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INCOME TAXES Income tax contingencies (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Oct. 31, 2017
Oct. 31, 2019
Oct. 31, 2017
Income Tax Contingency [Line Items]      
Income taxes and penalties on gains related to IP rights $ 68   $ 68
Internal Revenue Service (IRS) [Member]      
Income Tax Contingency [Line Items]      
Open Tax Year Date   Nov. 01, 2015  
Foreign Tax Authority      
Income Tax Contingency [Line Items]      
Open Tax Year Date   Nov. 01, 2014  
Foreign entities [Member]      
Income Tax Contingency [Line Items]      
Open Tax Year   2008