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SHARE-BASED COMPENSATION Allocated Share-based compensation expense (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Apr. 30, 2019
Apr. 30, 2018
Apr. 30, 2019
Apr. 30, 2018
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Allocated Share-based Compensation Expense $ 23 $ 15 $ 50 $ 34
Share-based Compensation Capitalized within inventory     0 0
MTM adjustment for financial metrics based performance awards     4  
Cost of products and services        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Allocated Share-based Compensation Expense 5 4 9 7
Research and development        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Allocated Share-based Compensation Expense 3 2 9 6
Selling, general and administrative        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Allocated Share-based Compensation Expense $ 15 $ 9 $ 32 $ 21