Quarterly report pursuant to Section 13 or 15(d)

Outstanding Loans and Leases - Loans Held-for-Sale (Details)

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Outstanding Loans and Leases - Loans Held-for-Sale (Details) (USD $)
3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Dec. 31, 2011
Outstanding Loans and Leases [Abstract]      
Loans Receivable Held-for-sale, Net $ 12,973,000,000   $ 13,762,000,000
Proceeds from sales securitizations and paydowns of loans held for sale 10,000,000,000 59,700,000,000  
Proceeds used for originations and purchase of loan held for sale $ 10,500,000,000 $ 48,500,000,000