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SUPPLEMENT CASH FLOW INFORMATION (Details) - USD ($)
$ in Millions
 6 Months Ended
Apr. 30, 2019
Apr. 30, 2018
Other Significant Noncash Transactions [Line Items]    
Increase (decrease) in capital expenditure incurred but not yet paid $ 7 $ (9)
Unsettled treasury repurchase trade (1) (12)
Accounts Payable [Member]    
Other Significant Noncash Transactions [Line Items]    
Increase (decrease) in capital expenditure incurred but not yet paid 7 (9)
Other Accrued Liabilities [Member]    
Other Significant Noncash Transactions [Line Items]    
Unsettled treasury repurchase trade $ (1) $ (12)