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Share-Based Compensation - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2020
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Allocated share-based compensation expense   $ 15 $ 22 $ 16
Total tax benefit recognized related to share-based compensation   4 $ 4 $ 4
Unrecognized compensation costs for unvested awards   $ 14    
Unrecognized compensation costs, weighted average period for recognition   1 year 8 months 12 days    
Shares of common stock available for future issuance   5,234,270    
2017 Employees Stock Purchase Plan        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Maximum shares of common stock issued under ESPP   2,500,000    
Shares of common stock issued   81,520 101,244  
2017 Employees Stock Purchase Plan | Minimum [Member]        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Percentage of fair market value per share of common stock   95.00%    
2017 Employees Stock Purchase Plan | Maximum        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Compensation expense related to ESPP   $ 1 $ 1  
Stock Options        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Stock options exercisable (in shares)   1,066,190    
Stock Options | Maximum        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Award vesting period   3 years    
Performance Shares        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Allocated share-based compensation expense   $ 2    
Number of shares granted   168,529    
Weighted average grant date fair value per share   $ 25.69    
Award vesting period   3 years    
Reversal of share based compensation expense $ 8      
Performance Shares | Adjusted EBITDA        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Number of shares granted [1]   117,975    
Weighted average grant date fair value per share [1]   $ 25.69    
Award vesting percentage   70.00%    
Performance Shares | Contract Sales        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Number of shares granted   50,554    
Weighted average grant date fair value per share   $ 25.69    
Performance Shares | VOI sale        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Award vesting percentage   30.00%    
Performance Shares | VOI sale | Contract Sales        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Award vesting percentage   30.00%    
[1] Represents our Adjusted EBITDA metric described in Part 1 of this Form 10-K, further adjusted by net recognition and deferral activity from sales of VOIs under construction.