Revenue from Contracts with Customers - Schedule of Disaggregated Revenues by Segment from Contracts with Customers (Details) - USD ($) $ in Millions		3 Months Ended																12 Months Ended
		Dec. 31, 2020	[1]	Sep. 30, 2020	[1]	Jun. 30, 2020	[1]	Mar. 31, 2020	[1]	Dec. 31, 2019	[1]	Sep. 30, 2019	[1]	Jun. 30, 2019	[1]	Mar. 31, 2019	[1]	Dec. 31, 2020		Dec. 31, 2019		Dec. 31, 2018
Disaggregation Of Revenue [Line Items]
Total revenues		$ 212		$ 208		$ 123		$ 351		$ 468		$ 466		$ 454		$ 450		$ 894	[1]	$ 1,838	[1]	$ 1,999
Real Estate and Financing Segment
Disaggregation Of Revenue [Line Items]
Total revenues																		494		1,252		1,462
Resort Operations and Club Management Segment
Disaggregation Of Revenue [Line Items]
Total revenues																		264		418		390
Sales of VOIs, Net
Disaggregation Of Revenue [Line Items]
Total revenues																		108		509		734
Sales of VOIs, Net | Real Estate and Financing Segment
Disaggregation Of Revenue [Line Items]
Total revenues																		108		509		734
Sales, Marketing, Brand and Other Fees
Disaggregation Of Revenue [Line Items]
Total revenues																		221		573		570
Sales, Marketing, Brand and Other Fees | Real Estate and Financing Segment
Disaggregation Of Revenue [Line Items]
Total revenues																		221		573		570
Interest Income | Real Estate and Financing Segment
Disaggregation Of Revenue [Line Items]
Total revenues																		141		147		140
Other Financing Revenue | Real Estate and Financing Segment
Disaggregation Of Revenue [Line Items]
Total revenues																		24		23		18
Club Management | Resort Operations and Club Management Segment
Disaggregation Of Revenue [Line Items]
Total revenues																		96		125		112
Resort Management | Resort Operations and Club Management Segment
Disaggregation Of Revenue [Line Items]
Total revenues																		70		66		60
Rental | Resort Operations and Club Management Segment
Disaggregation Of Revenue [Line Items]
Total revenues	[2]																	91		201		191
Ancillary Services | Resort Operations and Club Management Segment
Disaggregation Of Revenue [Line Items]
Total revenues																		$ 7		$ 26		$ 27

[1] The sum of the earnings per share for the four quarters may differ from annual earnings per share due to the required method of computing the weighted average shares in interim periods.

[2] Excludes intersegment eliminations. See Note 22: Business Segments for additional information.