Fair Value (Details) (USD $)	3 Months Ended	9 Months Ended
	Jul. 31, 2013	Jul. 31, 2013	Oct. 31, 2012
Financial assets and liabilities measured at fair value on a recurring basis
Transfers between the levels within the fair value hierarchy	$ 0	$ 0
Fair Value and Carrying Value of Debt
Fair value, short- and long-term debt	24,800,000,000	24,800,000,000	28,400,000,000
Carrying value, short- and long-term debt	24,700,000,000	24,700,000,000	28,400,000,000
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	7,833,000,000	7,833,000,000	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	7,818,000,000	7,818,000,000	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	7,000,000	7,000,000	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	8,000,000
Fair Value, Measurements, Recurring | Fair Value Measured Using Level 1 | 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
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	4,075,000,000	4,075,000,000	5,126,000,000
Total Liabilities, measured at fair value on a recurring basis	565,000,000	565,000,000	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	2,618,000,000	2,618,000,000	3,641,000,000
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	382,000,000	382,000,000	469,000,000
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	6,000,000	6,000,000	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	372,000,000	372,000,000	377,000,000
Fair Value, Measurements, Recurring | Fair Value Measured Using Level 2 | 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	162,000,000	162,000,000	344,000,000
Total Liabilities, measured at fair value on a recurring basis	144,000,000	144,000,000	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	523,000,000	523,000,000	291,000,000
Total Liabilities, measured at fair value on a recurring basis	421,000,000	421,000,000	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	10,000,000	10,000,000	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 3
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	39,000,000	44,000,000
Total Liabilities, measured at fair value on a recurring basis	2,000,000	2,000,000	1,000,000
Fair Value, Measurements, Recurring | Fair Value Measured Using Level 3 | 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	37,000,000	37,000,000	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	2,000,000	2,000,000
Total Liabilities, measured at fair value on a recurring basis	2,000,000	2,000,000	1,000,000
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	11,947,000,000	11,947,000,000	9,869,000,000
Total Liabilities, measured at fair value on a recurring basis	567,000,000	567,000,000	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	2,618,000,000	2,618,000,000	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	7,818,000,000	7,818,000,000	4,630,000,000
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	382,000,000	382,000,000	469,000,000
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	13,000,000	13,000,000	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	380,000,000	380,000,000	385,000,000
Fair Value, Measurements, Recurring | Estimate of Fair Value, Fair Value Disclosure | 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	39,000,000	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	162,000,000	162,000,000	344,000,000
Total Liabilities, measured at fair value on a recurring basis	144,000,000	144,000,000	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	525,000,000	525,000,000	291,000,000
Total Liabilities, measured at fair value on a recurring basis	423,000,000	423,000,000	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	10,000,000	10,000,000	1,000,000
Total Liabilities, measured at fair value on a recurring basis			$ 3,000,000