Net Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2019	Jul. 31, 2018	Jul. 31, 2019	Jul. 31, 2018
Numerator:
Net earnings	$ 1,179	$ 880	$ 2,764	$ 3,876
Denominator:
Weighted-average shares used to compute basic net EPS (shares)	1,499	1,601	1,528	1,627
Dilutive effect of employee stock plans (shares)	9	17	9	18
Weighted-average shares used to compute diluted net EPS (shares)	1,508	1,618	1,537	1,645
Net earnings per share:
Basic (usd per share)	$ 0.79	$ 0.55	$ 1.81	$ 2.38
Diluted (usd per share)	$ 0.78	$ 0.54	$ 1.80	$ 2.36
Anti-dilutive weighted average stock-based compensation awards (shares)	7	0	6	0