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TRADE STRUCTURED FINANCE PROGRAM (DETAILS) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Trade structured finance program      
Weighted-average interest rate of time deposits (as a percent) 2.21% 4.33%  
Letter of Credit Obligations under Trade Structured Finance Program Carrying Amounts $ 325 $ 1,343  
Total net proceeds from issuances of LCs 5,563 7,058 $ 11,288
Time deposits, LCs, foreign exchange contracts presented net in the balance sheet      
Trade structured finance program      
Face value of time deposits, LCs, and foreign exchange contracts 3,394 3,630  
Level 2      
Trade structured finance program      
Time Deposits under Trade Structured Finance Program Fair Values 325 1,343  
Letter of Credit Obligations under Trade Structured Finance Program Fair Values 323 1,353  
Foreign Exchange Contract related to Trade Structured Finance Program Fair Values $ (2) $ 10