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INCOME TAXES (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019
Income Tax Disclosure
Provision (benefit) for income taxes	$ 20	$ 31	$ 62	$ (189)
Effective income tax rate	9.10%	14.00%	11.10%	(27.50%)
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations	$ 16		$ 16
Discrete tax expense (benefit)				$ 299
Excess tax benefit from stock based compensation	$ 15

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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