Fair Value (Carrying Amounts And Estimated Fair Values Of Financial Instruments) (Details) (USD $) In Millions	Sep. 30, 2011		Dec. 31, 2010
Vacation ownership contract receivables, net, carrying amount	$ 2,862		$ 2,982
Vacation ownership contract receivables, net, fair value	3,243		2,782
Total debt, carrying amount	3,829	[1]	3,744	[1]
Total debt, fair value	3,974	[1]	3,871	[1]
Foreign Exchange Contract [Member]
Derivative asset, carrying amount	4	[2]	4	[2]
Derivative asset, fair value	4	[2]	4	[2]
Derivative liability, carrying amount	(11)	[2]	(12)	[2]
Derivative liabilities, fair value	(11)	[2]	(12)	[2]
Interest Rate Contract [Member]
Derivative asset, carrying amount	7	[2]	7	[2]
Derivative asset, fair value	7	[2]	7	[2]
Derivative liability, carrying amount	(14)	[2]	(27)	[2]
Derivative liabilities, fair value	(14)	[2]	(27)	[2]
Bifurcated Conversion Feature [Member]
Derivative liabilities, fair value	(16)		(162)
Call Options [Member]
Derivative asset, carrying amount	16		162
Derivative asset, fair value	$ 16		$ 162

[1] As of September 30, 2011 and December 31, 2010, includes $16 million and $162 million, respectively, related to the Bifurcated Conversion Feature liability.

[2] Instruments are in net loss positions as of September 30, 2011 and December 31, 2010.