Financial Instruments (Details 4) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
Apr. 30, 2012	Apr. 30, 2011	Apr. 30, 2012	Apr. 30, 2011
Effect of derivative instruments not designated as hedging instruments on earnings
Gain (Loss) recognized in income on derivatives not designated as hedges	$ (79)	$ (608)	$ (161)	$ (685)
Interest rate contracts \| Interest and other, net
Effect of fair value hedges on earnings
Gain (Loss) recognized in income on derivative, fair value hedges	(80)	(25)	(76)	(203)
Gain (Loss) recognized in income on related hedged item, fair value hedges	80	27	80	201
Effect of derivative instruments not designated as hedging instruments on earnings
Gain (Loss) recognized in income on derivatives not designated as hedges	1	1	11	3
Foreign exchange contracts \| Interest and other, net
Effect of derivative instruments not designated as hedging instruments on earnings
Gain (Loss) recognized in income on derivatives not designated as hedges	(74)	(621)	(156)	(698)
Other derivatives \| Interest and other, net
Effect of derivative instruments not designated as hedging instruments on earnings
Gain (Loss) recognized in income on derivatives not designated as hedges	(6)	12	(16)	10
Cash flow hedges
Effect of cash flow hedges on earnings
Gain (Loss) recognized in Other Comprehensive Income ("OCI") on derivative (effective portion)	(191)	(771)	216	(679)
Gain (Loss) Reclassified from Accumulated OCI Into Income (Effective Portion)	(11)	(336)	87	(322)
Gain recognized in income on derivative (ineffective portion and amount excluded from effectiveness testing)		1		3
Gain expected to be reclassified from Accumulated OCI into earnings in next 12 months			47
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)	(110)	(780)	317	(680)
Gain (Loss) Reclassified from Accumulated OCI Into Income (Effective Portion)	(2)	(296)	86	(320)
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)	(53)	27	(61)	18
Gain (Loss) Reclassified from Accumulated OCI Into Income (Effective Portion)	2	(4)	18	22
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)	(1)	7	(4)	5
Gain (Loss) Reclassified from Accumulated OCI Into Income (Effective Portion)	(1)	1	(2)	2
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)	(17)	(36)	(17)	(20)
Gain (Loss) Reclassified from Accumulated OCI Into Income (Effective Portion)	(15)	(39)	(15)	(32)
Cash flow hedges \| Foreign exchange contracts - joint venture \| Net revenue
Effect of cash flow hedges on earnings
Gain (Loss) recognized in Other Comprehensive Income ("OCI") on derivative (effective portion)	(10)	11	(19)	(2)
Gain (Loss) Reclassified from Accumulated OCI Into Income (Effective Portion)	5	2		6
Cash flow hedges \| Foreign exchange contracts - joint venture \| Interest and other, net
Effect of cash flow hedges on earnings
Gain recognized in income on derivative (ineffective portion and amount excluded from effectiveness testing)		1		3
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)	$ 13	$ (92)	$ 38	$ (97)

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 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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Amount of unrealized gain (loss) included in earnings for the period related to the fair value of the hedged item in an interest rate fair value hedge, which was offset by the gain (loss) on the hedging instrument to the extent that the fair value hedge is determined to be effective.

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Amount of unrealized gain (loss) related to the fair value of interest rate derivatives designated as fair value hedging instruments. Recognized in earnings and offsets the gain (loss) on the hedged item to the extent that the fair value hedge is determined to be effective.

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