Vacation Ownership Contract Receivables (Current And Long-Term Vacation Ownership Contract Receivables) (Details) (USD $) In Millions	Sep. 30, 2011	Dec. 31, 2010
Current vacation ownership contract receivables	$ 333	$ 331
Less: Allowance for loan losses	(39)	(36)
Current vacation ownership contract receivables, net	294	295
Long-term vacation ownership contract receivables	2,914	3,013
Less: Allowance for loan losses	(346)	(326)
Long-term vacation ownership contract receivables, net	2,568	2,687
Securitized [Member]
Current vacation ownership contract receivables	245	266
Long-term vacation ownership contract receivables	2,113	2,437
Non-Securitized [Member]
Current vacation ownership contract receivables	88	65
Long-term vacation ownership contract receivables	$ 801	$ 576

A valuation allowance relating to a written agreement to receive money (at a specified future date(s) within one year from the reporting date (or the normal operating cycle, whichever is longer), consisting of principal as well as any accrued interest) for the portion that is expected to be uncollectible.

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