Financial Instruments (Details 4) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2013	Jul. 31, 2012
Effect of cash flow hedges on earnings
Portion of the hedging instruments gain or loss excluded from the assessment of effectiveness for fair value, cash flow or net investment hedges			$ 0
Effect of derivative instruments not designated as hedging instruments on earnings
Gain (Loss) recognized in earnings on derivatives not designated as hedges	290	181	248	332
Interest rate contracts \| Interest and other, net
Effect of fair value hedges on earnings
Gain (Loss) recognized in earnings before taxes on derivative, fair value hedges	(229)	(10)	(300)	(86)
Gain (Loss) recognized in earnings before taxes on related hedged item, fair value hedges	230	13	300	93
Effect of derivative instruments not designated as hedging instruments on earnings
Gain (Loss) recognized in earnings on derivatives not designated as hedges			3	11
Foreign exchange contracts \| Interest and other, net
Effect of derivative instruments not designated as hedging instruments on earnings
Gain (Loss) recognized in earnings on derivatives not designated as hedges	288	172	233	328
Other derivatives \| Interest and other, net
Effect of derivative instruments not designated as hedging instruments on earnings
Gain (Loss) recognized in earnings on derivatives not designated as hedges	2	9	12	(7)
Cash flow hedges
Effect of cash flow hedges on earnings
Gain (Loss) Recognized in Other Comprehensive Income ("OCI") on Derivative (Effective portion)	116	452	(44)	668
Gain (Loss) Reclassified from Accumulated OCI Into Earnings (Effective Portion)	21	279	(19)	366
Loss expected to be reclassified from Accumulated OCI into earnings in next 12 months			83
Cash flow hedges \| Foreign exchange contracts \| Net revenue
Effect of cash flow hedges on earnings
Gain (Loss) Recognized in Other Comprehensive Income ("OCI") on Derivative (Effective portion)	139	418	146	716
Gain (Loss) Reclassified from Accumulated OCI Into Earnings (Effective Portion)	88	283	77	369
Cash flow hedges \| Foreign exchange contracts \| Cost of products
Effect of cash flow hedges on earnings
Gain (Loss) Recognized in Other Comprehensive Income ("OCI") on Derivative (Effective portion)	(11)	22	(180)	(39)
Gain (Loss) Reclassified from Accumulated OCI Into Earnings (Effective Portion)	(77)	(23)	(107)	(5)
Cash flow hedges \| Foreign exchange contracts \| Other operating expenses
Effect of cash flow hedges on earnings
Gain (Loss) Recognized in Other Comprehensive Income ("OCI") on Derivative (Effective portion)	(28)	(5)	(17)	(9)
Gain (Loss) Reclassified from Accumulated OCI Into Earnings (Effective Portion)	1	(2)	6	(4)
Cash flow hedges \| Foreign exchange contracts \| Interest and other, net
Effect of cash flow hedges on earnings
Gain (Loss) Recognized in Other Comprehensive Income ("OCI") on Derivative (Effective portion)	16	17	7
Gain (Loss) Reclassified from Accumulated OCI Into Earnings (Effective Portion)	9	21	5	6
Net investment hedges \| Foreign exchange contracts \| Interest and other, net
Effect of cash flow hedges on earnings
Gain (Loss) Recognized in Other Comprehensive Income ("OCI") on Derivative (Effective portion)	$ 81	$ 33	$ 64	$ 71

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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The amount recognized in earnings related to the change in fair value during the period of the hedged item in a fair value hedge.

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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 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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Net gain (loss) from the increase (decrease) in fair value of derivative instrument not designated as hedging instrument.

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

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