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
Sep. 30, 2011
Dec. 31, 2010
Carrying and fair values of financial instruments    
Held-to-maturity debt securities $ 26,458 $ 427
Deposits 1,041,353 1,010,430
Long-term debt 398,965 448,431
Carrying Value [Member]
   
Carrying and fair values of financial instruments    
Held-to-maturity debt securities 26,458 [1] 427 [1]
Loans 876,199 876,739
Deposits 1,041,353 1,010,430
Long-term debt 398,965 448,431
Fair Value [Member]
   
Carrying and fair values of financial instruments    
Held-to-maturity debt securities 26,508 [1] 427 [1]
Loans 850,767 861,695
Deposits 1,041,840 1,010,460
Long-term debt $ 367,723 $ 441,672
[1] For more information on held-to-maturity debt securities, see Note 5 – Securities.