Net Earnings Per Share (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended	6 Months Ended
Apr. 30, 2015	Apr. 30, 2014	Apr. 30, 2015	Apr. 30, 2014
Numerator:
Net earnings	$ 1,011	$ 1,273	$ 2,377	$ 2,698
Denominator:
Weighted-average shares used to compute basic net EPS	1,814,000,000	1,890,000,000	1,824,000,000	1,898,000,000
Dilutive effect of employee stock plans (in shares)	22,000,000	26,000,000	24,000,000	24,000,000
Weighted-average shares used to compute diluted net EPS	1,836,000,000	1,916,000,000	1,848,000,000	1,922,000,000
Net earnings per share:
Basic (in dollars per share)	$ 0.56us-gaap_EarningsPerShareBasic	$ 0.67us-gaap_EarningsPerShareBasic	$ 1.30us-gaap_EarningsPerShareBasic	$ 1.42us-gaap_EarningsPerShareBasic
Diluted (in dollars per share)	$ 0.55us-gaap_EarningsPerShareDiluted	$ 0.66us-gaap_EarningsPerShareDiluted	$ 1.29us-gaap_EarningsPerShareDiluted	$ 1.40us-gaap_EarningsPerShareDiluted
Other information related to EPS computation
Anti dilutive weighted-average options (in shares)	9,000,000	26,000,000	13,000,000	27,000,000
Restricted stock awards
Other information related to EPS computation
Awards outstanding	0		0

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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