Supplementary Financial Information - Schedule of Trade Receivables Sold and Cash Received (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2024	Jul. 31, 2023	Jul. 31, 2024	Jul. 31, 2023
Trade Receivables Sold and Cash Received [Roll Forward]
Balance at beginning of period	$ 181	$ 174	$ 141	$ 185
Trade receivables sold	3,111	3,383	9,256	10,241
Cash receipts	(2,983)	(3,398)	(9,089)	(10,286)
Foreign currency and other	3	0	4	19
Balance at end of period	$ 312	$ 159	$ 312	$ 159