v2.4.0.6
Deposits (Details) (USD $)
Dec. 31, 2011
Dec. 31, 2010
Deposits (Textuals) [Abstract]    
Amount of Foreign deposits with a denomination of $100,000 or more $ 13,600,000,000 $ 16,700,000,000
Demand deposit overdrafts as loan balances 649,000,000 557,000,000
Domestic [Member]
   
Time Deposits, by Maturity [Abstract]    
2012 31,675,000,000  
2013 21,479,000,000  
2014 5,447,000,000  
2015 8,538,000,000  
2016 5,964,000,000  
Thereafter 3,427,000,000  
Total 76,530,000,000 90,600,000,000
Contractual Maturities, Time Deposits, $100,000 or More [Abstract]    
Three months or less 3,427,000,000  
After three months through six months 2,828,000,000  
After six months through twelve months 3,034,000,000  
After twelve months 15,804,000,000  
Total 25,093,000,000 33,900,000,000
Deposits (Textuals) [Abstract]    
Time certificates of deposit and other time deposits issued by domestic offices 76,530,000,000 90,600,000,000
Amount of domestic time deposits with a denomination of $100,000 or more $ 25,093,000,000 $ 33,900,000,000