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Leases (Schedule of Revenues Disaggregated by Geography) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Lessor, Lease, Description [Line Items] |  |  |  |
Total lease revenues | $ 2,989 | $ 2,994 | $ 5,374 | $ 5,503
Avis |  |  |  |
Lessor, Lease, Description [Line Items] |  |  |  |
Total lease revenues | 1,687 | 1,710 | 3,032 | 3,144
Budget |  |  |  |
Lessor, Lease, Description [Line Items] |  |  |  |
Total lease revenues | 1,120 | 1,105 | 1,994 | 2,014
Other |  |  |  |
Lessor, Lease, Description [Line Items] |  |  |  |
Total lease revenues | 182 | 179 | 348 | 345
Americas |  |  |  |
Lessor, Lease, Description [Line Items] |  |  |  |
Total lease revenues | 2,308 | 2,330 | 4,193 | 4,304
Europe, Middle East and Africa |  |  |  |
Lessor, Lease, Description [Line Items] |  |  |  |
Total lease revenues | 543 | 524 | 885 | 888
Asia and Australasia |  |  |  |
Lessor, Lease, Description [Line Items] |  |  |  |
Total lease revenues | $ 138 | $ 140 | $ 296 | $ 311

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