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Segment Information (Narrative) (Detail) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2018 | Mar. 31, 2017 | Dec. 31, 2017
Segment Reporting Information [Line Items] |  |  |
Document Period End Date | Mar. 31, 2018 |  |
Revenues | $ 1,968 | $ 1,839 |
Adjusted EBITDA | 2 | (27) |
Non Vehicle Related Depreciation And Amortization | 61 | 63 |
Restructuring and other related charges | 6 | 7 |
Loss before income taxes | (129) | (165) |
Assets Under Vehicle Programs | 13,256 |  | $ 11,879
Total assets exclusive of assets under vehicle programs | 5,966 |  | 5,820
Americas |  |  |
Segment Reporting Information [Line Items] |  |  |
Adjusted EBITDA | 15 | (20) |
Assets Under Vehicle Programs | 10,200 |  | 9,000
International [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 620 | 525 |
Adjusted EBITDA | 3 | 7 |
Assets Under Vehicle Programs | 3,100 |  | $ 2,900
Corporate and Other [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 0 | 0 |
Adjusted EBITDA | $ (16) | $ (14) |

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