Fair Value (Details) (USD $)	3 Months Ended	9 Months Ended
	Jul. 31, 2012	Jul. 31, 2012	Oct. 31, 2011
Fair Value and Carrying Value of Debt
Fair value, short- and long-term debt	$ 30,300,000,000	$ 30,300,000,000	$ 31,100,000,000
Carrying value, short- and long-term debt	29,700,000,000	29,700,000,000	30,600,000,000
Impairment of goodwill	7,961,000,000	7,961,000,000
Amortizable purchased intangible assets, Impairment Loss	1,227,000,000	1,227,000,000
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	8,594,000,000	8,594,000,000	6,842,000,000
Total Liabilities, measured at fair value on a recurring basis	491,000,000	491,000,000	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	2,993,000,000	2,993,000,000	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	3,632,000,000	3,632,000,000	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	396,000,000	396,000,000
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	38,000,000	38,000,000	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	359,000,000	359,000,000	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	51,000,000	51,000,000	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	395,000,000	395,000,000	593,000,000
Total Liabilities, measured at fair value on a recurring basis	37,000,000	37,000,000	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	706,000,000	706,000,000	304,000,000
Total Liabilities, measured at fair value on a recurring basis	453,000,000	453,000,000	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	24,000,000	24,000,000	31,000,000
Total Liabilities, measured at fair value on a recurring basis	1,000,000	1,000,000	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	3,677,000,000	3,677,000,000	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	3,632,000,000	3,632,000,000	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	35,000,000	35,000,000	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	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	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	4,849,000,000	4,849,000,000	6,387,000,000
Total Liabilities, measured at fair value on a recurring basis	478,000,000	478,000,000	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	2,993,000,000	2,993,000,000	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	396,000,000	396,000,000
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	3,000,000	3,000,000	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	352,000,000	352,000,000	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	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	395,000,000	395,000,000	593,000,000
Total Liabilities, measured at fair value on a recurring basis	37,000,000	37,000,000	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	706,000,000	706,000,000	269,000,000
Total Liabilities, measured at fair value on a recurring basis	440,000,000	440,000,000	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	2,000,000	25,000,000
Total Liabilities, measured at fair value on a recurring basis	1,000,000	1,000,000	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	68,000,000	68,000,000	89,000,000
Total Liabilities, measured at fair value on a recurring basis	13,000,000	13,000,000	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	46,000,000	46,000,000	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			35,000,000
Total Liabilities, measured at fair value on a recurring basis	13,000,000	13,000,000	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	$ 22,000,000	$ 22,000,000	$ 6,000,000