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CONSOLIDATED BALANCE SHEET (Parenthetical) (USD $)
Sep. 30, 2012
Dec. 31, 2011
Securities held-to-maturity, fair value $ 2,000,000,000 $ 2,300,000,000
Fair value of commercial Loans held for sale 424,000,000 377,000,000
Interest bearing, designated under fair value option 9,400,000,000 9,800,000,000
Long-term debt, designated under fair value option $ 7,700,000,000 $ 5,000,000,000
Common stock, par value $ 5 $ 5
Common stock, shares authorized 150,000,000 150,000,000
Common stock, shares issued 712 712
Common stock, shares outstanding 712 712