Fair Value (Details) (USD $) In Millions	Jul. 31, 2011	Oct. 31, 2010
Fair Value Measured Using Level 1
Assets
Money market funds	$ 897	$ 971
Marketable equity securities	8	11
Foreign bonds	8	8
Corporate bonds and other debt securities	3	3
Total Assets, measured at fair value on a recurring basis	916	993
Fair Value Measured Using Level 2
Assets
Time deposits	8,307	6,598
Commercial paper	450
Marketable equity securities	3	3
Foreign bonds	385	365
Corporate bonds and other debt securities	2	6
Interest rate contracts - assets	581	735
Foreign exchange contracts - assets	90	150
Other derivatives - assets	2	5
Total Assets, measured at fair value on a recurring basis	9,820	7,862
Liabilities
Interest rate contracts - liabilities	67	89
Foreign exchange contracts - liabilities	1,013	880
Other derivatives - liabilities	9
Total Liabilities, measured at fair value on a recurring basis	1,089	969
Fair Value Measured Using Level 3
Assets
Corporate bonds and other debt securities	49	50
Foreign exchange contracts - assets	37	32
Other derivatives - assets	5	6
Total Assets, measured at fair value on a recurring basis	91	88
Liabilities
Foreign exchange contracts - liabilities	17	10
Total Liabilities, measured at fair value on a recurring basis	17	10
Total Balance, measured at fair value on a recurring basis
Assets
Time deposits	8,307	6,598
Commercial paper	450
Money market funds	897	971
Marketable equity securities	11	14
Foreign bonds	393	373
Corporate bonds and other debt securities	54	59
Interest rate contracts - assets	581	735
Foreign exchange contracts - assets	127	182
Other derivatives - assets	7	11
Total Assets, measured at fair value on a recurring basis	10,827	8,943
Liabilities
Interest rate contracts - liabilities	67	89
Foreign exchange contracts - liabilities	1,030	890
Other derivatives - liabilities	9
Total Liabilities, measured at fair value on a recurring basis	$ 1,106	$ 979