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
Sep. 30, 2013
Dec. 31, 2012
Carrying and fair values of financial instruments    
Deposits $ 1,110,118 $ 1,105,261
Long-term debt 255,331 275,585
Carrying Value [Member]
   
Carrying and fair values of financial instruments    
Loans 890,469 859,875
Loans held-for-sale 15,001 19,413
Deposits 1,110,118 1,105,261
Long-term debt 255,331 275,585
Commercial unfunded lending commitments 888 1,000
Fair Value [Member]
   
Carrying and fair values of financial instruments    
Loans 907,595 877,880
Loans held-for-sale 15,001 19,408
Deposits 1,110,427 1,105,669
Long-term debt 263,966 283,474
Commercial unfunded lending commitments 4,300 4,500
Fair Value, Inputs, Level 2 [Member] | Fair Value [Member]
   
Carrying and fair values of financial instruments    
Loans 105,404 105,119
Loans held-for-sale 13,447 15,087
Deposits 1,110,427 1,105,669
Long-term debt 261,903 281,173
Fair Value, Inputs, Level 3 [Member] | Fair Value [Member]
   
Carrying and fair values of financial instruments    
Loans 802,191 772,761
Loans held-for-sale 1,554 4,321
Deposits      
Long-term debt $ 2,063 $ 2,301