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Net Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2021	Apr. 30, 2020
Numerator:
Net earnings (loss)	$ 259	$ (821)	$ 482	$ (488)
Denominator:
Weighted-average shares used to compute basic net EPS (in shares)	1,309	1,291	1,304	1,295
Dilutive effect of employee stock plans (in shares)	22	0	19	0
Weighted-average shares used to compute diluted net EPS (in shares)	1,331	1,291	1,323	1,295
Net earnings (loss) per share:
Basic (in dollars per share)	$ 0.20	$ (0.64)	$ 0.37	$ (0.38)
Diluted (in dollars per share)	$ 0.19	$ (0.64)	$ 0.36	$ (0.38)
Anti-dilutive weighted-average stock awards (in shares)	1	48	7	48

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