Fair Value of Financial Instruments (Details) (USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010
Assets :
Restricted cash, Carrying amount	$ 1	$ 10
Securitized vacation ownership notes receivable, Carrying amount	351	408
Other notes receivable, Carrying amount	19	19
Total financial assets, Carrying amount	550	569
Restricted Cash, Fair value	1	10
Vacation ownership notes receivable Fair value	210	153
Securitized vacation ownership notes receivable, Fair value	423	492
Other notes receivable, Fair value	19	19
Total financial assets, Fair value	653	674
Liabilities:
Long-term debt, Carrying amount	2,188	2,848
Long-term securitized vacation ownership debt, Carrying amount	301	367
Total financial liabilities, Carrying amount	2,489	3,215
Long-term debt, Fair value	2,448	3,120
Long-term securitized vacation ownership debt, Fair value	316	373
Total financial liabilities, Fair value	2,764	3,493
Off-Balance sheet:
Letters of credit, Carrying amount	0	0
Surety bonds, Carrying amount	0	0
Total off-balance sheet, Carrying amount	0	0
Letters of credit, Fair value	162	159
Surety bonds, Fair value	24	23
Total off-balance sheet, Fair value	186	182
Vacation Ownership Interest [Member]
Assets :
Vacation ownership notes receivable, Carrying amount	$ 179	$ 132