Financial Instruments (Details 4) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Jan. 31, 2013	Jan. 31, 2012
Effect of derivative instruments not designated as hedging instruments on earnings
Gain (Loss) recognized in income on derivatives not designated as hedges	$ (31)	$ 82
Interest rate contracts | Interest and other, net
Effect of fair value hedges on earnings
Gain (Loss) recognized in income on derivative, fair value hedges	(99)	4
Gain (Loss) recognized in income on related hedged item, fair value hedges	98
Effect of derivative instruments not designated as hedging instruments on earnings
Gain (Loss) recognized in income on derivatives not designated as hedges	2	10
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	(40)	82
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	7	(10)
Cash flow hedges
Effect of cash flow hedges on earnings
Gain (Loss) recognized in Other Comprehensive Income ("OCI") on derivative (effective portion)	(314)	407
Gain (Loss) Reclassified from Accumulated OCI Into Income (Effective Portion)	(64)	98
Loss expected to be reclassified from Accumulated OCI into earnings in next 12 months	254
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)	(213)	427
Gain (Loss) Reclassified from Accumulated OCI Into Income (Effective Portion)	(61)	88
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)	(125)	(8)
Gain (Loss) Reclassified from Accumulated OCI Into Income (Effective Portion)	(3)	16
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)	8	(3)
Gain (Loss) Reclassified from Accumulated OCI Into Income (Effective Portion)	1	(1)
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)	2
Gain (Loss) Reclassified from Accumulated OCI Into Income (Effective Portion)	(5)
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)	14	(9)
Gain (Loss) Reclassified from Accumulated OCI Into Income (Effective Portion)	4	(5)
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)	$ (15)	$ 25