Net Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2017	Jul. 31, 2016
Numerator:
Net earnings from continuing operations	$ 696	$ 843	$ 1,866	$ 2,153
Net loss from discontinued operations	0	(60)	0	(149)
Net earnings	$ 696	$ 783	$ 1,866	$ 2,004
Denominator:
Weighted-average shares used to compute basic net EPS (shares)	1,681	1,711	1,694	1,735
Dilutive effect of employee stock plans (shares)	14	14	11	12
Weighted-average shares used to compute diluted net EPS (shares)	1,695	1,725	1,705	1,747
Basic net earnings (loss) per share:
Continuing operations (usd per share)	$ 0.41	$ 0.49	$ 1.10	$ 1.24
Discontinued operations (usd per share)	0.00	(0.03)	0.00	(0.08)
Total basic net earnings per share (usd per share)	0.41	0.46	1.10	1.16
Diluted net earnings (loss) per share:
Continuing operations (usd per share)	0.41	0.49	1.09	1.23
Discontinued operations (usd per share)	0.00	(0.04)	0.00	(0.08)
Total diluted net earnings per share (usd per share)	$ 0.41	$ 0.45	$ 1.09	$ 1.15
Anti-dilutive weighted average stock-based compensation awards (shares)	1	13	3	26