Receivables Held for Investment, net - Receivables and Receivables held for Sale (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Modifications, primarily interest rate modifications		$ 129	$ 174	$ 276
Re-age of past due account		141	277	539
Total		270	451	815
First lien held for investment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	[1]	33	177	659
Second lien held for investment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	[1]	33	53	86
Real Estate Secured Receivables Held for Sale [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		204	221	70
Real estate secured [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		$ 270	$ 451	$ 815

[1] The amounts for 2016 reflect the classification as TDR Loans prior to the transfer of all receivables to receivables held for sale during the third quarter of 2016.