Variable Interest Entities - Summary of Assets and Liabilities of Consolidated Secured Financing VIEs (Detail) - USD ($) $ in Millions		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Variable Interest Entity [Line Items]
Credit loss reserves		$ 0	$ (311)	$ (2,217)	$ (3,273)
Total receivables held for investment, net		0	8,987
Receivables held for sale	[1],[2]	5,674	8,265
Long-term debt		4,340	9,510
Variable Interest Entity [Member]
Variable Interest Entity [Line Items]
Real estate secured receivables held for investment		0	1,654
Accrued interest income and other		0	76
Credit loss reserves		0	(94)
Total receivables held for investment, net		0	1,636
Receivables held for sale		750	0
Total, Consolidated Assets		750	1,636
Other liabilities		(11)	(22)
Long-term debt	[3]	404	879
Total, Consolidated Liabilities		$ 393	$ 857
Secured financings – .93% to 3.24%; due 2017 to 2018 [Member] | Variable Interest Rate Debt [Member] | Minimum [Member]
Variable Interest Entity [Line Items]
Stated percentage		0.93%
Secured financings – .93% to 3.24%; due 2017 to 2018 [Member] | Variable Interest Rate Debt [Member] | Maximum [Member]
Variable Interest Entity [Line Items]
Stated percentage		3.24%

[1] At December 31, 2016, receivables held for sale includes $750 million of closed-end real estate secured receivables which are part of a collateralized funding transaction. These receivables will be sold when they are contractually released as collateral under the public trust and become available for sale. See Note 17, "Variable Interest Entities," for further discussion of our collateralized funding transactions.

[2] The receivable 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 receivables. 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.

[3] At December 31, 2016, the long-term debt in the secured financing VIE had interest rates ranging from .93 percent to 3.24 percent and maturity dates in 2017 and 2018.