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Schedule Of Available Funding Under Vehicle Programs (Detail) - USD ($) $ in Millions | Dec. 31, 2015 | Dec. 31, 2014
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Debt Under Vehicle Programs And Borrowing Arrangements [Line Items] |  |
Leasing Vehicles And Related Assets Pledged As Collateralized Debt | $ 8,600 |
Debt under vehicle programs | 8,860 | $ 8,056
Debt Due To Rental Car Funding [Member] |  |
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items] |  |
Leasing Vehicles And Related Assets Pledged As Collateralized Debt | 8,400 |
Total Capacity | 8,892 |
Debt under vehicle programs | 6,837 | 6,340
Available Capacity | 2,055 |
Americas Debt Borrowings [Member] |  |
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items] |  |
Leasing Vehicles And Related Assets Pledged As Collateralized Debt | 900 |
Total Capacity | 983 |
Debt under vehicle programs | 643 | 746
Available Capacity | 340 |
International Debt Borrowings |  |
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items] |  |
Leasing Vehicles And Related Assets Pledged As Collateralized Debt | 1,500 |
Total Capacity | 2,109 |
Debt under vehicle programs | 1,187 | 685
Available Capacity | 922 |
International Capital Leases |  |
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items] |  |
Leasing Vehicles And Related Assets Pledged As Collateralized Debt | 200 |
Total Capacity | 259 |
Debt under vehicle programs | 238 | 314
Available Capacity | 21 |
Other |  |
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items] |  |
Total Capacity | 8 |
Debt under vehicle programs | 8 | $ 31
Available Capacity | 0 |
Debt Under Vehicle Programs [Member] |  |
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items] |  |
Total Capacity | 12,251 |
Debt under vehicle programs | 8,913 |
Available Capacity | $ 3,338 |

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- Definition Debt Under Vehicle Programs And Borrowing Arrangements [Line Items] + References No definition available. + Details
Name: | car_DebtUnderVehicleProgramsAndBorrowingArrangementsLineItems
Namespace Prefix: | car_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Leasing Vehicles And Related Assets, Pledged As Collateralized Debt + References No definition available. + Details
Name: | car_LeasingVehiclesAndRelatedAssetsPledgedAsCollateralizedDebt
Namespace Prefix: | car_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Amount of borrowing capacity currently available under the vehicle program (current borrowing capacity less the amount of borrowings outstanding). + References No definition available. + Details
Name: | car_VehicleProgramDebtAvailableCapacity
Namespace Prefix: | car_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Maximum borrowing capacity under the vehicle program without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the program. + References No definition available. + Details
Name: | car_VehicleProgramDebtTotalCapacity
Namespace Prefix: | car_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Vehicle Program Outstanding Debt + References No definition available. + Details
Name: | car_VehicleProgramOutstandingDebt
Namespace Prefix: | car_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | us-gaap_LongtermDebtTypeAxis=car_DebtDueToRentalCarFundingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_LongtermDebtTypeAxis=car_AmericasDebtBorrowingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_LongtermDebtTypeAxis=car_InternationalDebtBorrowingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_LongtermDebtTypeAxis=car_InternationalCapitalLeasesDomain
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_LongtermDebtTypeAxis=car_OtherDebtUnderVehicleProgramMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_LongtermDebtTypeAxis=car_DebtUnderVehicleProgramsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |