Accounts Payable and Accrued Expenses (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Accounts Payable and Accrued Liabilities [Abstract]
Repurchase eligible loans	$ 104	$ 53
Accounts payable	76	69
Accrued payroll and benefits	38	84
Accrued servicing related expenses	17	22
Accrued interest	16	16
Total	$ 251	$ 244