Financial Instruments - Pre-tax Effect (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2016	Jul. 31, 2015
Pre-tax effect of derivative instruments in cash flow and net investment hedging relationships
Net revenue	$ 12,210	$ 13,057	$ 37,645	$ 38,659
Cost of products	(9,713)	(12,813)	(34,272)	(37,255)
Interest and other, net	(18)	4	(212)	(42)
Earnings before taxes	2,407	248	3,089	1,360
Portion of the hedging instruments gain or loss excluded from the assessment of effectiveness for fair value, cash flow or net investment hedges	0	0	0	0
Pre-tax effect of derivative instruments not designated as hedging instruments on the Condensed Consolidated and Combined Statements of Earnings
Gains (Losses) Recognized in Earnings on Derivatives	(83)	(32)	(407)	39
Change in net unrealized gains (losses) on cash flow hedges: \| Reclassifications of gains (losses) into earnings
Pre-tax effect of derivative instruments in cash flow and net investment hedging relationships
Net revenue	(43)	17	24	219
Cost of products	0	2	(1)	5
Other operating expenses	0	1	0	(4)
Interest and other, net	62	51	187	150
Earnings before taxes	19	71	210	370
Interest rate contracts
Pre-tax effect of derivative instruments and related hedged items in a fair value hedging relationship
Gains (Losses) Recognized in Earnings on Derivative	127	0	294	0
Gains (Losses) Recognized in Earnings on Related Hedged Item	(127)	0	(294)	0
Foreign currency contracts \| Interest and other, net
Pre-tax effect of derivative instruments not designated as hedging instruments on the Condensed Consolidated and Combined Statements of Earnings
Gains (Losses) Recognized in Earnings on Derivatives	(85)	(32)	(409)	41
Other derivatives \| Interest and other, net
Pre-tax effect of derivative instruments not designated as hedging instruments on the Condensed Consolidated and Combined Statements of Earnings
Gains (Losses) Recognized in Earnings on Derivatives	2	0	2	(2)
Cash flow hedges:
Pre-tax effect of derivative instruments in cash flow and net investment hedging relationships
Gains (Losses) Recognized in Other Comprehensive Income (OCI) on Derivatives (Effective Portion)	172	183	108	415
Loss expected to be reclassified from Accumulated OCI into earnings in next 12 months			4
Cash flow hedges: \| Foreign currency contracts \| Net revenue
Pre-tax effect of derivative instruments in cash flow and net investment hedging relationships
Gains (Losses) Recognized in Other Comprehensive Income (OCI) on Derivatives (Effective Portion)	114	121	(72)	258
Cash flow hedges: \| Foreign currency contracts \| Cost of products
Pre-tax effect of derivative instruments in cash flow and net investment hedging relationships
Gains (Losses) Recognized in Other Comprehensive Income (OCI) on Derivatives (Effective Portion)	2	3	3	(2)
Cash flow hedges: \| Foreign currency contracts \| Other operating expenses
Pre-tax effect of derivative instruments in cash flow and net investment hedging relationships
Gains (Losses) Recognized in Other Comprehensive Income (OCI) on Derivatives (Effective Portion)	(2)	2	0	0
Cash flow hedges: \| Foreign currency contracts \| Interest and other, net
Pre-tax effect of derivative instruments in cash flow and net investment hedging relationships
Gains (Losses) Recognized in Other Comprehensive Income (OCI) on Derivatives (Effective Portion)	58	57	177	159
Net investment hedges: \| Foreign currency contracts
Pre-tax effect of derivative instruments in cash flow and net investment hedging relationships
Gains (Losses) Recognized in Other Comprehensive Income (OCI) on Derivatives (Effective Portion)	$ 12	$ 85	$ (68)	$ 208

The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

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Amount of the increase (decrease) in fair value of the hedged item in a fair value hedge recognized in the income statement.

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Total costs of sales and operating expenses for the period.

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The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period.

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Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments.

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The net gain (loss) relating to components of the gain (loss) on the cash flow hedging instrument excluded from the assessment of cash flow hedge effectiveness. Recognized in earnings.

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Total amount of gain (loss) derived from fair value hedges recognized in earnings in the period.

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The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business).

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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