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DERIVATIVE INSTRUMENTS (Details 3) - Not Designated as Hedging Instruments - USD ($)
$ in Millions
Jan. 31, 2016
Oct. 31, 2015
Jan. 31, 2015
Interest Rate Contracts      
Derivatives Not Designated as Hedging Instruments      
Notional amounts $ 6,060 $ 6,333 $ 6,252
Interest Rate Contracts | Purchased      
Derivatives Not Designated as Hedging Instruments      
Notional amounts 904 1,069 1,502
Interest Rate Contracts | Sold      
Derivatives Not Designated as Hedging Instruments      
Notional amounts 904 1,069 1,502
Foreign Exchange Contracts      
Derivatives Not Designated as Hedging Instruments      
Notional amounts 3,791 3,160 3,939
Cross-Currency Interest Rate Contracts      
Derivatives Not Designated as Hedging Instruments      
Notional amounts $ 73 $ 76 $ 97