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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

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