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STOCKHOLDERS' EQUITY (Stock Repurchase Program) (Details) - USD ($)
$ in Millions
12 Months Ended
Oct. 31, 2020
Oct. 31, 2019
Oct. 31, 2018
May 29, 2019
Equity [Abstract]        
Stock Repurchase Program, Authorized Amount     $ 350 $ 500
Treasury Stock, Shares, Acquired 4,274,366 2,093,570 2,075,460  
Treasury Stock, Value, Acquired, Cost Method $ (410) $ (160) $ (120)