Fair Value Measurement of Assets and Liabilities - Quantitative Information About Level 3 Warrants, Significant Inputs (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | 12 Months Ended | |
|---|---|---|---|---|
Dec. 31, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
Dec. 31, 2024 |
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | ||||
| Fair value of shares sold | $ 0 | $ (2,417) | ||
| Gmarket | ||||
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | ||||
| Opening balance at January 1, 2024 | $ 0 | $ 335 | $ 335 | |
| Change in fair value | (12) | |||
| Fair value of shares sold | $ (322) | (323) | ||
| Closing balance at December 31, 2024 | $ 0 | $ 0 | ||