Inventory - Schedule of Inventory, Noncurrent (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Inventory Disclosure [Abstract]
Completed unsold VOIs	$ 526	$ 515
Construction in process	193	186
Land, infrastructure and other	1	1
Inventory	$ 720	$ 702

Amount of real estate which is available for sale in the form of shared property ownership in which rights vest in several owners (buyers, timeshare holders) to use the property for a specified period each year (timeshare). Included in this item would be real estate assets in which timeshares are for sale, such as in condominiums at timeshare resorts. Excluded from this item would be assets, other than real estate, in which the Entity has sold or intends to sell timeshares, such as for cruises, recreational vehicles, campgrounds, aircraft (fractional ownership) and other types of rights.

No definition available.

Name:	us-gaap_InventoryRealEstateTimeshareAvailableForSale
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant