Transfers of Financial Assets - Additional Information (Detail) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015 USD ($) Transactions	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) Transactions	Sep. 30, 2014 USD ($)
Fair Value Assumption, Date of Securitization or Asset-backed Financing Arrangement, Transferor's Continuing Involvement, Servicing Assets or Liabilities [Line Items]
Number of securitization transactions in which company has variable interest | Transactions	3		3
Principal amount of repurchased or replaced defaulted VOI notes receivable	$ 2	$ 4	$ 8	$ 13
Obligation to receive cash flows from VIE	7	$ 9	23	$ 30
Unsecuritized notes receivable	35		$ 35
2009 Securitization [Member]
Fair Value Assumption, Date of Securitization or Asset-backed Financing Arrangement, Transferor's Continuing Involvement, Servicing Assets or Liabilities [Line Items]
Cash payment for termination of securitization	$ 3