Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]

No definition available.

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Namespace Prefix:	car_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- 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

- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(2))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentMaturityDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Weighted average interest rate of debt outstanding.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28555-108399

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.17)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

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

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

Name:	us-gaap_LongtermDebtTypeAxis=car_OtherDebtUnderVehicleProgramMember
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- Details

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Schedule Of Debt Under Vehicle Programs (Detail) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2016	Jun. 30, 2016	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2015
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Debt under vehicle programs	$ 8,878				$ 8,860
Debt Due To Rental Car Funding [Member]
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Debt Instrument, Maturity Date	Nov. 01, 2021	Jun. 01, 2021	Dec. 01, 2020	Jul. 01, 2020
Debt under vehicle programs	$ 6,733				6,837
Deferred Finance Costs, Net	$ (38)				$ (41)
Americas Debt Borrowings [Member]
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Debt, Weighted Average Interest Rate	4.00%				3.00%
Debt under vehicle programs	$ 577				$ 643
International Debt Borrowings
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Debt, Weighted Average Interest Rate	2.00%				3.00%
Debt under vehicle programs	$ 1,449				$ 1,187
International Capital Leases
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Debt under vehicle programs	162				238
Other
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Debt under vehicle programs	7				8
Debt Under Vehicle Programs [Member]
Debt Under Vehicle Programs And Borrowing Arrangements [Line Items]
Debt under vehicle programs	8,928
Deferred Finance Costs, Net	$ (50)				$ (53)