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Leases - Lessor (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Disaggregation of Revenue [Line Items] |  |  |
Total lease revenues | $ 11,821 | $ 11,829 | $ 9,186
Operating Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration] | Revenues | Revenues | Revenues
Avis |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total lease revenues | $ 6,660 | $ 6,420 | $ 4,828
Budget |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total lease revenues | 4,425 | 4,650 | 3,674
Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total lease revenues | 736 | 759 | 684
Americas |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total lease revenues | 9,261 | 9,401 | 7,501
Europe, Middle East and Africa |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total lease revenues | 1,932 | 1,852 | 1,343
Asia and Australasia |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total lease revenues | $ 628 | $ 576 | $ 342

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