Annual report pursuant to Section 13 and 15(d)

DERIVATIVE INSTRUMENTS AND RISK MANAGEMENT - Additional Information (Detail)

v2.4.1.9
DERIVATIVE INSTRUMENTS AND RISK MANAGEMENT - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Collateral received under contractual provisions $ 548us-gaap_DerivativeCollateralObligationToReturnCash
Aggregate fair value additional collateral 0us-gaap_DerivativeNetLiabilityPositionAggregateFairValue
Maximum term over hedging exposures to the variability of cash flow 35 years
Pre-tax gains related to cash flow hedges that are currently deferred in AOCI and are expected to be reclassified to income over the 12 month period ended December 31, 2012 135us-gaap_CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths
Derivative, Collateral, Right to Reclaim Cash $ 1us-gaap_DerivativeCollateralRightToReclaimCash