Revenue from Contracts with Customers - Remaining Transaction Price (Details) $ in Millions	9 Months Ended
	Sep. 30, 2021 USD ($)
Advanced deposits
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Remaining Transaction Price	$ 116
Recognition Period	18 months
Recognition Method	Upon customer stays
Annual dues and Legacy-HGV Club activation fees
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Remaining Transaction Price	$ 62
Recognition Period	7 years
Recognition Method	Straight-line basis over average inventory holding period
Bonus Points
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Remaining Transaction Price	$ 51
Recognition Method	Upon redemption
Bonus Points | Maximum
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Recognition Period	30 months
Bonus Points | Minimum
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Recognition Period	18 months