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INCOME TAXES (Details) - USD ($)
$ in Millions
3 Months Ended
Jan. 31, 2020
Jan. 31, 2019
Income Tax Disclosure [Abstract]    
Effective Income Tax Rate, Percent 19.10% 5.20%
Provision for income taxes $ 39 $ 6
Net Discrete Expense (Benefit) $ 3 $ (23)