Vehicle Rental Activities ( Schedule of Components of Vehicle Depreciation and Lease Charges) (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2025 |
Sep. 30, 2024 |
Sep. 30, 2025 |
Sep. 30, 2024 |
|
| Property, Plant and Equipment [Abstract] | ||||
| Depreciation expense | $ 675 | $ 723 | $ 2,025 | $ 1,940 |
| Lease charges | 34 | 41 | 95 | 115 |
| (Gain) loss on sale of vehicles, net | (31) | 42 | 249 | 120 |
| Vehicle depreciation and lease charges, net | $ 678 | $ 806 | 2,369 | $ 2,175 |
| Other fleet charges | $ 390 | |||