Net Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2017	Apr. 30, 2016
Numerator:
Net earnings from continuing operations	$ 559	$ 660	$ 1,170	$ 1,310
Net loss from discontinued operations	0	(31)	0	(89)
Net earnings	$ 559	$ 629	$ 1,170	$ 1,221
Denominator:
Weighted-average shares used to compute basic net EPS (shares)	1,688	1,720	1,696	1,748
Dilutive effect of employee stock plans (shares)	21	11	20	10
Weighted-average shares used to compute diluted net EPS (shares)	1,709	1,731	1,716	1,758
Basic net earnings (loss) per share:
Continuing operations (usd per share)	$ 0.33	$ 0.38	$ 0.69	$ 0.75
Discontinued operations (usd per share)	0.00	(0.01)	0.00	(0.05)
Total basic net earnings per share (usd per share)	0.33	0.37	0.69	0.70
Diluted net earnings (loss) per share:
Continuing operations (usd per share)	0.33	0.38	0.68	0.75
Discontinued operations (usd per share)	0.00	(0.02)	0.00	(0.06)
Total diluted net earnings per share (usd per share)	$ 0.33	$ 0.36	$ 0.68	$ 0.69
Anti-dilutive weighted average stock-based compensation awards (shares)	3	27	4	25