<?xml version='1.0' encoding='UTF-8'?>
<FilingSummary>
  <Version>3.5.0.2</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>242</ContextCount>
  <ElementCount>306</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>71</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>6</UnitCount>
  <MyReports>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>0001000 - Document - Document and Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/DocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>1001000 - Statement - CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/ConsolidatedCondensedStatementsOfComprehensiveIncomeUnaudited</Role>
      <ShortName>CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>1002000 - Statement - CONSOLIDATED CONDENSED BALANCE SHEETS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/ConsolidatedCondensedBalanceSheets</Role>
      <ShortName>CONSOLIDATED CONDENSED BALANCE SHEETS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>1002501 - Statement - CONSOLIDATED CONDENSED BALANCE SHEETS (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/ConsolidatedCondensedBalanceSheetsParenthetical</Role>
      <ShortName>CONSOLIDATED CONDENSED BALANCE SHEETS (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>1003000 - Statement - CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/ConsolidatedCondensedStatementsOfCashFlows</Role>
      <ShortName>CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>2101100 - Disclosure - Basis of Presentation and Recently Issued Accounting Pronouncements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/BasisOfPresentationAndRecentlyIssuedAccountingPronouncements</Role>
      <ShortName>Basis of Presentation and Recently Issued Accounting Pronouncements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>2102100 - Disclosure - Restructuring</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/Restructuring</Role>
      <ShortName>Restructuring</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>2103100 - Disclosure - Earnings Per Share Earnings Per Share (Notes)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.avis.com/role/EarningsPerShareEarningsPerShareNotes</Role>
      <ShortName>Earnings Per Share Earnings Per Share (Notes)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>2108100 - Disclosure - Other Current Assets Other Current Assets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/OtherCurrentAssetsOtherCurrentAssets</Role>
      <ShortName>Other Current Assets Other Current Assets</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>2111100 - Disclosure - Intangible Assets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/IntangibleAssets</Role>
      <ShortName>Intangible Assets</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>2112100 - Disclosure - Vehicle Rental Activities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/VehicleRentalActivities</Role>
      <ShortName>Vehicle Rental Activities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>2115100 - Disclosure - Income Taxes Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/IncomeTaxesIncomeTaxes</Role>
      <ShortName>Income Taxes Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>2116100 - Disclosure - Long-term Debt and Borrowing Arrangements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/LongTermDebtAndBorrowingArrangements</Role>
      <ShortName>Long-term Debt and Borrowing Arrangements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>2117100 - Disclosure - Debt Under Vehicle Programs and Borrowing Arrangements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/DebtUnderVehicleProgramsAndBorrowingArrangements</Role>
      <ShortName>Debt Under Vehicle Programs and Borrowing Arrangements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>2118100 - Disclosure - Commitments and Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/CommitmentsAndContingencies</Role>
      <ShortName>Commitments and Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>2119100 - Disclosure - Stockholders' Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/StockholdersEquity</Role>
      <ShortName>Stockholders' Equity</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>2120100 - Disclosure - Stock-Based Compensation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/StockBasedCompensation</Role>
      <ShortName>Stock-Based Compensation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>2121100 - Disclosure - Financial Instruments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/FinancialInstruments</Role>
      <ShortName>Financial Instruments</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>2122100 - Disclosure - Segment Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/SegmentInformation</Role>
      <ShortName>Segment Information</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>2123100 - Disclosure - Guarantor and Non-Guarantor Consolidating Condensed Financial Statements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/GuarantorAndNonGuarantorConsolidatingCondensedFinancialStatements</Role>
      <ShortName>Guarantor and Non-Guarantor Consolidating Condensed Financial Statements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>2124100 - Disclosure - Subsequent Events (Notes)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.avis.com/role/SubsequentEventsNotes</Role>
      <ShortName>Subsequent Events (Notes)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>2201201 - Disclosure - Basis of Presentation and Recently Issued Accounting Pronouncements (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/BasisOfPresentationAndRecentlyIssuedAccountingPronouncementsPolicies</Role>
      <ShortName>Basis of Presentation and Recently Issued Accounting Pronouncements (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.avis.com/role/BasisOfPresentationAndRecentlyIssuedAccountingPronouncements</ParentRole>
      <Position>22</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>2302301 - Disclosure - Restructuring (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/RestructuringTables</Role>
      <ShortName>Restructuring (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.avis.com/role/Restructuring</ParentRole>
      <Position>23</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>2303301 - Disclosure - Earnings Per Share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/EarningsPerShareTables</Role>
      <ShortName>Earnings Per Share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.avis.com/role/EarningsPerShareEarningsPerShareNotes</ParentRole>
      <Position>24</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>2308301 - Disclosure - Other Current Assets (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/OtherCurrentAssetsTables</Role>
      <ShortName>Other Current Assets (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.avis.com/role/OtherCurrentAssetsOtherCurrentAssets</ParentRole>
      <Position>25</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>2311301 - Disclosure - Intangible Assets (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/IntangibleAssetsTables</Role>
      <ShortName>Intangible Assets (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.avis.com/role/IntangibleAssets</ParentRole>
      <Position>26</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>2312301 - Disclosure - Vehicle Rental Activities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/VehicleRentalActivitiesTables</Role>
      <ShortName>Vehicle Rental Activities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.avis.com/role/VehicleRentalActivities</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>2316301 - Disclosure - Long-term Debt and Borrowing Arrangements (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/LongTermDebtAndBorrowingArrangementsTables</Role>
      <ShortName>Long-term Debt and Borrowing Arrangements (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.avis.com/role/LongTermDebtAndBorrowingArrangements</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>2317301 - Disclosure - Debt Under Vehicle Programs and Borrowing Arrangements (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/DebtUnderVehicleProgramsAndBorrowingArrangementsTables</Role>
      <ShortName>Debt Under Vehicle Programs and Borrowing Arrangements (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.avis.com/role/DebtUnderVehicleProgramsAndBorrowingArrangements</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>2319301 - Disclosure - Stockholders' Equity (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/StockholdersEquityTables</Role>
      <ShortName>Stockholders' Equity (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.avis.com/role/StockholdersEquity</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>2320301 - Disclosure - Stock-Based Compensation (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/StockBasedCompensationTables</Role>
      <ShortName>Stock-Based Compensation (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.avis.com/role/StockBasedCompensation</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>2321301 - Disclosure - Financial Instruments (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/FinancialInstrumentsTables</Role>
      <ShortName>Financial Instruments (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.avis.com/role/FinancialInstruments</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>2322301 - Disclosure - Segment Information (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/SegmentInformationTables</Role>
      <ShortName>Segment Information (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.avis.com/role/SegmentInformation</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>2323301 - Disclosure - Guarantor and Non-Guarantor Consolidating Condensed Financial Statements (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/GuarantorAndNonGuarantorConsolidatingCondensedFinancialStatementsTables</Role>
      <ShortName>Guarantor and Non-Guarantor Consolidating Condensed Financial Statements (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.avis.com/role/GuarantorAndNonGuarantorConsolidatingCondensedFinancialStatements</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>2401402 - Disclosure - Basis Of Presentation And Recently Issued Accounting Pronouncements (Narrative) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/BasisOfPresentationAndRecentlyIssuedAccountingPronouncementsNarrativeDetail</Role>
      <ShortName>Basis Of Presentation And Recently Issued Accounting Pronouncements (Narrative) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>35</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>2402402 - Disclosure - Restructuring (Narrative) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/RestructuringNarrativeDetail</Role>
      <ShortName>Restructuring (Narrative) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.avis.com/role/RestructuringTables</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>2402403 - Disclosure - Restructuring (Summary Of Changes To Restructuring-Related Liabilities) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/RestructuringSummaryOfChangesToRestructuringRelatedLiabilitiesDetail</Role>
      <ShortName>Restructuring (Summary Of Changes To Restructuring-Related Liabilities) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.avis.com/role/RestructuringTables</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>2403402 - Disclosure - Earnings Per Share (Computation Of Basic And Diluted Earnings Per Share) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/EarningsPerShareComputationOfBasicAndDilutedEarningsPerShareDetail</Role>
      <ShortName>Earnings Per Share (Computation Of Basic And Diluted Earnings Per Share) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.avis.com/role/EarningsPerShareTables</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>2403403 - Disclosure - Earnings Per Share Earnings Per Share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/EarningsPerShareEarningsPerShareDetails</Role>
      <ShortName>Earnings Per Share Earnings Per Share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.avis.com/role/EarningsPerShareEarningsPerShareNotes</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>2408402 - Disclosure - Other Current Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/OtherCurrentAssetsDetails</Role>
      <ShortName>Other Current Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.avis.com/role/OtherCurrentAssetsTables</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>2411402 - Disclosure - Intangible Assets (Schedule Of Intangible Assets) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/IntangibleAssetsScheduleOfIntangibleAssetsDetail</Role>
      <ShortName>Intangible Assets (Schedule Of Intangible Assets) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.avis.com/role/IntangibleAssetsTables</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>2411403 - Disclosure - Intangible Assets (Narrative) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/IntangibleAssetsNarrativeDetail</Role>
      <ShortName>Intangible Assets (Narrative) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.avis.com/role/IntangibleAssetsTables</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>2412402 - Disclosure - Vehicle Rental Activities (Components Of The Company's Vehicles) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/VehicleRentalActivitiesComponentsOfCompanysVehiclesDetail</Role>
      <ShortName>Vehicle Rental Activities (Components Of The Company's Vehicles) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.avis.com/role/VehicleRentalActivitiesTables</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>2412403 - Disclosure - Vehicle Rental Activities (Components Of Vehicle Depreciation And Lease Charges) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/VehicleRentalActivitiesComponentsOfVehicleDepreciationAndLeaseChargesDetail</Role>
      <ShortName>Vehicle Rental Activities (Components Of Vehicle Depreciation And Lease Charges) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.avis.com/role/VehicleRentalActivitiesTables</ParentRole>
      <Position>44</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>2415401 - Disclosure - Income Taxes Income Taxes (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/IncomeTaxesIncomeTaxesNarrativeDetails</Role>
      <ShortName>Income Taxes Income Taxes (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.avis.com/role/IncomeTaxesIncomeTaxes</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>2416402 - Disclosure - Long-Term Debt And Borrowing Arrangements (Schedule Of Long-Term Debt) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/LongTermDebtAndBorrowingArrangementsScheduleOfLongTermDebtDetail</Role>
      <ShortName>Long-Term Debt And Borrowing Arrangements (Schedule Of Long-Term Debt) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>46</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>2416403 - Disclosure - Long-Term Debt And Borrowing Arrangements (Schedule Of Long-Term Debt) (Detail Section)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/LongTermDebtAndBorrowingArrangementsScheduleOfLongTermDebtDetailSection</Role>
      <ShortName>Long-Term Debt And Borrowing Arrangements (Schedule Of Long-Term Debt) (Detail Section)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>47</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>2416404 - Disclosure - Long-Term Debt And Borrowing Arrangements (Narrative) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/LongTermDebtAndBorrowingArrangementsNarrativeDetail</Role>
      <ShortName>Long-Term Debt And Borrowing Arrangements (Narrative) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>48</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>2416405 - Disclosure - Long-Term Debt And Borrowing Arrangements (Schedule Of Committed Credit Facilities) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/LongTermDebtAndBorrowingArrangementsScheduleOfCommittedCreditFacilitiesDetail</Role>
      <ShortName>Long-Term Debt And Borrowing Arrangements (Schedule Of Committed Credit Facilities) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>49</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>2416406 - Disclosure - Long-Term Debt And Borrowing Arrangements (Schedule Of Committed Credit Facilities) (Detail Section)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/LongTermDebtAndBorrowingArrangementsScheduleOfCommittedCreditFacilitiesDetailSection</Role>
      <ShortName>Long-Term Debt And Borrowing Arrangements (Schedule Of Committed Credit Facilities) (Detail Section)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>50</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>2417402 - Disclosure - Debt Under Vehicle Programs And Borrowing Arrangements (Schedule Of Debt Under Vehicle Programs) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/DebtUnderVehicleProgramsAndBorrowingArrangementsScheduleOfDebtUnderVehicleProgramsDetail</Role>
      <ShortName>Debt Under Vehicle Programs And Borrowing Arrangements (Schedule Of Debt Under Vehicle Programs) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>51</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>2417403 - Disclosure - Debt Under Vehicle Programs And Borrowing Arrangements (Schedule Of Contractual Maturities) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/DebtUnderVehicleProgramsAndBorrowingArrangementsScheduleOfContractualMaturitiesDetail</Role>
      <ShortName>Debt Under Vehicle Programs And Borrowing Arrangements (Schedule Of Contractual Maturities) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>52</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>2417404 - Disclosure - Debt Under Vehicle Programs And Borrowing Arrangements (Schedule Of Available Funding Under The Vehicle Programs) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/DebtUnderVehicleProgramsAndBorrowingArrangementsScheduleOfAvailableFundingUnderVehicleProgramsDetail</Role>
      <ShortName>Debt Under Vehicle Programs And Borrowing Arrangements (Schedule Of Available Funding Under The Vehicle Programs) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>53</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>2417405 - Disclosure - Debt Under Vehicle Programs and Borrowing Arrangements Debt Under Vehicle Programs and Borrowing Arrangements (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/DebtUnderVehicleProgramsAndBorrowingArrangementsDebtUnderVehicleProgramsAndBorrowingArrangementsDetails</Role>
      <ShortName>Debt Under Vehicle Programs and Borrowing Arrangements Debt Under Vehicle Programs and Borrowing Arrangements (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>54</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>2418401 - Disclosure - Commitments And Contingencies (Narrative) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/CommitmentsAndContingenciesNarrativeDetail</Role>
      <ShortName>Commitments And Contingencies (Narrative) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>55</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>2419402 - Disclosure - Stockholders' Equity (Narrative) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/StockholdersEquityNarrativeDetail</Role>
      <ShortName>Stockholders' Equity (Narrative) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.avis.com/role/StockholdersEquityTables</ParentRole>
      <Position>56</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>2419403 - Disclosure - Stockholders' Equity (Accumulated Other Comprehensive Income) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/StockholdersEquityAccumulatedOtherComprehensiveIncomeDetail</Role>
      <ShortName>Stockholders' Equity (Accumulated Other Comprehensive Income) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.avis.com/role/StockholdersEquityTables</ParentRole>
      <Position>57</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>2419404 - Disclosure - Stockholders' Equity (Components Of Other Comprehensive Income) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/StockholdersEquityComponentsOfOtherComprehensiveIncomeDetail</Role>
      <ShortName>Stockholders' Equity (Components Of Other Comprehensive Income) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.avis.com/role/StockholdersEquityTables</ParentRole>
      <Position>58</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>2420402 - Disclosure - Stock-Based Compensation (Narrative) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/StockBasedCompensationNarrativeDetail</Role>
      <ShortName>Stock-Based Compensation (Narrative) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.avis.com/role/StockBasedCompensationTables</ParentRole>
      <Position>59</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>2420403 - Disclosure - Stock-Based Compensation (Summary Of Share Based Payment Other Than Options Valuation Assumptions) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/StockBasedCompensationSummaryOfShareBasedPaymentOtherThanOptionsValuationAssumptionsDetail</Role>
      <ShortName>Stock-Based Compensation (Summary Of Share Based Payment Other Than Options Valuation Assumptions) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.avis.com/role/StockBasedCompensationTables</ParentRole>
      <Position>60</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>2420404 - Disclosure - Stock-Based Compensation (Stock Based Compensation Activity) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/StockBasedCompensationStockBasedCompensationActivityDetail</Role>
      <ShortName>Stock-Based Compensation (Stock Based Compensation Activity) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.avis.com/role/StockBasedCompensationTables</ParentRole>
      <Position>61</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>2420405 - Disclosure - Stock-Based Compensation (Summary Of Share Based Compensation Shares Authorized Under Stock Option Plans By Exercise Price Range) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/StockBasedCompensationSummaryOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeDetail</Role>
      <ShortName>Stock-Based Compensation (Summary Of Share Based Compensation Shares Authorized Under Stock Option Plans By Exercise Price Range) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.avis.com/role/StockBasedCompensationTables</ParentRole>
      <Position>62</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>2421402 - Disclosure - Financial Instruments (Schedule Of Carrying Amounts And Estimated Fair Values) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/FinancialInstrumentsScheduleOfCarryingAmountsAndEstimatedFairValuesDetail</Role>
      <ShortName>Financial Instruments (Schedule Of Carrying Amounts And Estimated Fair Values) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.avis.com/role/FinancialInstrumentsTables</ParentRole>
      <Position>63</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>2421403 - Disclosure - Financial Instruments (Narrative) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/FinancialInstrumentsNarrativeDetail</Role>
      <ShortName>Financial Instruments (Narrative) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.avis.com/role/FinancialInstrumentsTables</ParentRole>
      <Position>64</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>2421404 - Disclosure - Financial Instruments (Fair Values Of Derivatives Instruments) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/FinancialInstrumentsFairValuesOfDerivativesInstrumentsDetail</Role>
      <ShortName>Financial Instruments (Fair Values Of Derivatives Instruments) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.avis.com/role/FinancialInstrumentsTables</ParentRole>
      <Position>65</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>2421405 - Disclosure - Financial Instruments (Schedule Of Effect Of Derivatives Recognized) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/FinancialInstrumentsScheduleOfEffectOfDerivativesRecognizedDetail</Role>
      <ShortName>Financial Instruments (Schedule Of Effect Of Derivatives Recognized) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.avis.com/role/FinancialInstrumentsTables</ParentRole>
      <Position>66</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>2422402 - Disclosure - Segment Information (Summary Of Segments Information) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/SegmentInformationSummaryOfSegmentsInformationDetail</Role>
      <ShortName>Segment Information (Summary Of Segments Information) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.avis.com/role/SegmentInformationTables</ParentRole>
      <Position>67</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>2422403 - Disclosure - Segment Information (Narrative) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/SegmentInformationNarrativeDetail</Role>
      <ShortName>Segment Information (Narrative) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.avis.com/role/SegmentInformationTables</ParentRole>
      <Position>68</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>2423402 - Disclosure - Guarantor And Non-Guarantor Consolidating Condensed Financial Statements (Consolidating Condensed Statements Of Comprehensive Income) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/GuarantorAndNonGuarantorConsolidatingCondensedFinancialStatementsConsolidatingCondensedStatementsOfComprehensiveIncomeDetail</Role>
      <ShortName>Guarantor And Non-Guarantor Consolidating Condensed Financial Statements (Consolidating Condensed Statements Of Comprehensive Income) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>69</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>2423403 - Disclosure - Guarantor And Non-Guarantor Consolidating Condensed Financial Statements (Consolidating Condensed Balance Sheets) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/GuarantorAndNonGuarantorConsolidatingCondensedFinancialStatementsConsolidatingCondensedBalanceSheetsDetail</Role>
      <ShortName>Guarantor And Non-Guarantor Consolidating Condensed Financial Statements (Consolidating Condensed Balance Sheets) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>70</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>2423404 - Disclosure - Guarantor And Non-Guarantor Consolidating Condensed Financial Statements (Consolidating Condensed Statements Of Cash Flows) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/GuarantorAndNonGuarantorConsolidatingCondensedFinancialStatementsConsolidatingCondensedStatementsOfCashFlowsDetail</Role>
      <ShortName>Guarantor And Non-Guarantor Consolidating Condensed Financial Statements (Consolidating Condensed Statements Of Cash Flows) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>71</Position>
    </Report>
    <Report instance="car-20160930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>2424402 - Disclosure - Subsequent Events (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.avis.com/role/SubsequentEventsDetails</Role>
      <ShortName>Subsequent Events (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.avis.com/role/SubsequentEventsNotes</ParentRole>
      <Position>72</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>car-20160930.xml</File>
    <File>car-20160930.xsd</File>
    <File>car-20160930_cal.xml</File>
    <File>car-20160930_def.xml</File>
    <File>car-20160930_lab.xml</File>
    <File>car-20160930_pre.xml</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies/>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
