Fair Value (Details) (Fair Value, Measurements, Recurring, USD $) In Millions, unless otherwise specified	Jan. 31, 2012	Oct. 31, 2011
Estimate of Fair Value, Fair Value Disclosure
Financial assets and liabilities measured at fair value on a recurring basis
Total Assets, measured at fair value on a recurring basis	$ 6,915	$ 6,842
Total Liabilities, measured at fair value on a recurring basis	626	904
Estimate of Fair Value, Fair Value Disclosure | Time deposits
Financial assets and liabilities measured at fair value on a recurring basis
Total Assets, measured at fair value on a recurring basis	3,181	5,120
Estimate of Fair Value, Fair Value Disclosure | Money market funds
Financial assets and liabilities measured at fair value on a recurring basis
Total Assets, measured at fair value on a recurring basis	2,063	236
Estimate of Fair Value, Fair Value Disclosure | Marketable equity securities
Financial assets and liabilities measured at fair value on a recurring basis
Total Assets, measured at fair value on a recurring basis	57	122
Estimate of Fair Value, Fair Value Disclosure | Foreign bonds
Financial assets and liabilities measured at fair value on a recurring basis
Total Assets, measured at fair value on a recurring basis	370	383
Estimate of Fair Value, Fair Value Disclosure | Corporate bonds and other debt securities
Financial assets and liabilities measured at fair value on a recurring basis
Total Assets, measured at fair value on a recurring basis	53	53
Estimate of Fair Value, Fair Value Disclosure | Interest rate contracts
Financial assets and liabilities measured at fair value on a recurring basis
Total Assets, measured at fair value on a recurring basis	589	593
Total Liabilities, measured at fair value on a recurring basis	55	71
Estimate of Fair Value, Fair Value Disclosure | Foreign exchange contracts
Financial assets and liabilities measured at fair value on a recurring basis
Total Assets, measured at fair value on a recurring basis	582	304
Total Liabilities, measured at fair value on a recurring basis	571	832
Estimate of Fair Value, Fair Value Disclosure | Other derivatives
Financial assets and liabilities measured at fair value on a recurring basis
Total Assets, measured at fair value on a recurring basis	20	31
Total Liabilities, measured at fair value on a recurring basis		1
Fair Value Measured Using Level 1
Financial assets and liabilities measured at fair value on a recurring basis
Total Assets, measured at fair value on a recurring basis	2,128	366
Fair Value Measured Using Level 1 | Money market funds
Financial assets and liabilities measured at fair value on a recurring basis
Total Assets, measured at fair value on a recurring basis	2,063	236
Fair Value Measured Using Level 1 | Marketable equity securities
Financial assets and liabilities measured at fair value on a recurring basis
Total Assets, measured at fair value on a recurring basis	55	120
Fair Value Measured Using Level 1 | Foreign bonds
Financial assets and liabilities measured at fair value on a recurring basis
Total Assets, measured at fair value on a recurring basis	7	7
Fair Value Measured Using Level 1 | Corporate bonds and other debt securities
Financial assets and liabilities measured at fair value on a recurring basis
Total Assets, measured at fair value on a recurring basis	3	3
Fair Value Measured Using Level 2
Financial assets and liabilities measured at fair value on a recurring basis
Total Assets, measured at fair value on a recurring basis	4,715	6,387
Total Liabilities, measured at fair value on a recurring basis	618	895
Fair Value Measured Using Level 2 | Time deposits
Financial assets and liabilities measured at fair value on a recurring basis
Total Assets, measured at fair value on a recurring basis	3,181	5,120
Fair Value Measured Using Level 2 | Marketable equity securities
Financial assets and liabilities measured at fair value on a recurring basis
Total Assets, measured at fair value on a recurring basis	2	2
Fair Value Measured Using Level 2 | Foreign bonds
Financial assets and liabilities measured at fair value on a recurring basis
Total Assets, measured at fair value on a recurring basis	363	376
Fair Value Measured Using Level 2 | Corporate bonds and other debt securities
Financial assets and liabilities measured at fair value on a recurring basis
Total Assets, measured at fair value on a recurring basis	2	2
Fair Value Measured Using Level 2 | Interest rate contracts
Financial assets and liabilities measured at fair value on a recurring basis
Total Assets, measured at fair value on a recurring basis	589	593
Total Liabilities, measured at fair value on a recurring basis	55	71
Fair Value Measured Using Level 2 | Foreign exchange contracts
Financial assets and liabilities measured at fair value on a recurring basis
Total Assets, measured at fair value on a recurring basis	566	269
Total Liabilities, measured at fair value on a recurring basis	563	823
Fair Value Measured Using Level 2 | Other derivatives
Financial assets and liabilities measured at fair value on a recurring basis
Total Assets, measured at fair value on a recurring basis	12	25
Total Liabilities, measured at fair value on a recurring basis		1
Fair Value Measured Using Level 3
Financial assets and liabilities measured at fair value on a recurring basis
Total Assets, measured at fair value on a recurring basis	72	89
Total Liabilities, measured at fair value on a recurring basis	8	9
Fair Value Measured Using Level 3 | Corporate bonds and other debt securities
Financial assets and liabilities measured at fair value on a recurring basis
Total Assets, measured at fair value on a recurring basis	48	48
Fair Value Measured Using Level 3 | Foreign exchange contracts
Financial assets and liabilities measured at fair value on a recurring basis
Total Assets, measured at fair value on a recurring basis	16	35
Total Liabilities, measured at fair value on a recurring basis	8	9
Fair Value Measured Using Level 3 | Other derivatives
Financial assets and liabilities measured at fair value on a recurring basis
Total Assets, measured at fair value on a recurring basis	$ 8	$ 6