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Subsequent Events - Additional Information (Detail) (Subsequent Event, USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2015
Jan. 29, 2015
Subsequent Event [Line Items]    
Business Combination, Consideration Transferred $ 50us-gaap_BusinessCombinationConsiderationTransferred1  
Secured Debt [Member] | Debt Due For Rental Car Funding [Member] | Avis Budget Rental Car Funding [Member]    
Subsequent Event [Line Items]    
Asset-backed notes issued   $ 650us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= car_DebtDueForRentalCarFundingMember
/ dei_LegalEntityAxis
= car_AvisBudgetRentalCarFundingMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Weighted average interest rate   2.70%us-gaap_LongtermDebtWeightedAverageInterestRate
/ us-gaap_DebtInstrumentAxis
= car_DebtDueForRentalCarFundingMember
/ dei_LegalEntityAxis
= car_AvisBudgetRentalCarFundingMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember