Receivables, net - Nonaccrual Receivables (Detail) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2016	Dec. 31, 2015
Nonaccrual receivables:
Criteria for nonaccrual status (Minimum days contractually delinquent)		90 days
Total nonaccrual receivables	[1]	$ 666	$ 669
Nonaccrual loans carried at lower of amortized cost of fair value less cost to sell but less than 90 days delinquent		541	501
Real Estate Secured [Member]
Nonaccrual receivables:
Nonaccrual real estate secured receivables carried at lower amortized cost or fair value		149	187
Real estate secured [Member]
Nonaccrual receivables:
Total nonaccrual receivables	[2],[3]	222	283
Nonaccrual receivables held for sale [Member]
Nonaccrual receivables:
Total nonaccrual receivables	[3]	$ 444	$ 386

[1] Nonaccrual receivables do not include receivables totaling $541 million and $501 million at March 31, 2016 and December 31, 2015, respectively, which are less than 90 days contractually delinquent and not accruing interest.

[2] At March 31, 2016 and December 31, 2015, nonaccrual real estate secured receivables held for investment include $149 million and $187 million, respectively, of receivables that are carried at the lower of amortized cost or fair value of the collateral less cost to sell.

[3] 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 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.