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DEBT Debt (Textuals) (Details) - USD ($)
$ in Millions
9 Months Ended
Jul. 31, 2020
Oct. 31, 2019
Short-term Debt [Line Items]    
Repayments of acquired debt $ 7  
Letters of Credit Outstanding, Amount 36 $ 37
Long Term Debt Fair Value Over Carrying Value $ 270 $ 139