Quarterly report pursuant to Section 13 or 15(d)

Loans, Notes and Mortgages - Purchased Credit Impaired Loans (Details)

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Loans, Notes and Mortgages - Purchased Credit Impaired Loans (Details) (USD $)
3 Months Ended
Mar. 31, 2013
Jan. 06, 2013
Mar. 31, 2013
Consumer Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]      
Impaired Financing Receivable, Unpaid Principal Balance $ 3,900,000,000 $ 3,900,000,000  
Impaired Financing Receivable, Recorded Investment 3,300,000,000 3,300,000,000  
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities [Abstract]      
Contractually required payments including interest   5,460,000,000  
Less: Nonaccretable difference   (1,440,000,000)  
Cash flows expected to be collected (1)   4,020,000,000 [1]  
Less: Accretable Yield   (716,000,000) 677,000,000
Fair value of loans acquired   3,304,000,000  
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]      
Accretable yield, January 1, 2013   (716,000,000) 0
Acquisitions     (716,000,000)
Accretions     (34,000,000)
Disposals/transfers     (5,000,000)
Accretable yield, March 31, 2013   $ (716,000,000) $ 677,000,000
[1] Represents undiscounted expected principal and interest cash flows.