Fair Value (Details) (USD $)	Apr. 30, 2012	Oct. 31, 2011
Fair Value and Carrying Value of Debt
Fair value, short- and long-term debt	$ 30,600,000,000	$ 31,100,000,000
Carrying value, short- and long-term debt	30,100,000,000	30,600,000,000
Fair Value, Measurements, Recurring | 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	6,499,000,000	6,842,000,000
Total Liabilities, measured at fair value on a recurring basis	521,000,000	904,000,000
Fair Value, Measurements, Recurring | 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	2,796,000,000	5,120,000,000
Fair Value, Measurements, Recurring | 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	1,985,000,000	236,000,000
Fair Value, Measurements, Recurring | Estimate of Fair Value, Fair Value Disclosure | Mutual funds
Financial assets and liabilities measured at fair value on a recurring basis
Total Assets, measured at fair value on a recurring basis	380,000,000
Fair Value, Measurements, Recurring | 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	50,000,000	122,000,000
Fair Value, Measurements, Recurring | 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	372,000,000	383,000,000
Fair Value, Measurements, Recurring | 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	53,000,000	53,000,000
Fair Value, Measurements, Recurring | 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	411,000,000	593,000,000
Total Liabilities, measured at fair value on a recurring basis	44,000,000	71,000,000
Fair Value, Measurements, Recurring | 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	438,000,000	304,000,000
Total Liabilities, measured at fair value on a recurring basis	477,000,000	832,000,000
Fair Value, Measurements, Recurring | 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	14,000,000	31,000,000
Total Liabilities, measured at fair value on a recurring basis		1,000,000
Fair Value, Measurements, Recurring | 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	2,040,000,000	366,000,000
Fair Value, Measurements, Recurring | 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	1,985,000,000	236,000,000
Fair Value, Measurements, Recurring | 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	45,000,000	120,000,000
Fair Value, Measurements, Recurring | 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	7,000,000	7,000,000
Fair Value, Measurements, Recurring | 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	3,000,000	3,000,000
Fair Value, Measurements, Recurring | 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	4,398,000,000	6,387,000,000
Total Liabilities, measured at fair value on a recurring basis	512,000,000	895,000,000
Fair Value, Measurements, Recurring | 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	2,796,000,000	5,120,000,000
Fair Value, Measurements, Recurring | Fair Value Measured Using Level 2 | Mutual funds
Financial assets and liabilities measured at fair value on a recurring basis
Total Assets, measured at fair value on a recurring basis	380,000,000
Fair Value, Measurements, Recurring | 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	5,000,000	2,000,000
Fair Value, Measurements, Recurring | 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	365,000,000	376,000,000
Fair Value, Measurements, Recurring | 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	2,000,000	2,000,000
Fair Value, Measurements, Recurring | 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	411,000,000	593,000,000
Total Liabilities, measured at fair value on a recurring basis	44,000,000	71,000,000
Fair Value, Measurements, Recurring | 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	437,000,000	269,000,000
Total Liabilities, measured at fair value on a recurring basis	468,000,000	823,000,000
Fair Value, Measurements, Recurring | 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	2,000,000	25,000,000
Total Liabilities, measured at fair value on a recurring basis		1,000,000
Fair Value, Measurements, Recurring | 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	61,000,000	89,000,000
Total Liabilities, measured at fair value on a recurring basis	9,000,000	9,000,000
Fair Value, Measurements, Recurring | 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	48,000,000	48,000,000
Fair Value, Measurements, Recurring | 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	1,000,000	35,000,000
Total Liabilities, measured at fair value on a recurring basis	9,000,000	9,000,000
Fair Value, Measurements, Recurring | 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	$ 12,000,000	$ 6,000,000