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Non-Marketable Equity Investments - Summary of Non-Marketable Equity Securities Measured Using Measurement Alternative (Details) - USD ($) $ in Millions | Jun. 30, 2026 | Dec. 31, 2025
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Investments, Debt and Equity Securities [Abstract] |  |
Initial cost | $ 20,816 | $ 20,271
Cumulative upward adjustments | 559 | 429
Cumulative impairment/downward adjustments | (624) | (624)
Non-marketable equity investments under measurement alternative | 20,751 | 20,076
Non-marketable equity investments under equity method | 9,406 | 7,448
Total carrying value of non-marketable equity investments | $ 30,157 | $ 27,524

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