Vacation Ownership Notes Receivable - Notes Receivable (Net of Reserves) Related to Vacation Ownership Loans (Detail) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Accounts Notes And Loans Receivable [Line Items]    
Net notes receivable $ 601 $ 605
Notes receivable noncurrent 516 522
Vacation ownership loans - securitized [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Net notes receivable 256 274
Notes receivable, current (46) (47)
Vacation ownership loans - unsecuritized [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Net notes receivable 345 331
Notes receivable, current $ (39) $ (36)