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Consolidations and Transfers of Financial Assets Qualifying Sales of Portfolio Securitizations (Details) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Transfers and Servicing [Abstract]        
Proceeds from the initial sale of securities from portfolio securitizations $ 0 $ 48,000,000 $ 0 $ 299,000,000