NET INCOME PER SHARE (Details) - USD ($) 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 income	$ 216	$ 101	$ 504	$ 298
Denominators:
Basic weighted-average shares	304	309	305	310
Potential common shares - stock options and other employee stock plans	3	3	3	3
Diluted weighted average shares	307	312	308	313
Anti-dilutive shares excluded from computation of dilutive earnings per share (in shares)	0	0	0	0