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Share-Based Compensation - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Allocated share-based compensation expense	$ 6	$ 5	$ 18	$ 13
Unrecognized compensation costs for unvested awards	$ 23		$ 23
Unrecognized compensation costs, weighted average period for recognition			1 year 10 months 24 days
Shares of common stock available for future issuance	6,485,046		6,485,046
Service Restricted Stock Units (RSUs)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares issued (in shares)			500,925
Grant date fair value (in dollars per share)			$ 33.07
Service Restricted Stock Units (RSUs) \| Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award vesting period			3 years
Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares issued (in shares)			544,209
Exercise price (in dollars per share)			$ 33.32
Grant date fair value (in dollars per share)			$ 12.29
Stock options exercisable (in shares)	624,145		624,145
Stock Options \| Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award vesting period			3 years
Performance RSUs
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares issued (in shares)			133,660
Grant date fair value (in dollars per share)			$ 33.32
Award vesting period			3 years
Performance RSUs \| Tranche One
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award vesting percentage			70.00%
Performance RSUs \| VOI sale \| Tranche Two
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award vesting percentage			30.00%