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NEW ACCOUNTING PRONOUNCEMENTS Effect of ASU 2016-15 adoption- adjustments in Cash Flow (details) (Details) - USD ($)
$ in Millions
12 Months Ended
Oct. 31, 2019
Oct. 31, 2018
Oct. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Net Cash Provided by (Used in) Operating Activities $ 998 $ 555 $ 328
Net Cash Provided by (Used in) Investing Activities (196) (108) (1,722)
Net Cash Provided by (Used in) Financing Activities $ (122) (341) 1,425
Previously Reported [Member]      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Net Cash Provided by (Used in) Operating Activities   555 328
Net Cash Provided by (Used in) Investing Activities   (116) (1,722)
Net Cash Provided by (Used in) Financing Activities   (335) 1,425
Accounting Standards Update 2016-15 [Member]      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Net Cash Provided by (Used in) Operating Activities   555  
Net Cash Provided by (Used in) Investing Activities   (110)  
Net Cash Provided by (Used in) Financing Activities   (341)  
Accounting Standards Update 2016-15 [Member] | Restatement Adjustment [Member]      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Net Cash Provided by (Used in) Operating Activities   0 0
Net Cash Provided by (Used in) Investing Activities   6 0
Net Cash Provided by (Used in) Financing Activities   $ (6) $ 0