Supplemental Consolidated Financial Information - Equity Method Investments and Warrants (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Balance Sheet Components [Line Items] | ||||
| Unrealized change in fair value of equity investment | $ (4) | $ (23) | $ (8) | $ (263) |
| Change in fair value of warrant | 0 | (174) | 0 | (25) |
| Change in fair value of Aurelia option | 0 | (109) | 0 | (109) |
| Loss on equity investments and warrant, net | (4) | (222) | (6) | (319) |
| Adevinta | ||||
| Balance Sheet Components [Line Items] | ||||
| Unrealized change in fair value of equity investment | 0 | 0 | 0 | (234) |
| Realized change in fair value of shares sold in Adevinta | 0 | 84 | 0 | 78 |
| Gmarket | ||||
| Balance Sheet Components [Line Items] | ||||
| Unrealized change in fair value of equity investment | 0 | (22) | 0 | (28) |
| Loss on other investments | ||||
| Balance Sheet Components [Line Items] | ||||
| Unrealized change in fair value of equity investment | $ (4) | $ (1) | $ (6) | $ (1) |