Leases (Schedule of Revenues Disaggregated by Geography) (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2025 |
Sep. 30, 2024 |
Sep. 30, 2025 |
Sep. 30, 2024 |
|
| Lessor, Lease, Description [Line Items] | ||||
| Total lease revenues | $ 3,458 | $ 3,392 | $ 8,832 | $ 8,895 |
| Avis | ||||
| Lessor, Lease, Description [Line Items] | ||||
| Total lease revenues | 1,961 | 1,953 | 4,993 | 5,097 |
| Budget | ||||
| Lessor, Lease, Description [Line Items] | ||||
| Total lease revenues | 1,312 | 1,247 | 3,306 | 3,261 |
| Other | ||||
| Lessor, Lease, Description [Line Items] | ||||
| Total lease revenues | 185 | 192 | 533 | 537 |
| Americas | ||||
| Lessor, Lease, Description [Line Items] | ||||
| Total lease revenues | 2,597 | 2,587 | 6,790 | 6,891 |
| Europe, Middle East and Africa | ||||
| Lessor, Lease, Description [Line Items] | ||||
| Total lease revenues | 710 | 660 | 1,595 | 1,548 |
| Asia and Australasia | ||||
| Lessor, Lease, Description [Line Items] | ||||
| Total lease revenues | $ 151 | $ 145 | $ 447 | $ 456 |