Net Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2018	Jul. 31, 2017
Numerator:
Net earnings	$ 880	$ 696	$ 3,876	$ 1,866
Denominator:
Weighted-average shares used to compute basic net EPS (shares)	1,601	1,681	1,627	1,694
Dilutive effect of employee stock plans (shares)	17	14	18	11
Weighted-average shares used to compute diluted net EPS (shares)	1,618	1,695	1,645	1,705
Basic (usd per share)	$ 0.55	$ 0.41	$ 2.38	$ 1.10
Diluted (usd per share)	$ 0.54	$ 0.41	$ 2.36	$ 1.09
Anti-dilutive weighted average stock-based compensation awards (shares)	0	1	0	3