Financial Instruments - Schedule of Pre-Tax Effect of Derivative Instruments in Cash Flow Hedging Relationships (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2023	Apr. 30, 2022	Apr. 30, 2023	Apr. 30, 2022
Pre-tax effect of derivative instruments in cash flow hedging relationships
Gain/(loss) recognized in Accumulated other comprehensive loss on derivative	$ (66)	$ 603	$ (689)	$ 902
Total amounts of income/(expense) line items in the statement of financial performance in which the effects of cash flow hedges are recorded	762	1,278	1,527	2,637
Gain/(loss) reclassified from Accumulated  other comprehensive (loss) income into earnings	(162)	120	172	164
Cash flow hedges
Pre-tax effect of derivative instruments in cash flow hedging relationships
Gain/(loss) reclassified from Accumulated  other comprehensive (loss) income into earnings	(162)	120	172	164
Cash flow hedges | Net revenue
Pre-tax effect of derivative instruments in cash flow hedging relationships
Total amounts of income/(expense) line items in the statement of financial performance in which the effects of cash flow hedges are recorded	12,913	16,490	26,741	33,518
Gain/(loss) reclassified from Accumulated  other comprehensive (loss) income into earnings	(109)	142	277	199
Cash flow hedges | Cost of revenue
Pre-tax effect of derivative instruments in cash flow hedging relationships
Total amounts of income/(expense) line items in the statement of financial performance in which the effects of cash flow hedges are recorded	(9,984)	(13,157)	(21,003)	(26,800)
Gain/(loss) reclassified from Accumulated  other comprehensive (loss) income into earnings	(55)	(21)	(109)	(35)
Cash flow hedges | Other operating expenses
Pre-tax effect of derivative instruments in cash flow hedging relationships
Total amounts of income/(expense) line items in the statement of financial performance in which the effects of cash flow hedges are recorded	(2,167)	(2,055)	(4,211)	(4,081)
Gain/(loss) reclassified from Accumulated  other comprehensive (loss) income into earnings	(1)	0	(2)	1
Cash flow hedges | Interest and other, net
Pre-tax effect of derivative instruments in cash flow hedging relationships
Total amounts of income/(expense) line items in the statement of financial performance in which the effects of cash flow hedges are recorded	(160)	(39)	(341)	(71)
Gain/(loss) reclassified from Accumulated  other comprehensive (loss) income into earnings	3	(1)	6	(1)
Foreign currency contracts | Cash flow hedges
Pre-tax effect of derivative instruments in cash flow hedging relationships
Gain/(loss) recognized in Accumulated other comprehensive loss on derivative	(66)	553	(689)	833
Interest rate contracts | Cash flow hedges
Pre-tax effect of derivative instruments in cash flow hedging relationships
Gain/(loss) recognized in Accumulated other comprehensive loss on derivative	$ 0	$ 50	$ 0	$ 69