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	3 Months Ended
	Jan. 31, 2023	Jan. 31, 2022
Derivative Instruments, Gain (Loss)
Total amounts of income/(expense) line items in the statement of financial performance in which the effects of fair value hedges are recorded	$ (181)	$ (32)
Gain/(loss) recognized in earnings on derivative instruments	14	(11)
Gain/(loss) recognized in earnings on hedged item	$ (14)	$ 11