Investments and Fair Value Measurement - Schedule of Change in Equity Securities (Details) - USD ($) $ in Millions |
Mar. 31, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Fair Value Disclosures [Abstract] | ||
| Initial cost basis | $ 3,009 | $ 2,673 |
| Upward adjustments | 3,755 | 3,726 |
| Downward adjustments (including impairment) | (2,677) | (2,002) |
| Total carrying value at the end of the period | $ 4,087 | $ 4,397 |