Investments and Fair Value Measurement - Fair Value of Unobservable Inputs (Details) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Non-marketable Equity Securities | ||
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | ||
| Beginning balance | $ 11 | $ 0 |
| Change in fair value | ||
| Included in earnings | 58 | 11 |
| Ending balance | 69 | 11 |
| Notes Receivable | ||
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | ||
| Beginning balance | 144 | 126 |
| Change in fair value | ||
| Included in earnings | 46 | 18 |
| Ending balance | $ 190 | $ 144 |