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DERIVATIVE INSTRUMENTS (Details 5) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Apr. 30, 2016
Apr. 30, 2015
Apr. 30, 2016
Apr. 30, 2015
Classification and gains (losses) including accrued interest expense related to derivative instruments        
Not designated as hedges, gains (losses) $ (243) $ (52) $ (87) $ 214
Interest Rate Contracts | OCI        
Classification and gains (losses) including accrued interest expense related to derivative instruments        
Cash flow hedges, recognized in OCI, effective portion, gains (losses)   (1) (3) (6)
Interest Rate Contracts | Interest Expense        
Classification and gains (losses) including accrued interest expense related to derivative instruments        
Fair value hedges, gains (losses) 30 (77) 144 144
Not designated as hedges, gains (losses) 5 1 3 (12)
Interest Rate Contracts | Interest Expense | Cash Flow Hedges Member        
Classification and gains (losses) including accrued interest expense related to derivative instruments        
Cash flow hedges, reclassified from OCI, effective portion, gains (losses) (2) (3) (5) (6)
Foreign Exchange Contracts | OCI        
Classification and gains (losses) including accrued interest expense related to derivative instruments        
Cash flow hedges, recognized in OCI, effective portion, gains (losses) (1) 1 1 2
Foreign Exchange Contracts | Cost of Sales        
Classification and gains (losses) including accrued interest expense related to derivative instruments        
Not designated as hedges, gains (losses) (62) (19) (29) 26
Foreign Exchange Contracts | Other Operating Expense        
Classification and gains (losses) including accrued interest expense related to derivative instruments        
Not designated as hedges, gains (losses) (186) (34) (61) 200
Foreign Exchange Contracts | Other Operating Expense | Cash Flow Hedges Member        
Classification and gains (losses) including accrued interest expense related to derivative instruments        
Cash flow hedges, reclassified from OCI, effective portion, gains (losses) $ (1) $ 1 $ 1 $ 2