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STOCKHOLDERS' EQUITY - Stock Repurchase Program (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Apr. 30, 2022
Apr. 30, 2021
Apr. 30, 2022
Apr. 30, 2021
Feb. 18, 2021
Nov. 19, 2018
2019 Repurchase Program [Member]            
Share repurchase program            
Share repurchase program authorized amount           $ 1,750
Shares repurchased and retired during period, (Shares)   164,422   3,050,000.00    
Shares repurchased and retired during period, (Value)   $ 21   $ 365    
Remaining authorized repurchase amount under share repurchase program         $ 193  
2021 Repurchase Program [Member]            
Share repurchase program            
Share repurchase program authorized amount         $ 2,000  
Shares repurchased and retired during period, (Shares) 1,751,000 1,388,000 4,658,000 1,388,000    
Shares repurchased and retired during period, (Value) $ 234 $ 174 $ 681 $ 174    
Remaining authorized repurchase amount under share repurchase program $ 896   $ 896