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Debt Under Vehicle Programs And Borrowing Arrangements (Schedule Of Available Funding Under The Vehicle Programs) (Detail) $ in Millions | Sep. 30, 2018 USD ($)
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Debt Under Vehicle Programs And Borrowing Arrangements [Line Items] |
Total Capacity (a) | $ 12,909
Outstanding Borrowings (b) | 10,970
Available Capacity | 1,939
Debt Due To Avis Budget Rental Car Funding (Member) |
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items] |
Total Capacity (a) | 8,629
Outstanding Borrowings (b) | 7,154
Available Capacity | 1,475
Leasing Vehicles And Related Assets Pledged As Collateralized Debt | 8,700
Americas Debt Borrowings [Member] |
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items] |
Total Capacity (a) | 978
Outstanding Borrowings (b) | 855
Available Capacity | 123
Leasing Vehicles And Related Assets Pledged As Collateralized Debt | 1,200
International Debt Borrowings [Domain] |
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items] |
Total Capacity (a) | 3,072
Outstanding Borrowings (b) | 2,753
Available Capacity | 319
Leasing Vehicles And Related Assets Pledged As Collateralized Debt | 3,000
International Capital Leases [Domain] |
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items] |
Total Capacity (a) | 223
Outstanding Borrowings (b) | 201
Available Capacity | 22
Leasing Vehicles And Related Assets Pledged As Collateralized Debt | 200
Other (Member) |
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items] |
Total Capacity (a) | 7
Outstanding Borrowings (b) | 7
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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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: |