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Debt Under Vehicle Programs And Borrowing Arrangements (Schedule Of Available Funding Under The Vehicle Programs) (Detail) $ in Millions | Mar. 31, 2018 USD ($)
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Debt Under Vehicle Programs And Borrowing Arrangements [Line Items] |
Total Capacity (a) | $ 13,050
Outstanding Borrowings (b) | 10,421
Available Capacity | 2,629
Debt Due To Avis Budget Rental Car Funding (Member) |
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items] |
Total Capacity (a) | 8,887
Outstanding Borrowings (b) | 7,787
Available Capacity | 1,100
Leasing Vehicles And Related Assets Pledged As Collateralized Debt | 9,200
Americas Debt Borrowings [Member] |
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items] |
Total Capacity (a) | 901
Outstanding Borrowings (b) | 646
Available Capacity | 255
Leasing Vehicles And Related Assets Pledged As Collateralized Debt | 1,000
International Debt Borrowings [Domain] |
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items] |
Total Capacity (a) | 3,043
Outstanding Borrowings (b) | 1,798
Available Capacity | 1,245
Leasing Vehicles And Related Assets Pledged As Collateralized Debt | 2,300
International Capital Leases [Domain] |
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items] |
Total Capacity (a) | 215
Outstanding Borrowings (b) | 186
Available Capacity | 29
Leasing Vehicles And Related Assets Pledged As Collateralized Debt | 200
Other (Member) |
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items] |
Total Capacity (a) | 4
Outstanding Borrowings (b) | 4
Available Capacity | $ 0

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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 borrowed under the vehicle program as of the balance sheet date. + References No definition available. + Details
Name: | car_VehicleProgramDebtAmountOutstanding
Namespace Prefix: | car_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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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- 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_InternationalDebtBorrowingsDomain
Namespace Prefix: |
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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: |