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STOCKHOLDERS' EQUITY (Stock Repurchase Program) (Details) - USD ($)
$ in Millions
12 Months Ended
Oct. 31, 2019
Oct. 31, 2018
Oct. 31, 2017
May 29, 2019
Equity [Abstract]        
Stock Repurchase Program, Authorized Amount   $ 350   $ 500
Stock Repurchase Program, Remaining Authorized Repurchase Amount $ 160      
Treasury Stock, Shares, Acquired 2,093,570 2,075,460 0  
Treasury Stock, Value, Acquired, Cost Method $ (160) $ (120)