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Vacation Ownership Contract Receivables (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Vacation Ownership Contract Receivables [Abstract]      
Interest income on securitized receivables $ 405 $ 363 $ 340
Originated vacation ownership contract receivables 1,500 1,510 1,390
Vacation ownership contract principal collections $ 937 $ 890 $ 866
Contract Receivable Weighted Average Interest Rate 14.40% 14.10% 13.90%
Minimum days which Company ceases to accrue interest on VOI contract receivables 90 days    
VOI contract receivable written off as credit loss 120 days