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
Jun. 30, 2013
Dec. 31, 2012
Carrying and fair values of financial instruments    
Deposits $ 1,080,783 $ 1,105,261
Long-term debt 262,480 275,585
Carrying Value [Member]
   
Carrying and fair values of financial instruments    
Loans 876,510 859,875
Loans held-for-sale 14,549 19,413
Deposits 1,080,783 1,105,261
Long-term debt 262,480 275,585
Commercial unfunded lending commitments (958) (1,000)
Fair Value [Member]
   
Carrying and fair values of financial instruments    
Loans 890,937 877,880
Loans held-for-sale 14,549 19,408
Deposits 1,081,110 1,105,669
Long-term debt 269,161 283,474
Commercial unfunded lending commitments (4,500) (4,500)
Fair Value, Inputs, Level 2 [Member] | Fair Value [Member]
   
Carrying and fair values of financial instruments    
Loans 103,060 105,119
Loans held-for-sale 11,329 15,087
Deposits 1,081,110 1,105,669
Long-term debt 267,271 281,173
Fair Value, Inputs, Level 3 [Member] | Fair Value [Member]
   
Carrying and fair values of financial instruments    
Loans 787,877 772,761
Loans held-for-sale 3,220 4,321
Deposits      
Long-term debt $ 1,890 $ 2,301