Vehicle Rental Activities - Schedule of Components of Vehicle Depreciation and Lease Charges (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Property, Plant, and Equipment [Abstract] | ||||
| Depreciation expense | $ 623 | $ 657 | $ 1,273 | $ 1,350 |
| Lease charges | 28 | 33 | 52 | 61 |
| (Gain) loss on sale of vehicles, net | (68) | (54) | (78) | 280 |
| Vehicle depreciation and lease charges, net | $ 583 | $ 636 | $ 1,247 | 1,691 |
| Other fleet charges | $ 390 | |||