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Investments - Unrealized Gains (Losses) Included in the Carrying Value of Measurement Alternative Investments and Marketable Securities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Investments, Debt and Equity Securities [Abstract]
Upward adjustments	$ 11	$ 7	$ 114
Downward adjustments (including impairment)	(9)	(145)	(23)
Marketable Securities, Unrealized Gain (Loss)	$ (34)	$ 97	$ (213)

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- Definition

Alternative Investment, Downward Price Adjustment Including Impairment, Annual Amount

+ References

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Alternative Investments, Upward Price Adjustment, Annual Amount

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- Definition

Amount of unrealized gain (loss) on investment in marketable security.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(7)(c))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2

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