Net Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Jan. 31, 2018	Jan. 31, 2017
Numerator:
Net earnings from continuing operations	$ 1,482	$ 251
Net (loss) earnings from discontinued operations	(46)	16
Net earnings	$ 1,436	$ 267
Denominator:
Weighted-average shares used to compute basic net EPS (in shares)	1,591	1,669
Dilutive effect of employee stock plans (in shares)	28	31
Weighted-average shares used to compute diluted net EPS (in shares)	1,619	1,700
Basic net earnings (loss) per share:
Continuing operations (in dollars per share)	$ 0.93	$ 0.15
Discontinued operations (in dollars per share)	(0.03)	0.01
Total basic net earnings (loss) per share (in dollars per share)	0.90	0.16
Diluted net earnings (loss) per share:
Diluted - Continuing operations (in dollars per share)	0.92	0.15
Diluted - Discontinued operations (in dollars per share)	(0.03)	0.01
Total diluted net earnings (loss) per share (in dollars per share)	$ 0.89	$ 0.16
Anti-dilutive weighted-average stock awards (in shares)	7	7