Long-Term Debt And Borrowing Arrangements (Schedule Of Long-Term Debt) (Parenthetical) (Detail) (USD $)	3 Months Ended
Mar. 31, 2015
Floating Rate Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Description of Variable Rate Basis	275 basis points
Debt Instrument, Basis Spread on Variable Rate	3.58%
Floating Rate Term Loan Due March Two Thousand Nineteen [Member]
Debt Instrument [Line Items]
Debt Instrument, Description of Variable Rate Basis	225 basis points
Floating Rate Term Loan Due March Two Thousand Nineteen [Member]
Debt Instrument [Line Items]
Debt Instrument, Description of Variable Rate Basis	225 basis points
Percentage Of Margin Aggregate Interest Rate	3.00%
Debt Instrument, Basis Spread on Variable Rate	3.96%
Floating rate	0.75%
Long Term Borrowings [Member] \| Five And One Over Four Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	5.25%
Long Term Borrowings [Member] \| Five and One over Eight Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	5.125%
Long Term Borrowings [Member] \| 8 1/4% Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	8.25%
Senior Notes [Member] \| Floating Rate Senior Notes Due December 2017 [Member]
Debt Instrument [Line Items]
Percentage Of Margin Aggregate Interest Rate	3.01%
Loans Payable [Member] \| Floating Rate Term Loan Due March Two Thousand Nineteen [Member]
Debt Instrument [Line Items]
Derivative, Amount of Hedged Item	600,000,000
Minimum [Member] \| Bank Overdraft [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Interest Rate During Period	2.95%
Maximum [Member] \| Bank Overdraft [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Interest Rate During Period	5.69%

Debt Instrument, Floating Rate, Floor

No definition available.

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Namespace Prefix:	car_
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Balance Type:	na
Period Type:	duration

- Definition

Percentage Of Margin Aggregate Interest Rate.

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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- Definition

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

+ Details

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

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 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Period Type:	instant

- Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of the hedged item as of the balance sheet date related to the derivative. For example, the hedged balance on a debt instrument.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

The effective interest rate during the reporting period.

+ 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 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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