Quarterly report pursuant to Section 13 or 15(d)

Fair Value of Financial Instruments (Details)

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Fair Value of Financial Instruments (Details) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2012
Dec. 31, 2011
Carrying and fair values of financial instruments    
Deposits $ 1,041,311 $ 1,033,041
Long-term debt 354,912 372,265
Carrying Value [Member]
   
Carrying and fair values of financial instruments    
Loans 848,606 870,520
Loans Held For Sale 12,973  
Deposits 1,041,311 1,033,041
Long-term debt 354,912 372,265
Fair Value [Member]
   
Carrying and fair values of financial instruments    
Loans 837,265 843,392
Loans Held For Sale 12,978  
Deposits 1,041,388 1,033,248
Long-term debt 348,030 343,211
Fair Value, Inputs, Level 2 [Member] | Fair Value [Member]
   
Carrying and fair values of financial instruments    
Loans 111,541  
Loans Held For Sale 8,654  
Deposits 1,041,388  
Long-term debt 345,530  
Fair Value, Inputs, Level 3 [Member] | Fair Value [Member]
   
Carrying and fair values of financial instruments    
Loans 725,724  
Loans Held For Sale 4,324  
Deposits     
Long-term debt $ 2,500