Quarterly report pursuant to Section 13 or 15(d)

DERIVATIVE INSTRUMENTS AND RISK MANAGEMENT - Additional Information (Detail)

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DERIVATIVE INSTRUMENTS AND RISK MANAGEMENT - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2012
Y
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Collateral received under contractual provisions $ 56
Aggregate fair value additional collateral 11
Maximum term over hedging exposures to the variability of cash flow 39
Pre-tax losses related to cash flow hedges that are currently deferred in AOCI and are expected to be reclassified to income within twelve months $ 5