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GOODWILL AND OTHER INTANGIBLE ASSETS (Intangible assets narratives) (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Jul. 31, 2020
Jul. 31, 2019
Jul. 31, 2020
Jul. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]        
Finite Lived Intangible Assets, Foreign Currency Translation Gain (Loss)     $ 3  
Amortization of Intangible Assets $ 54 $ 53 $ 162 $ 155