Annual report pursuant to Section 13 and 15(d)

Long-Term Debt and Borrowing Arrangements (Schedule of Company's Indebtedness) (Details)

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Long-Term Debt and Borrowing Arrangements (Schedule of Company's Indebtedness) (Details) - USD ($)
Dec. 31, 2023
Dec. 31, 2022
Apr. 08, 2022
Aug. 31, 2020
May 31, 2018
Debt Instrument [Line Items]          
Debt instrument, interest rate, stated percentage 4.77% 3.79%      
Finance leases $ 39,000,000 $ 45,000,000      
Total long-term debt 2,201,000,000 2,077,000,000      
Less: Current portion of long-term debt 37,000,000 20,000,000      
Long-term debt 2,164,000,000 2,057,000,000      
Senior Unsecured Notes due August 2028 [Member]          
Debt Instrument [Line Items]          
Debt instrument, face amount       $ 500,000,000  
Debt instrument, interest rate, stated percentage       4.375%  
$750 million revolving credit facility (due May 2023)          
Debt Instrument [Line Items]          
Maximum borrowing capacity 750,000,000       $ 750,000,000
Debt issuance costs 3,000,000 4,000,000      
Line of Credit          
Debt Instrument [Line Items]          
Debt instrument, face amount 2,350,000,000        
Line of Credit | $750 million revolving credit facility (due May 2023)          
Debt Instrument [Line Items]          
Debt instrument, face amount 750,000,000        
Long-term debt $ 160,000,000 $ 0      
Debt, Weighted Average Interest Rate 7.30%        
Long-term Debt | $400 million term loan A (due April 2027)          
Debt Instrument [Line Items]          
Debt instrument, face amount $ 1,600,000,000        
Debt instrument, interest rate, stated percentage 3.70%      
Long-term debt $ 0 $ 1,139,000,000      
Long-term Debt | Term Loan due 2027          
Debt Instrument [Line Items]          
Debt instrument, face amount 400,000,000        
Debt instrument, interest rate, stated percentage   5.92%      
Long-term debt $ 384,000,000 $ 399,000,000 $ 400,000,000    
Debt, Weighted Average Interest Rate 6.82%        
Long-term Debt | Term Loan due 2030          
Debt Instrument [Line Items]          
Debt instrument, face amount $ 1,140,000,000        
Debt instrument, interest rate, stated percentage 4.10%        
Long-term debt $ 1,123,000,000 0      
Senior Notes | Senior Unsecured Notes due August 2028 [Member]          
Debt Instrument [Line Items]          
Debt instrument, face amount $ 500,000,000        
Debt instrument, interest rate, stated percentage 4.375%     4.375%  
Long-term debt $ 495,000,000 $ 494,000,000      
Debt, Weighted Average Interest Rate 4.38% 4.38%      
Term loan and senior unsecured notes          
Debt Instrument [Line Items]          
Debt issuance costs $ 16,000,000 $ 11,000,000      
Wyndham Worldwide | Capital lease          
Debt Instrument [Line Items]          
Debt instrument, interest rate, stated percentage 4.50% 4.50%