Fair Value (Details) (USD $)	3 Months Ended
	Jan. 31, 2014	Oct. 31, 2013
Financial assets and liabilities measured at fair value on a recurring basis
Transfers between levels within the fair value hierarchy	$ 0
Fair Value and Carrying Value of Debt
Fair value, short- and long-term debt	24,800,000,000	22,700,000,000
Carrying value, short- and long-term debt	24,600,000,000	22,600,000,000
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	9,644,000,000	6,838,000,000
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	9,627,000,000	6,819,000,000
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	8,000,000	10,000,000
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	9,000,000	9,000,000
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	4,838,000,000	3,377,000,000
Total liabilities, measured at fair value on a recurring basis	567,000,000	654,000,000
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	3,385,000,000	2,221,000,000
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	359,000,000	313,000,000
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	7,000,000	5,000,000
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	385,000,000	387,000,000
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	141,000,000	156,000,000
Total liabilities, measured at fair value on a recurring basis	116,000,000	107,000,000
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	556,000,000	284,000,000
Total liabilities, measured at fair value on a recurring basis	447,000,000	547,000,000
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	3,000,000	9,000,000
Total liabilities, measured at fair value on a recurring basis	4,000,000
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	46,000,000	50,000,000
Total liabilities, measured at fair value on a recurring basis	5,000,000	2,000,000
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	46,000,000	47,000,000
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		3,000,000
Total liabilities, measured at fair value on a recurring basis	5,000,000	2,000,000
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	14,528,000,000	10,265,000,000
Total liabilities, measured at fair value on a recurring basis	572,000,000	656,000,000
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	3,385,000,000	2,221,000,000
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	9,627,000,000	6,819,000,000
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	359,000,000	313,000,000
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	15,000,000	15,000,000
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	394,000,000	396,000,000
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	48,000,000	49,000,000
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	141,000,000	156,000,000
Total liabilities, measured at fair value on a recurring basis	116,000,000	107,000,000
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	556,000,000	287,000,000
Total liabilities, measured at fair value on a recurring basis	452,000,000	549,000,000
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	3,000,000	9,000,000
Total liabilities, measured at fair value on a recurring basis	$ 4,000,000