Securitized Vacation Ownership Debt - Long-Term and Short-Term Securitized Vacation Ownership Debt (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2012	Dec. 31, 2011
Debt Instrument [Line Items]
Long term debt including current maturities	$ 410	$ 532
Less current maturities	(111)	(130)
Long-term securitized debt	299	402
2005 securitization, interest rates ranging from [5.25% to 6.29%, maturing 2018] [Member]
Debt Instrument [Line Items]
Long term debt including current maturities	25	37
Interest rate minimum	5.25%	5.25%
Interest rate maximum	6.29%	6.29%
Maturity year of update instrument	2018	2018
2006 securitization, interest rates ranging from [5.28% to 5.85%, maturing 2018] [Member]
Debt Instrument [Line Items]
Long term debt including current maturities	20	27
Interest rate minimum	5.28%	5.28%
Interest rate maximum	5.85%	5.85%
Maturity year of update instrument	2018	2018
2009 securitization, interest rates at [5.81%, maturing 2015] [Member]
Debt Instrument [Line Items]
Long term debt including current maturities	69	92
Interest rate, stated rate	5.81%	5.81%
Maturity year of update instrument	2015	2015
2010 securitization, interest rates ranging from [3.65% to 4.75%, maturing 2021] [Member]
Debt Instrument [Line Items]
Long term debt including current maturities	150	190
Interest rate minimum	3.65%	3.65%
Interest rate maximum	4.75%	4.75%
Maturity year of update instrument	2021	2021
2011 securitization, interest rates ranging from [3.67% to 4.82%, maturing 2026] [Member]
Debt Instrument [Line Items]
Long term debt including current maturities	$ 146	$ 186
Interest rate minimum	3.67%	3.67%
Interest rate maximum	4.82%	4.82%
Maturity year of update instrument	2026	2026