Non-Marketable Equity Investments - Summary of Non-Marketable Equity Securities Measured Using Measurement Alternative (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Investments, Debt and Equity Securities [Abstract]
Initial cost	$ 20,231	$ 6,342
Cumulative upward adjustments	359	300
Cumulative impairment/downward adjustments	(624)	(624)
Carrying value	19,966	6,018
Non-marketable equity investments under equity method	2,022	52
Total non-marketable equity investments	$ 21,988	$ 6,070

Equity Securities without Readily Determinable Fair Value, Impairment and Downward Price Adjustment, Cumulative Amount

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Equity Securities without Readily Determinable Fair Value, Initial Cost

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Nonmarketable Equity Securities, Carrying Value

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Amount of investment in equity security without readily determinable fair value.

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- Definition

Amount of cumulative gain from upward price adjustment on investment in equity security without readily determinable fair value.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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