Net Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019
Numerator:
Net earnings	$ 734	$ 1,179	$ 2,176	$ 2,764
Denominator:
Weighted-average shares used to compute basic net EPS (shares)	1,417	1,499	1,435	1,528
Dilutive effect of employee stock plans (shares)	6	9	6	9
Weighted-average shares used to compute diluted net EPS (shares)	1,423	1,508	1,441	1,537
Net earnings per share:
Basic (usd per share)	$ 0.52	$ 0.79	$ 1.52	$ 1.81
Diluted (usd per share)	$ 0.52	$ 0.78	$ 1.51	$ 1.80
Anti-dilutive weighted average stock-based compensation awards (shares)	15	7	13	6