Financial Instruments (Details 4) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Apr. 30, 2013	Apr. 30, 2012	Apr. 30, 2013	Apr. 30, 2012
Effect of derivative instruments not designated as hedging instruments on earnings
Gain (Loss) recognized in earnings on derivatives not designated as hedges	$ (11)	$ 69	$ (42)	$ 151
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	28	(80)	(71)	(76)
Gain (Loss) recognized in earnings before taxes on related hedged item, fair value hedges	(28)	80	70	80
Effect of derivative instruments not designated as hedging instruments on earnings
Gain (Loss) recognized in earnings on derivatives not designated as hedges	1	1	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	(15)	74	(55)	156
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	3	(6)	10	(16)
Cash flow hedges
Effect of cash flow hedges on earnings
Gain (Loss) Recognized in Other Comprehensive Income ("OCI") on Derivative (Effective portion)	154	(191)	(160)	216
Gain (Loss) Reclassified from Accumulated OCI Into Earnings (Effective Portion)	24	(11)	(40)	87
Loss expected to be reclassified from Accumulated OCI into earnings in next 12 months			158
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)	206	(120)	7	298
Gain (Loss) Reclassified from Accumulated OCI Into Earnings (Effective Portion)	46	3	(11)	86
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)	(44)	(53)	(169)	(61)
Gain (Loss) Reclassified from Accumulated OCI Into Earnings (Effective Portion)	(27)	2	(30)	18
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)	3	(1)	11	(4)
Gain (Loss) Reclassified from Accumulated OCI Into Earnings (Effective Portion)	4	(1)	5	(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)	(11)	(17)	(9)	(17)
Gain (Loss) Reclassified from Accumulated OCI Into Earnings (Effective Portion)	1	(15)	(4)	(15)
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)	$ (2)	$ 13	$ (17)	$ 38