NET INCOME PER SHARE (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019
Numerator:
Net income	$ 199	$ 191	$ 497	$ 877
Denominators:
Basic weighted-average shares (in shares)	309	312	309	316
Potential common shares - stock options and other employee stock plans (in shares)	3	4	3	4
Diluted weighted average shares (in shares)	312	316	312	320
Anti-dilutive shares excluded from computation of dilutive earnings per share (in shares)	0	0	0	0