Business Segments - Schedule of Segment Operating Performance Reconciled to Consolidated Amounts (Parenthetical) (Details) - USD ($) $ in Millions		2 Months Ended	3 Months Ended		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		$ 245	$ 928	$ 208	$ 1,497	$ 682
Intersegment eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	[1],[2]		(5)	(2)	(13)	(10)
Intersegment eliminations | Maximum
Segment Reporting, Revenue Reconciling Item [Line Items]
Rental expense for model units			1	1	1	1
Intersegment eliminations | Billing and Collection Services
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues			$ 5	$ 2	$ 13	$ 10

[1] (1) Includes charges to the real estate sales and financing segment from the resort operations and club management segment for fulfillment of discounted marking package stays at resorts. These charges totaled $5 million and $2 million for the three months ended September 30, 2021 and 2020. For the nine months ended September 30, 2021 and 2020, these charges totaled $13 million and $10 million, respectively.

[2] (2) Includes charges to the real estate sales and financing segment from the resort operations and club management segment for the rental of model units to show prospective buyers. These charges totaled less than $1 million for the three and nine months ended September 30, 2021 and 2020.