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Segment Information - Summary of Segments Information (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Segment Reporting Information [Line Items] |  |  |
Revenues | $ 11,789 | $ 12,008 | $ 11,994
Significant segment expenses: |  |  |
Operating | 6,014 | 5,675 | 5,285
Vehicle depreciation and lease charges, net | 2,976 | 1,739 | 828
Selling, general and administrative | 1,352 | 1,408 | 1,348
Vehicle interest, net | 941 | 736 | 402
Reconciliation of reportable segment Adjusted EBITDA to income (loss) before income taxes: |  |  |
Non-vehicle related depreciation and amortization | 237 | 216 | 225
Long-lived asset impairment and other related charges | 2,470 | 0 | 0
Restructuring and other related charges | 37 | 11 | 19
Transaction-related costs, net | 3 | 5 | 8
Other (income) expense, net | 9 | 3 | (7)
Income (loss) before income taxes | (2,627) | 1,914 | 3,636
Non-cash impairment | 2,300 | 0 | 0
Impairment, long-lived asset, held-for-use | 180 | 0 | 0
Interest expense | 358 | 296 | 250
Early extinguishment of debt | (19) | (5) | 0
Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 11,789 | 12,008 |
Significant segment expenses: |  |  |
Reportable segment Adjusted EBITDA | 712 | 2,596 | 4,220
Reconciliation of reportable segment Adjusted EBITDA to income (loss) before income taxes: |  |  |
Non-vehicle related depreciation and amortization | 234 | 215 | 207
Interest expense related to corporate debt, net | 4 | (6) | 3
Long-lived asset impairment and other related charges | 2,470 |  |
Restructuring and other related charges | 37 | 11 | 18
Transaction-related costs, net | 3 | 3 | 8
Other (income) expense, net | 9 | 3 | (7)
Legal matters, net; cloud computing costs; and severe weather-related damages, net | 77 | 10 | (3)
Segment Reporting, Reconciling Item, Corporate Nonsegment |  |  |
Reconciliation of reportable segment Adjusted EBITDA to income (loss) before income taxes: |  |  |
Corporate and other | 505 | 446 | 358
Interest expense | 354 | 302 | 247
Early extinguishment of debt | 19 | 5 |
Americas |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues |  |  | 9,474
Americas | Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 9,111 | 9,347 |
Significant segment expenses: |  |  |
Operating | 4,604 | 4,425 | 4,150
Vehicle depreciation and lease charges, net | 2,301 | 1,215 | 414
Selling, general and administrative | 868 | 894 | 902
Vehicle interest, net | 787 | 617 | 348
Reportable segment Adjusted EBITDA | 551 | 2,196 | 3,660
International |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues |  |  | 2,520
International | Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 2,678 | 2,661 |
Significant segment expenses: |  |  |
Operating | 1,279 | 1,209 | 1,114
Vehicle depreciation and lease charges, net | 675 | 524 | 414
Selling, general and administrative | 409 | 409 | 378
Vehicle interest, net | 154 | 119 | 54
Reportable segment Adjusted EBITDA | $ 161 | $ 400 | $ 560

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