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Schedule Of Carrying Amounts And Estimated Fair Values (Detail) - USD ($) $ in Millions | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Debt Instrument [Line Items] |  |
Short-term debt and current portion of long-term debt | $ 26 | $ 279
Reported Value Measurement [Member] |  |
Debt Instrument [Line Items] |  |
Short-term debt and current portion of long-term debt | 26 | 279
Long-term debt, excluding convertible debt | 3,573 | 3,244
Debt under vehicle programs Vehicle-backed debt due to Avis Budget Rental Car Funding | 6,480 | 6,695
Vehicle-backed debt | 2,740 | 2,176
Interest rate swaps and interest rate contracts | 1 | 7
Estimate of Fair Value Measurement [Member] |  |
Debt Instrument [Line Items] |  |
Short-term debt and current portion of long-term debt | 26 | 280
Long-term debt, excluding convertible debt | 3,677 | 3,265
Debt under vehicle programs Vehicle-backed debt due to Avis Budget Rental Car Funding | 6,537 | 6,722
Vehicle-backed debt | 2,745 | 2,187
Interest rate swaps and interest rate contracts | $ 1 | $ 7

X
- Definition Carrying amount as of the balance sheet date of obligations due to Avis Budget Rental Car Funding (AESOP) LLC- a related party, for rental vehicles. + References No definition available. + Details
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- Definition Debt under vehicle programs, interest rate swaps and interest rate contracts. + References No definition available. + Details
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X
- Definition Fair value information on non-current portion of long-term debt, excluding convertible debt. + References No definition available. + Details
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X
- Definition Carrying value as of the balance sheet date of debt related to rental vehicles due to third party lenders. + References No definition available. + Details
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Namespace Prefix: | car_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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X
- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + 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 210.5-02.19,20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Details
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- Details
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