Supplementary Financial Information - Schedule of Trade Receivables Sold and Cash Received (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2024	Apr. 30, 2023	Apr. 30, 2024	Apr. 30, 2023
Trade Receivables Sold and Cash Received [Roll Forward]
Balance at beginning of period	$ 212	$ 128	$ 141	$ 185
Trade receivables sold	2,846	3,179	6,145	6,857
Cash receipts	(2,873)	(3,136)	(6,106)	(6,888)
Foreign currency and other	(4)	3	1	20
Balance at end of period	$ 181	$ 174	$ 181	$ 174