Receivables Held for Investment, net - Receivables (Detail) - USD ($) $ in Millions	Sep. 30, 2016		Dec. 31, 2015		Sep. 30, 2015
Real estate secured:
Total receivables	$ 0	[1],[2]	$ 9,156	[1],[2]	$ 9,629
Accrued interest income and other	0		142
Credit loss reserve for receivables	0		(311)
Total receivables held for investment, net	0		8,987
First lien [Member]
Real estate secured:
Total receivables	0		7,302		7,675
Second lien [Member]
Real estate secured:
Total receivables	$ 0		$ 1,854		$ 1,954

[1] At December 31, 2015, amount includes $1,654 million of closed-end real estate secured receivables which serve as collateral for secured financings previously issued under public trusts with an outstanding balance of $879 million at December 31, 2015. See Note 11, "Variable Interest Entities," for additional information.

[2] At December 31, 2015, amount includes deferred origination fees, net of costs, totaling $71 million and net unamortized premium on our receivables totaling $35 million.