Financial Instruments - Schedule of Pre-Tax Effect of Derivative Instruments and Related Hedged Items in a Fair Value Hedging Relationship (Details) - Interest and other, net - Interest rate contracts - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2022	Oct. 31, 2021	Oct. 31, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Total amounts of income/(expense) line items in the statement of financial performance in which the effects of fair value hedges are recorded	$ (235)	$ 2,209	$ (231)
Gain/(loss) recognized in earnings on derivative instruments	(62)	(17)	6
Gain/(loss) recognized in earnings on hedged item	$ 62	$ 17	$ (6)