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Segment Information (Narrative) (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016 | Dec. 31, 2016
Segment Reporting Information [Line Items] |  |  |  |  |
Document Period End Date |  |  | Jun. 30, 2017 |  |
Revenues | $ 2,238 | $ 2,243 | $ 4,077 | $ 4,124 |
Adjusted EBITDA | 140 | 204 | 113 | 248 |
Non Vehicle Related Depreciation And Amortization | 65 | 65 | 128 | 126 |
Restructuring and other related charges | 38 | 5 | 45 | 20 |
Income (loss) before income taxes | 11 | 63 | (154) | (23) |
Assets Under Vehicle Programs | 14,019 |  | 14,019 |  | $ 11,578
Total assets exclusive of assets under vehicle programs | 6,813 |  | 6,813 |  | 6,065
International |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues | 673 | 650 | 1,198 | 1,167 |
Adjusted EBITDA | 59 | 57 | 66 | 58 |
Assets Under Vehicle Programs | 3,300 |  | 3,300 |  | 2,400
Total assets exclusive of assets under vehicle programs | 2,600 |  | 2,600 |  | 2,000
International |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues | 1,565 | 1,593 | 2,879 | 2,957 |
Adjusted EBITDA | 96 | 163 | 76 | 226 |
Assets Under Vehicle Programs | 10,600 |  | 10,600 |  | $ 9,200
Corporate and Other [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues | 0 | 0 | 0 | 0 |
Adjusted EBITDA | $ (15) | $ (16) | $ (29) | $ (36) |

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