Fair Value (Carrying Amounts And Estimated Fair Values Of Financial Instruments) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012		Dec. 31, 2011
Schedule of Carrying Amount and Estimated Fair Value of Financial Instruments [Line Items]
Vacation ownership contract receivables, net, carrying amount	$ 2,889		$ 2,848
Vacation ownership contract receivables, net, estimated fair value	3,391		3,232
Total debt, carrying amount	4,562	[1]	4,015	[1]
Total debt, estimated fair value	4,811	[1]	4,205	[1]
Bifurcated Conversion Feature [Member]
Schedule of Carrying Amount and Estimated Fair Value of Financial Instruments [Line Items]
Derivative liabilities, fair value			$ 24

[1] As of December 31, 2011, includes $24 million related to a bifurcated conversion feature liability.