivative Instruments, Gain (Loss)
Net unrealized gains (losses) arising during the period	(50)	(34)	307
Gains (Losses) Recognized in OCI on Derivatives in Net Investment Hedging Relationship	(33)	56	2
Interest rate contracts
Derivative Instruments, Gain (Loss)
Net unrealized gains (losses) arising during the period	$ 0	$ (6)	$ 1

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Other Comprehensive Income (Loss), Derivative Cash Flow and Net Investment Hedges, Increase (Decrease), Before Adjustments and Tax

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Amount, before tax and reclassification, of gain (loss) from derivative instrument designated and qualifying cash flow hedge included in assessment of hedge effectiveness.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 20
-Section 45
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