INCOME TAXES (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2021	Apr. 30, 2020
Income Tax Disclosure
Provision (benefit) for income taxes	$ 57	$ 20	$ 81	$ 42
Effective income tax rate	20.90%	16.50%	13.80%	12.40%
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations			$ 16
Excess tax benefit from stock based compensation			$ (22)	$ (14)