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Vehicle Rental Activities (Components Of The Company's Vehicles) (Detail) - USD ($) $ in Millions | Jun. 30, 2016 | Dec. 31, 2015
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Vehicle Rental Activities [Abstract] |  |
Rental vehicles | $ 14,284 | $ 11,195
Less: Accumulated depreciation | (1,429) | (1,500)
Rental Vehicles Net, Total | 12,855 | 9,695
Vehicles held for sale | 372 | 963
Vehicles, net | 13,227 | 10,658
Accounts Payable, Other, Current | 557 | 577
Other Receivables | $ 251 | $ 217

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- Definition Accumulated depreciation recorded through the balance sheet date for vehicles involved in rental activities. + References No definition available. + Details
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Balance Type: | credit
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- Definition The cost of vehicles used in rental activities. + References No definition available. + Details
Name: | car_RentalVehicles
Namespace Prefix: | car_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Rental Vehicles Net + References No definition available. + Details
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Namespace Prefix: | car_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Vehicle Rental Activities [Abstract] + References No definition available. + Details
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- Definition The recorded value of rental vehicles held for sale, net of accumulated depreciation. + References No definition available. + Details
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Namespace Prefix: | car_
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Balance Type: | debit
Period Type: | instant

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- Definition Total carrying value of rental vehicles classified as program assets not otherwise defined in the taxonomy. + References No definition available. + Details
Name: | car_VehiclesNet
Namespace Prefix: | car_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Carrying value as of the balance sheet date of obligations incurred and payable, which are not elsewhere specified in the taxonomy. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6935-107765 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 210.5-02.19(a)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Current Liabilities -URI http://asc.fasb.org/extlink&oid=6509677 + Details
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- Definition Carrying amounts due as of the balance sheet date from parties or arising from transactions not otherwise specified in the taxonomy. + 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 210.5-02.8) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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