Inventory - Schedule of Inventory, Noncurrent (Details) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Inventory Disclosure [Abstract]
Completed unsold VOIs	$ 191	$ 191
Construction in process	115	60
Land, infrastructure and other	258	258
Inventory	$ 564	$ 509

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