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Net Earnings (Loss) Per Share (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 12 Months Ended
Oct. 31, 2021
Oct. 31, 2020
Oct. 31, 2019
Numerator:      
Net earnings (loss) $ 3,427 $ (322) $ 1,049
Denominator:      
Weighted-average shares used to compute basic net EPS (in shares) 1,309 1,294 1,353
Dilutive effect of employee stock plans (in shares) 21 0 13
Weighted-average shares used to compute diluted net EPS (in shares) 1,330 1,294 1,366
Net earnings (loss) per share:      
Basic (in dollars per share) $ 2.62 $ (0.25) $ 0.78
Diluted (in dollars per share) $ 2.58 $ (0.25) $ 0.77
Anti-dilutive weighted average stock awards (in shares) 6 49 4