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Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Numerator:
Net earnings from continuing operations	$ 5,327	$ 2,526	$ 2,666
Net loss from discontinued operations	0	0	(170)
Net earnings	$ 5,327	$ 2,526	$ 2,496
Denominator:
Weighted-average shares used to compute basic net EPS (in shares)	1,615	1,688	1,730
Dilutive effect of employee stock plans (in shares)	19	14	13
Weighted-average shares used to compute diluted net EPS (in shares)	1,634	1,702	1,743
Basic net earnings per share:
Continuing operations (in dollars per share)	$ 3.30	$ 1.50	$ 1.54
Discontinued operations (in dollars per share)	0.00	0.00	(0.10)
Total basic net earnings per share (in dollars per share)	3.30	1.50	1.44
Diluted net earnings per share:
Continuing operations (in dollars per share)	3.26	1.48	1.53
Discontinued operations (in dollars per share)	0.00	0.00	(0.10)
Total diluted net earnings per share (in dollars per share)	$ 3.26	$ 1.48	$ 1.43
Anti dilutive weighted-average options (in shares)	0	1	13

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