Supplementary Financial Information - Schedule of Trade Receivables Sold and Cash Received (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2025	Jan. 31, 2024
Trade Receivables Sold and Cash Received [Roll Forward]
Balance at beginning of period	$ 284	$ 141
Trade receivables sold	3,049	3,298
Cash receipts	(3,191)	(3,232)
Foreign currency and other	(9)	5
Balance at end of period	$ 133	$ 212