Quarterly report pursuant to Section 13 or 15(d)

Revenue Recognition (Capitalized Contract Costs) (Details)

v3.21.2
Revenue Recognition (Capitalized Contract Costs) (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2021
Dec. 31, 2020
Capitalized Contract Cost [Line Items]    
Contract with Customer, Liability, Revenue Recognition Term 1 year  
Vacation Ownership    
Capitalized Contract Cost [Line Items]    
Capitalized Contract Cost, Amortization Period 1 year  
Other Assets | Vacation Ownership    
Capitalized Contract Cost [Line Items]    
Capitalized contract costs $ 29 $ 41
Other Assets | Travel and Membership    
Capitalized Contract Cost [Line Items]    
Capitalized contract costs $ 17 $ 16