Annual report pursuant to Section 13 and 15(d)

DERIVATIVE INSTRUMENTS AND RISK MANAGEMENT - Additional Information (Detail)

v3.3.1.900
DERIVATIVE INSTRUMENTS AND RISK MANAGEMENT - Additional Information (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]    
Hedge margin liabilities $ 717 $ 548
Derivative, Collateral, Right to Reclaim Cash 0 $ 1
Aggregate fair value additional collateral $ 0  
Maximum term over hedging exposures to the variability of cash flow 17 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 $ 366