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SHARE-BASED COMPENSATION Allocated Share-based compensation expense (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Apr. 30, 2022
Apr. 30, 2021
Apr. 30, 2022
Apr. 30, 2021
Employee Service Share-based Compensation, Allocation of Recognized Period Costs        
Share-based compensation expense $ 27 $ 27 $ 72 $ 67
Cost of Products and Services        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs        
Share-based compensation expense 6 6 17 15
Research and Development        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs        
Share-based compensation expense 2 2 8 6
Selling, General and Administrative        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs        
Share-based compensation expense $ 19 $ 19 $ 47 $ 46