Quarterly report pursuant to Section 13 or 15(d)

Loans, Notes and Mortgages - Loans Outstanding (Details)

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Loans, Notes and Mortgages - Loans Outstanding (Details) (USD $)
In Billions, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Other Loans [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans held-for-sale $ 2.0 [1] $ 2.5 [1]
Consumer Loan [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Number of loans in portfolio 23,000  
Loans held-for-sale 0.8 [1] 1.0 [1]
Commercial Loan [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Number of loans in portfolio 800  
Loans held-for-sale $ 1.2 [1] $ 1.5 [1]
[1] Includes securities-backed loans and loans held-for-sale of $8.9 billion and $2.5 billion, respectively, as of December 31, 2011.