Vacation Ownership Notes Receivable - Loan Loss Reserve (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Vacation ownership loans - securitized [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	$ 66	$ 68	$ 80	$ 82
Provisions for loan losses	2		2	2
Other	(6)	(7)	(20)	(23)
Ending Balance	62	61	62	61
Vacation ownership loans - unsecuritized [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	63	80	56	79
Provisions for loan losses	8	7	20	20
Write-offs	(9)	(12)	(28)	(40)
Other	6	7	20	23
Ending Balance	68	82	68	82
Vacation ownership interest [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	129	148	136	161
Provisions for loan losses	10	7	22	22
Write-offs	(9)	(12)	(28)	(40)
Ending Balance	$ 130	$ 143	$ 130	$ 143