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
Jun. 30, 2011
Dec. 31, 2010
Carrying and fair values of financial instruments    
Deposits   $ 1,010,430
Long-term debt   448,431
Carrying Value [Member]
   
Carrying and fair values of financial instruments    
Loans 882,653 876,739
Deposits 1,038,408 1,010,430
Long-term debt 426,659 448,431
Fair Value [Member]
   
Carrying and fair values of financial instruments    
Loans 862,646 861,695
Deposits 1,038,436 1,010,460
Long-term debt $ 426,645 $ 441,672