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OVERVIEW AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Restricted Cash (Details) - USD ($)
$ in Millions
Oct. 31, 2019
Oct. 31, 2018
Restricted Cash and Cash Equivalents Items [Line Items]    
Restricted Cash and Cash Equivalents, Noncurrent $ 2 $ 2
Restricted Cash and Cash Equivalents, Current $ 0 $ 2