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Revenues (Details) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2018 | Mar. 31, 2017
Revenues [Abstract] |  |
Deferred Revenue Rollforward [Table Text Block] | The following table presents changes in the Company’s deferred revenue balances during the three months ended March 31, 2018.
| Balance at January 1, 2018 |  | Revenue deferred |  | Revenue recognized |  | Balance at March 31, 2018
Prepaid rentals(a) | $ | 101 |  |  | $ | 367 |  |  | $ | 313 |  |  | $ | 155 |
Other deferred revenue(b) | 93 |  |  | 52 |  |  | 50 |  |  | 95 |
Total deferred revenue | $ | 194 |  |  | $ | 419 |  |  | $ | 363 |  |  | $ | 250 |
________
(a) | At March 31, 2018, included in accounts payable and other current liabilities.
(b) | At March 31, 2018, $39 million included in accounts payable and other current liabilities and $56 million in other non-current liabilities. Non-current amounts are expected to be recognized as revenue within two to three years.
Disaggregation of Revenue by Geography [Table Text Block] | The following table presents the Company’s revenues disaggregated by geography.
|  | Three Months Ended March 31, 2018
Americas | $ | 1,348 |
Europe, Middle East and Africa | 447 |
Asia and Australasia | 173 |
Total revenues | $ | 1,968 |
Disaggregation of Revenue by Brand [Table Text Block] | The following table presents the Company’s revenues disaggregated by brand.
|  | Three Months Ended March 31, 2018
Avis | $ | 1,145 |
Budget | 642 |
Other | 181 |
Total revenues | $ | 1,968 |
________ Other includes Zipcar, Payless, Apex, Maggiore and FranceCars. |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Revenues | $ 1,968 | $ 1,839
Budget |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Revenues | 642 |
Avis |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Revenues | 1,145 |
Other |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Revenues | 181 |
Americas |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Revenues | 1,348 | $ 1,314
Europe, Middle East and Africa |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Revenues | 447 |
Asia and Australasia |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Revenues | $ 173 |

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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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