Subsequent Events Additional Information (Detail) (Subsequent Event [Member], USD $) In Millions, unless otherwise specified	1 Months Ended
	Oct. 24, 2012	Oct. 02, 2012
Subsequent Event [Line Items]
Proceeds from sale of assets held for sale		$ 265
Issuance of fixed rate notes	166
Transaction costs	2
Unrestricted net cash proceeds from the transaction	140
Timeshare Mortgages [Member]
Subsequent Event [Line Items]
Time share mortgages securitized	$ 174
Securitization advance rate	95.00%
Note yield percentage	2.02%