Fair Value (Details) (USD $)	Jan. 31, 2013	Oct. 31, 2012
Fair Value and Carrying Value of Debt
Fair value, short- and long-term debt	$ 28,200,000,000	$ 28,400,000,000
Carrying value, short- and long-term debt	28,200,000,000	28,400,000,000
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	11,255,000,000	9,869,000,000
Total Liabilities, measured at fair value on a recurring basis	819,000,000	518,000,000
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	2,839,000,000	3,641,000,000
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	6,859,000,000	4,630,000,000
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	52,000,000	63,000,000
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	408,000,000	385,000,000
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	42,000,000	45,000,000
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	237,000,000	344,000,000
Total Liabilities, measured at fair value on a recurring basis	19,000,000	29,000,000
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	296,000,000	291,000,000
Total Liabilities, measured at fair value on a recurring basis	800,000,000	486,000,000
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	5,000,000	1,000,000
Total Liabilities, measured at fair value on a recurring basis		3,000,000
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	517,000,000	469,000,000
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	6,916,000,000	4,699,000,000
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	6,859,000,000	4,630,000,000
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	48,000,000	60,000,000
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	8,000,000	8,000,000
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	1,000,000	1,000,000
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	4,283,000,000	5,126,000,000
Total Liabilities, measured at fair value on a recurring basis	819,000,000	517,000,000
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	2,839,000,000	3,641,000,000
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	4,000,000	3,000,000
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	400,000,000	377,000,000
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
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	237,000,000	344,000,000
Total Liabilities, measured at fair value on a recurring basis	19,000,000	29,000,000
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	279,000,000	291,000,000
Total Liabilities, measured at fair value on a recurring basis	800,000,000	485,000,000
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	5,000,000	1,000,000
Total Liabilities, measured at fair value on a recurring basis		3,000,000
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	517,000,000	469,000,000
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	56,000,000	44,000,000
Total Liabilities, measured at fair value on a recurring basis		1,000,000
Fair Value, Measurements, Recurring | Fair Value Measured Using Level 3 | 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	39,000,000	44,000,000
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	17,000,000
Total Liabilities, measured at fair value on a recurring basis		$ 1,000,000