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INCOME TAXES (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Jan. 31, 2019 | Jan. 31, 2018
Income Tax Disclosure |  |
Provision (benefit) for income taxes | $ (256) | $ 553
Effective income tax rate | (103.20%) | 237.30%
Discrete tax expense (benefit) | $ (299) |
Excess tax benefit from stock based compensation | $ (4) | $ (11)
U.S. Tax Cuts and Jobs Act of 2017 |  |
Income Tax Disclosure |  |
Discrete tax expense related to enactment of the Tax Act |  | $ 533

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