The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

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The net result for the period of deducting operating expenses from operating revenues.

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Financial Instruments - Schedule of Pre-Tax Effect of Derivative Instruments in Cash Flow Hedging Relationships (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019
Pre-tax effect of derivative instruments in cash flow hedging relationships
Gain/(Loss) Recognized in AOCI on Derivatives	$ (563)		$ (272)
Total amounts of income and expense line items presented in the statement of financial performance in which the effects of cash flow hedges are recorded	779	$ 1,079	2,470	$ 2,933
Gain /(Loss) Reclassified from AOCI into Earnings	130		242
Gain/(Loss) Recognized in AOCI on Derivatives		180		271
Cash flow hedges
Pre-tax effect of derivative instruments in cash flow hedging relationships
Gain/(Loss) Recognized in AOCI on Derivatives			(272)
Gain /(Loss) Reclassified from AOCI into Earnings			242
Gain/(Loss) Recognized in AOCI on Derivatives		180		271
Gain /(Loss) Reclassified from AOCI into Earnings		86		259
Foreign currency contracts
Pre-tax effect of derivative instruments in cash flow hedging relationships
Gain/(Loss) Recognized in AOCI on Derivatives	(567)
Foreign currency contracts \| Net revenue
Pre-tax effect of derivative instruments in cash flow hedging relationships
Gain /(Loss) Reclassified from AOCI into Earnings	136
Foreign currency contracts \| Cash flow hedges
Pre-tax effect of derivative instruments in cash flow hedging relationships
Gain/(Loss) Recognized in AOCI on Derivatives			(268)
Gain/(Loss) Recognized in AOCI on Derivatives		180		271
Foreign currency contracts \| Cash flow hedges \| Net revenue
Pre-tax effect of derivative instruments in cash flow hedging relationships
Total amounts of income and expense line items presented in the statement of financial performance in which the effects of cash flow hedges are recorded	14,294	14,603	41,381	43,349
Gain /(Loss) Reclassified from AOCI into Earnings			259
Gain /(Loss) Reclassified from AOCI into Earnings		98		289
Foreign currency contracts \| Cash flow hedges \| Cost of revenue
Pre-tax effect of derivative instruments in cash flow hedging relationships
Total amounts of income and expense line items presented in the statement of financial performance in which the effects of cash flow hedges are recorded		(11,698)		(35,103)
Gain /(Loss) Reclassified from AOCI into Earnings		(12)		(28)
Foreign currency contracts \| Cash flow hedges \| Operating expenses
Pre-tax effect of derivative instruments in cash flow hedging relationships
Total amounts of income and expense line items presented in the statement of financial performance in which the effects of cash flow hedges are recorded		(1,826)		(5,313)
Gain /(Loss) Reclassified from AOCI into Earnings		$ 0		$ (2)
Interest rate contracts
Pre-tax effect of derivative instruments in cash flow hedging relationships
Gain/(Loss) Recognized in AOCI on Derivatives	4
Interest rate contracts \| Cost of revenue
Pre-tax effect of derivative instruments in cash flow hedging relationships
Gain /(Loss) Reclassified from AOCI into Earnings	(7)
Interest rate contracts \| Operating expenses
Pre-tax effect of derivative instruments in cash flow hedging relationships
Gain /(Loss) Reclassified from AOCI into Earnings	1
Interest rate contracts \| Cash flow hedges
Pre-tax effect of derivative instruments in cash flow hedging relationships
Gain/(Loss) Recognized in AOCI on Derivatives			(4)
Interest rate contracts \| Cash flow hedges \| Cost of revenue
Pre-tax effect of derivative instruments in cash flow hedging relationships
Total amounts of income and expense line items presented in the statement of financial performance in which the effects of cash flow hedges are recorded	(11,901)		(33,623)
Gain /(Loss) Reclassified from AOCI into Earnings			(18)
Interest rate contracts \| Cash flow hedges \| Operating expenses
Pre-tax effect of derivative instruments in cash flow hedging relationships
Total amounts of income and expense line items presented in the statement of financial performance in which the effects of cash flow hedges are recorded	$ (1,614)		(5,288)
Gain /(Loss) Reclassified from AOCI into Earnings			$ 1