Securitized Vacation Ownership Debt (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2011	Dec. 31, 2010
Long-term and short-term securitized vacation ownership debt
Securitized Vacation Ownership Debt	$ 388	$ 494
Less current maturities	(105)	(127)
Long-term securitized debt	283	367
2003 securitization, interest rates ranging from 3.95% to 6.96%, maturing 2018 [Member]
Long-term and short-term securitized vacation ownership debt
Securitized Vacation Ownership Debt	12	17
Interest rate, minimum	3.95%
Interest rate, maximum	6.96%
Maturity year of securitized vacation ownership debt	2018
2005 securitization, interest rates ranging from 5.25% to 6.29%, maturing 2018 [Member]
Long-term and short-term securitized vacation ownership debt
Securitized Vacation Ownership Debt	41	55
Interest rate, minimum	5.25%
Interest rate, maximum	6.29%
Maturity year of securitized vacation ownership debt	2018
2006 securitization, interest rates ranging from 5.28% to 5.85%, maturing 2018 [ Member]
Long-term and short-term securitized vacation ownership debt
Securitized Vacation Ownership Debt	29	39
Interest rate, minimum	5.28%
Interest rate, maximum	5.85%
Maturity year of securitized vacation ownership debt	2018
2009 securitization, interest rate at 5.81%, maturing 2016 [Member]
Long-term and short-term securitized vacation ownership debt
Securitized Vacation Ownership Debt	101	128
Interest rate, stated rate	5.81%
Maturity year of securitized vacation ownership debt	2016
2010 securitization, interest rates ranging from 3.65% to 4.75%, maturing 2021
Long-term and short-term securitized vacation ownership debt
Securitized Vacation Ownership Debt	$ 205	$ 255
Interest rate, minimum	3.65%
Interest rate, maximum	4.75%
Maturity year of securitized vacation ownership debt	2021