Supplementary Financial Information - Schedule of Transferred Trade Receivables Not Collected from Third Parties (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2022	Apr. 30, 2021
Trade Receivables Sold and Cash Received [Roll Forward]
Balance at beginning of period	$ 121	$ 207	$ 131	$ 188
Trade receivables sold	3,002	2,947	5,969	6,489
Cash receipts	(2,941)	(2,940)	(5,914)	(6,472)
Foreign currency and other	(9)	(2)	(13)	7
Balance at end of period	$ 173	$ 212	$ 173	$ 212