Vehicle Rental Activities ( Schedule of Components of the Company's Vehicles) (Details) - USD ($) $ in Millions |
Sep. 30, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Property, Plant and Equipment [Abstract] | ||
| Rental vehicles | $ 22,020 | $ 20,094 |
| Less: Accumulated depreciation | (2,928) | (3,143) |
| Rental vehicles net, total | 19,092 | 16,951 |
| Vehicles held for sale | 448 | 594 |
| Vehicle, net investment in lease | 100 | 74 |
| Vehicles, net | $ 19,640 | $ 17,619 |