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Commitments And Contingencies - Additional Information (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Schedule Of Commitments And Contingencies [Line Items]      
Future sublease rental inflows $ 4    
Operating leases, residual value of leased assets 202    
Loss Contingency, Damages Sought, Value 25    
Loss Contingency, Range of Possible Loss, Portion Not Accrued 25    
Vehicle purchase commitments over the next 12 months 7,200    
Aggregate purchase obligations 160    
Receivables due from former subsidiaries 433 $ 352 $ 378
Liabilities accrued for asset retirement obligations 24 $ 25  
Realogy      
Schedule Of Commitments And Contingencies [Line Items]      
Receivables due from former subsidiaries 54    
Wyndham      
Schedule Of Commitments And Contingencies [Line Items]      
Receivables due from former subsidiaries $ 33