Quarterly report pursuant to Section 13 or 15(d)

Amount and Location in the Income Statement for Derivatives Designed as Cash Flow Hedges (Detail)

v3.2.0.727
Amount and Location in the Income Statement for Derivatives Designed as Cash Flow Hedges (Detail) - Cash Flow Hedging [Member] - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain (Loss) Recognized in OCI on Derivative (Effective Portion) $ (172) $ (32) $ 147 $ (71)
Interest Rate Contracts        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain (Loss) Recognized in OCI on Derivative (Effective Portion) 1 (1) 0 (3)
Foreign Exchange Contracts        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain (Loss) Recognized in OCI on Derivative (Effective Portion) $ (173) $ (31) $ 147 $ (68)