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Commitments And Contingencies (Detail)
$ in Millions
1 Months Ended 12 Months Ended
Nov. 30, 2017
lawsuit
Nov. 30, 2011
class
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Schedule Of Commitments And Contingencies [Line Items]          
Range of possible loss (up to)     $ 40    
Purchase obligation over the next twelve months     6,700    
Purchase commitment period increase     800    
Aggregate purchase obligations     102    
Receivables due from former subsidiaries     212 $ 134 $ 162
Liabilities accrued for asset retirement obligations     26 $ 28  
Realogy          
Schedule Of Commitments And Contingencies [Line Items]          
Receivables due from former subsidiaries     27    
Wyndham          
Schedule Of Commitments And Contingencies [Line Items]          
Receivables due from former subsidiaries     $ 16    
Jose Mendez v Avis Budget Group Inc | Electronic Toll Service Dispute          
Schedule Of Commitments And Contingencies [Line Items]          
Number of cases brought by plaintiffs | class   2      
Jose Mendez v Avis Budget Group Inc | Breach of Contract          
Schedule Of Commitments And Contingencies [Line Items]          
Number of claims filed | lawsuit 2        
Jose Mendez v Avis Budget Group Inc | Fines And Fees Charged To Renters          
Schedule Of Commitments And Contingencies [Line Items]          
Number of claims filed | lawsuit 1