INCOME TAXES (Details) - USD ($) $ in Millions	3 Months Ended
Jan. 31, 2020	Jan. 31, 2019
Income Tax Disclosure
Provision (benefit) for income taxes	$ 22	$ (256)
Effective income tax rate	10.00%	(103.20%)
Discrete tax expense (benefit)		$ 299
Excess tax benefit from stock based compensation	$ 13	$ 4

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

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Amount of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to expense for award under share-based payment arrangement. Excludes expense determined to be nondeductible upon grant or after for award under share-based payment arrangement.

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

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Amount of other income tax expense (benefit).

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