Annual report pursuant to Section 13 and 15(d)

Long-Term Debt and Borrowing Arrangements (Narrative) (Details)

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Long-Term Debt and Borrowing Arrangements (Narrative) (Details) - USD ($)
 1 Months Ended 12 Months Ended
May 25, 2023
Apr. 08, 2022
Aug. 31, 2020
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
May 31, 2018
Debt Instrument [Line Items]              
Debt instrument, interest rate, stated percentage       4.77% 3.79%    
Hedging ineffectiveness recognized       $ 0 $ 0 $ 0  
Reclassification during next twelve months       29,000,000      
Interest expense       108,000,000 85,000,000 94,000,000  
Interest paid       103,000,000 82,000,000 96,000,000  
Interest Income, Other       6,000,000 5,000,000 1,000,000  
Early extinguishment of debt       3,000,000 2,000,000 18,000,000  
Interest Rate Swap              
Debt Instrument [Line Items]              
Derivative, Notional Amount             $ 1,100,000,000
Effect of interest rate swaps in interest expense       $ 36,000,000 $ (2,000,000) $ (26,000,000)  
Interest Rate Swap 1              
Debt Instrument [Line Items]              
Derivative, Notional Amount             600,000,000
Interest Rate Swap 2              
Debt Instrument [Line Items]              
Derivative, Notional Amount             500,000,000
Interest Rate Swap 3              
Debt Instrument [Line Items]              
Derivative, Notional Amount             600,000,000
Interest Rate Swap 4              
Debt Instrument [Line Items]              
Derivative, Notional Amount             200,000,000
Capital lease | Wyndham Worldwide              
Debt Instrument [Line Items]              
Debt instrument, interest rate, stated percentage       4.50% 4.50%    
Line of Credit              
Debt Instrument [Line Items]              
Debt instrument, face amount       $ 2,350,000,000      
$400 million term loan A (due April 2027) | Long-term Debt              
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    
Interest Rate Cash Flow Hedge Asset at Fair Value       13,000,000 53,000,000    
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%        
Proceeds from Issuance of Unsecured Debt     $ 492,000,000        
Senior Unsecured Notes due August 2028 [Member] | Senior Notes              
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    
Term Loan due 2027 | Long-term Debt              
Debt Instrument [Line Items]              
Debt instrument, face amount       400,000,000      
Periodic payment, year one, percentage   0.00%          
Periodic payment, year two and three, percentage   5.00%          
Periodic payment, year four and five, percentage   7.50%          
Debt instrument, interest rate, stated percentage         5.92%    
Long-term debt   $ 400,000,000   384,000,000 $ 399,000,000    
Senior Unsecured Notes due April 2026 [Member]              
Debt Instrument [Line Items]              
Debt instrument, face amount     $ 500,000,000        
Debt instrument, interest rate, stated percentage     5.375%        
Term Loan due 2030 | Long-term Debt              
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 Secured Credit Facility              
Debt Instrument [Line Items]              
Aggregate amount of revolving loans (not to exceed)       $ 650,000,000      
Base Rate | Term Loan due 2030              
Debt Instrument [Line Items]              
Basis spread on variable rate (as a percent) 1.25%            
Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate | Term Loan due 2027              
Debt Instrument [Line Items]              
Basis spread on variable rate, floor (as a percent)   0.10%          
Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate | Term Loan due 2030              
Debt Instrument [Line Items]              
Basis spread on variable rate (as a percent) 2.25%            
Basis spread on variable rate, floor (as a percent) 0.00%            
Secured Overnight Financing Rate (SOFR) Overnight Index Swap Adjustment Rate, Per Annum | Term Loan due 2030              
Debt Instrument [Line Items]              
Basis spread on variable rate (as a percent) 0.10%            
Minimum | Base Rate | Term Loan due 2027              
Debt Instrument [Line Items]              
Basis spread on variable rate (as a percent)   0.50%          
Minimum | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate | Term Loan due 2027              
Debt Instrument [Line Items]              
Basis spread on variable rate, floor (as a percent)   1.50%          
Maximum | Base Rate | Term Loan due 2027              
Debt Instrument [Line Items]              
Basis spread on variable rate (as a percent)   1.00%          
Maximum | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate | Term Loan due 2027              
Debt Instrument [Line Items]              
Basis spread on variable rate, floor (as a percent)   2.00%          
Weighted Average | Interest Rate Swap 1              
Debt Instrument [Line Items]              
Fixed interest rate on interest rate swap       2.33%      
Weighted Average | Interest Rate Swap 2              
Debt Instrument [Line Items]              
Fixed interest rate on interest rate swap       0.91%      
Weighted Average | Interest Rate Swap 3              
Debt Instrument [Line Items]              
Fixed interest rate on interest rate swap       3.84%      
Weighted Average | Interest Rate Swap 4              
Debt Instrument [Line Items]              
Fixed interest rate on interest rate swap       3.55%      
$750 million revolving credit facility (due May 2023)              
Debt Instrument [Line Items]              
Maximum borrowing capacity       $ 750,000,000     $ 750,000,000
Debt instrument term       5 years      
Debt issuance costs       $ 3,000,000 4,000,000    
$750 million revolving credit facility (due May 2023) | Line of Credit              
Debt Instrument [Line Items]              
Debt instrument, face amount       750,000,000      
Long-term debt       $ 160,000,000 $ 0    
$750 million revolving credit facility (due May 2023) | Secured Overnight Financing Rate (SOFR) | Variable Rate Component Two              
Debt Instrument [Line Items]              
Basis spread on variable rate (as a percent)   0.10%          
$750 million revolving credit facility (due May 2023) | Minimum | Base Rate              
Debt Instrument [Line Items]              
Basis spread on variable rate (as a percent)   0.50%          
$750 million revolving credit facility (due May 2023) | Minimum | Secured Overnight Financing Rate (SOFR) | Variable Rate Component One              
Debt Instrument [Line Items]              
Basis spread on variable rate (as a percent)   1.50%          
$750 million revolving credit facility (due May 2023) | Maximum | Base Rate              
Debt Instrument [Line Items]              
Basis spread on variable rate (as a percent)   1.00%          
$750 million revolving credit facility (due May 2023) | Maximum | Secured Overnight Financing Rate (SOFR) | Variable Rate Component One              
Debt Instrument [Line Items]              
Basis spread on variable rate (as a percent)   2.00%