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DERIVATIVE INSTRUMENTS (Details 6) (USD $)
In Millions, unless otherwise specified
Apr. 30, 2015
Oct. 31, 2014
Apr. 30, 2014
DERIVATIVE INSTRUMENTS      
Fair value of derivatives with credit-risk-related contingent features in a liability position $ 51us-gaap_DerivativeNetLiabilityPositionAggregateFairValue $ 57us-gaap_DerivativeNetLiabilityPositionAggregateFairValue $ 112us-gaap_DerivativeNetLiabilityPositionAggregateFairValue
Derivative Assets      
Gross amounts recognized 404us-gaap_DerivativeFairValueOfDerivativeAsset 353us-gaap_DerivativeFairValueOfDerivativeAsset 332us-gaap_DerivativeFairValueOfDerivativeAsset
Netting arrangements (76)us-gaap_DerivativeAssetFairValueGrossLiability (76)us-gaap_DerivativeAssetFairValueGrossLiability (95)us-gaap_DerivativeAssetFairValueGrossLiability
Collateral received (1)us-gaap_DerivativeCollateralObligationToReturnCash (5)us-gaap_DerivativeCollateralObligationToReturnCash (5)us-gaap_DerivativeCollateralObligationToReturnCash
Net amount 327us-gaap_DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral 272us-gaap_DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral 232us-gaap_DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral
Derivative Liabilities      
Gross amounts recognized 153us-gaap_DerivativeFairValueOfDerivativeLiability 110us-gaap_DerivativeFairValueOfDerivativeLiability 169us-gaap_DerivativeFairValueOfDerivativeLiability
Netting arrangements (76)us-gaap_DerivativeLiabilityFairValueGrossAsset (76)us-gaap_DerivativeLiabilityFairValueGrossAsset (95)us-gaap_DerivativeLiabilityFairValueGrossAsset
Net amount $ 77us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral $ 34us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral $ 74us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral