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INCOME TAXES (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Jul. 31, 2020
Jul. 31, 2019
Jul. 31, 2020
Jul. 31, 2019
Income Tax Disclosure [Abstract]        
Effective Income Tax Rate, Percent 4.70% 20.10% 17.20% 16.90%
Provision for income taxes $ 9 $ 40 $ 85 $ 86
Net Discrete Expense (Benefit) $ (10) $ 3 $ (5) $ 32