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INCOME TAXES (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jul. 31, 2021 | Jul. 31, 2020 | Jul. 31, 2021 | Jul. 31, 2020
Income Tax Disclosure |  |  |  |
Provision (benefit) for income taxes | $ 63 | $ 20 | $ 144 | $ 62
Effective income tax rate | 19.30% | 9.10% | 15.80% | 11.10%
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations | $ 8 | $ 16 | $ 24 | $ 16
Excess tax benefit from stock based compensation |  |  | $ (24) | $ (15)

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