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EARNINGS PER SHARE (Details 2) (USD $)
In Millions, unless otherwise specified
3 Months Ended 12 Months Ended
Mar. 31, 2013
Dec. 31, 2012
Dec. 31, 2013
Forecast
Non-cumulative perpetual preferred stock issued in fourth quarter of 2012
Dec. 31, 2013
Forecast
Non-cumulative perpetual preferred stock issued in first quarter of 2013
EARNINGS PER SHARE        
Issuance of non-cumulative perpetual preferred stock $ 575 $ 2,250    
Issuance of preferred stock        
Distribution of preferred dividends     $ 97 $ 19