Revenue Earning Vehicles - Schedule of Depreciation of Revenue Earning Vehicles and Lease Charges (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
|
| Long-Lived Assets Held-for-sale [Line Items] | ||||
| Depreciation of revenue earning vehicles | $ 410 | $ 420 | $ 1,299 | $ 1,317 |
| (Gain) loss on disposal of revenue earning vehicles | 19 | 4 | 47 | 25 |
| Rents paid for vehicles leased | 39 | 33 | 90 | 65 |
| Depreciation of revenue earning vehicles and lease charges, net | 468 | 457 | 1,436 | 1,407 |
| Disposed of by Sale | ||||
| Long-Lived Assets Held-for-sale [Line Items] | ||||
| (Gain) loss on disposal of revenue earning vehicles | $ 38 | $ 49 | $ 140 | $ 203 |