Annual report pursuant to Section 13 and 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 $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Loans and Leases Receivable Disclosure [Abstract]      
Loans held-for-sale $ 12,836,000,000us-gaap_LoansReceivableHeldForSaleNet $ 11,362,000,000us-gaap_LoansReceivableHeldForSaleNet  
Proceeds including cash and securities from sales securitizations and paydowns of loans held for sale 40,100,000,000us-gaap_ProceedsFromSaleAndCollectionOfLoansHeldforsale 81,000,000,000us-gaap_ProceedsFromSaleAndCollectionOfLoansHeldforsale 58,000,000,000us-gaap_ProceedsFromSaleAndCollectionOfLoansHeldforsale
Originations and purchases $ (40,113,000,000)us-gaap_PaymentsForOriginationAndPurchasesOfLoansHeldForSale $ (65,688,000,000)us-gaap_PaymentsForOriginationAndPurchasesOfLoansHeldForSale $ (59,540,000,000)us-gaap_PaymentsForOriginationAndPurchasesOfLoansHeldForSale