NET INCOME PER SHARE (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2020	Apr. 30, 2019
Numerator:
Net income	$ 101	$ 182	$ 298	$ 686
Denominators:
Basic weighted-average shares (in shares)	309,000,000	317,000,000	310,000,000	318,000,000
Potential common shares - stock options and other employee stock plans (in shares)	3,000,000	4,000,000	3,000,000	4,000,000
Diluted weighted average shares (in shares)	312,000,000	321,000,000	313,000,000	322,000,000
Anti-dilutive shares excluded from computation of dilutive earnings per share (in shares)	0	0	0	0