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Segment Information - Summary of Segment Assets (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Reportable segment Adjusted EBITDA | $ 202 | $ 273 | $ 246
Assets exclusive of assets under vehicle programs | 9,668 | 9,590 | 8,499
Assets under vehicle programs | 19,373 | 22,979 | 17,428
Net long-lived assets | 2,369 | 2,488 | 2,330
Americas |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Reportable segment Adjusted EBITDA | 109 | 126 | 117
Assets exclusive of assets under vehicle programs | 6,785 | 6,533 | 5,798
Assets under vehicle programs | 16,058 | 19,285 | 14,269
Net long-lived assets | 1,474 | 1,483 | 1,446
International |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Reportable segment Adjusted EBITDA | 40 | 44 | 33
Assets exclusive of assets under vehicle programs | 2,539 | 2,633 | 2,402
Assets under vehicle programs | 3,315 | 3,694 | 3,159
Net long-lived assets | 733 | 795 | 761
Unallocated Assets (a) |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Reportable segment Adjusted EBITDA | 53 | 103 | 96
Assets exclusive of assets under vehicle programs | 344 | 424 | 299
Assets under vehicle programs | 0 | 0 | 0
Net long-lived assets | $ 162 | $ 210 | $ 123

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- Definition Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 41 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-41 + Details
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