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Accounts Payable and Other Current Liabilities | 6 Months Ended
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Jun. 30, 2018
Accounts Payable and Other Current Liabilities [Abstract] |
Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block] | Accounts Payable and Other Current Liabilities Accounts payable and other current liabilities consisted of:
| As of |  | As of
| June 30, |  | December 31,
| 2018 |  | 2017
Accounts payable | $ | 412 |  |  | $ | 359 |
Accrued sales and use taxes | 262 |  |  | 218 |
Deferred revenue – current | 247 |  |  | 135 |
Accrued advertising and marketing | 197 |  |  | 190 |
Accrued payroll and related | 176 |  |  | 176 |
Public liability and property damage insurance liabilities – current | 144 |  |  | 145 |
Accrued insurance | 102 |  |  | 103 |
Other | 292 |  |  | 293 |
Accounts payable and other current liabilities | $ | 1,832 |  |  | $ | 1,619 |

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- Definition Accounts Payable and Other Current Liabilities [Abstract] + References No definition available. + Details
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Namespace Prefix: | car_
Data Type: | xbrli:stringItemType
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- Definition The entire disclosure for accounts payable, accrued expenses, and other liabilities that are classified as current at the end of the reporting period. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration