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Vacation Ownership Notes Receivable (Details) (USD $)
In Millions, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Notes receivable (net of reserves) related to vacation ownership loans    
Net notes receivable $ 609 $ 623
Less: current portion    
Notes Receivable Noncurrent 526 539
Vacation Ownership Interest Securitized [Member]
   
Notes receivable (net of reserves) related to vacation ownership loans    
Net notes receivable 441 510
Less: current portion    
Notes receivable, current (60) (64)
Vacation Ownership Interest Unsecuritized [Member]
   
Notes receivable (net of reserves) related to vacation ownership loans    
Net notes receivable 168 113
Less: current portion    
Notes receivable, current $ (23) $ (20)