Revenue from Contracts with Customers - Schedule of Disaggregated Revenues by Segment from Contracts with Customers (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Disaggregation Of Revenue [Line Items]
Total revenues	$ 466	$ 427	$ 1,370	$ 1,357
Sales of VOIs, Net
Disaggregation Of Revenue [Line Items]
Total revenues	138	99	383	427
Sales, Marketing, Brand and Other Fees
Disaggregation Of Revenue [Line Items]
Total revenues	143	152	429	423
Real Estate and Financing Segment
Disaggregation Of Revenue [Line Items]
Total revenues	324	291	939	967
Real Estate and Financing Segment | Sales of VOIs, Net
Disaggregation Of Revenue [Line Items]
Total revenues	138	99	383	427
Real Estate and Financing Segment | Sales, Marketing, Brand and Other Fees
Disaggregation Of Revenue [Line Items]
Total revenues	143	152	429	423
Real Estate and Financing Segment | Interest Income
Disaggregation Of Revenue [Line Items]
Total revenues	37	35	109	103
Real Estate and Financing Segment | Other Financing Revenue
Disaggregation Of Revenue [Line Items]
Total revenues	6	5	18	14
Resort Operations and Club Management Segment
Disaggregation Of Revenue [Line Items]
Total revenues	99	100	303	280
Resort Operations and Club Management Segment | Club Management
Disaggregation Of Revenue [Line Items]
Total revenues	28	25	80	71
Resort Operations and Club Management Segment | Resort Management
Disaggregation Of Revenue [Line Items]
Total revenues	17	15	50	45
Resort Operations and Club Management Segment | Rental
Disaggregation Of Revenue [Line Items]
Total revenues	48	53	153	144
Resort Operations and Club Management Segment | Ancillary Services
Disaggregation Of Revenue [Line Items]
Total revenues	$ 6	$ 7	$ 20	$ 20