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Net Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Jan. 31, 2020	Jan. 31, 2019
Numerator:
Net earnings	$ 333	$ 177
Denominator:
Weighted-average shares used to compute basic net EPS (in shares)	1,300	1,401
Dilutive effect of employee stock plans (in shares)	15	11
Weighted-average shares used to compute diluted net EPS (in shares)	1,315	1,412
Net earnings per share:
Basic (in dollars per share)	$ 0.26	$ 0.13
Diluted (in dollars per share)	$ 0.25	$ 0.13
Anti-dilutive weighted-average stock awards (in shares)	1	7

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