Revenue Earning Vehicles - Schedule of Depreciation of Revenue Earning Vehicles 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 |
|
| Long-Lived Assets Held-for-sale [Line Items] | ||||
| Depreciation of revenue earning vehicles | $ 453 | $ 431 | $ 889 | $ 897 |
| (Gain) loss on disposal of revenue earning vehicles | 5 | (38) | 28 | 21 |
| Rents paid for vehicles leased | 29 | 22 | 51 | 32 |
| Depreciation of revenue earning vehicles and lease charges, net | 487 | 415 | 968 | 950 |
| Disposed of by Sale | ||||
| Long-Lived Assets Held-for-sale [Line Items] | ||||
| (Gain) loss on disposal of revenue earning vehicles | $ 50 | $ 72 | $ 102 | $ 154 |