Receivables Held for Sale - Real Estate Secured Receivables (Details) - USD ($) $ in Millions	Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013	[1]	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables held for sale	$ 8,265	[1],[2]	$ 860	[1],[2]	$ 2,047		$ 6,203
First lien [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables held for sale	8,110		860
Second lien [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables held for sale	$ 155		$ 0

[1] Real estate secured receivables held for sale in the table above are presented net of the valuation allowance.

[2] The balances included in this table reflect the principal amount outstanding on the loan net of any charge-off recorded in accordance with our existing charge-off policies but exclude any basis adjustments to the loan such as unearned income, unamortized deferred fees and costs on originated loans, purchase accounting fair value adjustments and premiums or discounts on purchased loans. Additionally, the balances in this table related to receivables which have been classified as held for sale have been reduced by the lower of amortized cost or fair value adjustment recorded as well as the credit loss reserves associated with these receivables prior to the transfer.