Net Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2016	Jul. 31, 2015
Numerator:
Net earnings from continuing operations	$ 843	$ 700	$ 2,153	$ 2,203
Net (loss) earnings from discontinued operations	(60)	154	(149)	1,028
Net earnings	$ 783	$ 854	$ 2,004	$ 3,231
Denominator:
Weighted-average shares used to compute basic net EPS (shares)	1,711	1,805	1,735	1,817
Dilutive effect of employee stock plans (shares)	14	23	12	25
Weighted-average shares used to compute diluted net EPS (shares)	1,725	1,828	1,747	1,842
Basic net earnings (loss) per share:
Continuing operations (usd per share)	$ 0.49	$ 0.39	$ 1.24	$ 1.21
Discontinued operations (usd per share)	(0.03)	0.08	(0.08)	0.57
Total basic net earnings per share (usd per share)	0.46	0.47	1.16	1.78
Diluted net earnings (loss) per share:
Continuing operations (usd per share)	0.49	0.39	1.23	1.20
Discontinued operations (usd per share)	(0.04)	0.08	(0.08)	0.55
Total diluted net earnings per share (usd per share)	$ 0.45	$ 0.47	$ 1.15	$ 1.75
Anti-dilutive weighted average stock-based compensation awards (shares)	13	10	26	12