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, 2022	Apr. 30, 2021	Apr. 30, 2022	Apr. 30, 2021
Pre-tax effect of derivative instruments in cash flow hedging relationships
(Loss)/gain recognized in Accumulated other comprehensive loss on derivative	$ 603	$ (21)	$ 902	$ (387)
Total amounts of income/(expense) line items in the statement of financial performance in which the effects of cash flow hedges are recorded	1,278	1,362	2,637	2,683
Gain/(loss) reclassified from Accumulated  other comprehensive income (loss) into earnings	120	(149)	164	(198)
Cash flow hedges
Pre-tax effect of derivative instruments in cash flow hedging relationships
Gain/(loss) reclassified from Accumulated  other comprehensive income (loss) into earnings	120	(149)	164	(198)
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	16,490	15,877	33,518	31,523
Gain/(loss) reclassified from Accumulated  other comprehensive income (loss) into earnings	142	(146)	199	(189)
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	(13,157)	(12,437)	(26,800)	(24,759)
Gain/(loss) reclassified from Accumulated  other comprehensive income (loss) into earnings	(21)	(4)	(35)	(10)
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	(2,055)	(2,078)	(4,081)	(4,081)
Gain/(loss) reclassified from Accumulated  other comprehensive income (loss) into earnings	0	1	1	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	(39)	(26)	(71)	(51)
Gain/(loss) reclassified from Accumulated  other comprehensive income (loss) into earnings	(1)	0	(1)	0
Foreign currency contracts | Cash flow hedges
Pre-tax effect of derivative instruments in cash flow hedging relationships
(Loss)/gain recognized in Accumulated other comprehensive loss on derivative	553	(21)	833	(387)
Interest rate contracts | Cash flow hedges
Pre-tax effect of derivative instruments in cash flow hedging relationships
(Loss)/gain recognized in Accumulated other comprehensive loss on derivative	$ 50	$ 0	$ 69	$ 0