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 6 Months Ended
Jun. 30, 2013
Jun. 30, 2013
Financing Receivable, Impaired [Line Items]    
Purchased Credit Impaired Loans, Unpaid Principal Balance $ 5,300,000,000 $ 5,300,000,000
Impaired Financing Receivable, Unpaid Principal Balance 5,100,000,000 5,100,000,000
Impaired Financing Receivable, Recorded Investment 4,000,000,000 4,000,000,000
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities [Abstract]    
Contractually required payments including interest 7,433,000,000 7,433,000,000
Less: Non accretable difference (2,465,000,000) (2,465,000,000)
Cash flows expected to be collected 4,968,000,000 [1] 4,968,000,000 [1]
Less: Accretable Yield (851,000,000) (851,000,000)
Fair value of loans acquired 4,117,000,000 4,117,000,000
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]    
Accretable yield, June 30, 2013 (851,000,000) (851,000,000)
Consumer Portfolio Segment [Member]
    
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities [Abstract]    
Less: Accretable Yield 1,229,000,000 1,229,000,000
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]    
Accretable yield, beginning of period 677,000,000 0
Acquisitions 135,000,000 851,000,000
Accretions (38,000,000) (72,000,000)
Disposals/transfers (7,000,000) (12,000,000)
Reclassifications from nonaccretable difference 462,000,000 462,000,000
Accretable yield, June 30, 2013 1,229,000,000 1,229,000,000
PCI Loan Receivables [Member]
    
Financing Receivable, Impaired [Line Items]    
Purchased Credit Impaired Loans, Unpaid Principal Balance 5,300,000,000 5,300,000,000
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]    
Purchased Credit Impaired Loans, Recorded Investment   $ 4,100,000,000
[1] presents undiscounted expected principal and interest cash flows