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Financial Instruments - Equity Investments without Readily Determinable Fair Values (Details) - Equity Investments In Private Companies - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Schedule of Equity Method Investments [Line Items]
Total initial value	$ 1,078	$ 957
Cumulative gross unrealized gains	310	144
Cumulative gross unrealized losses and impairment	(414)	(384)
Equity and Other Investments	$ 974	$ 717

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- Definition

Equity Securities Without Readily Determinable Fair Value, Downward Price Adjustment And Impairment Loss, Cumulative Amount

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- Definition

Amount of investment in equity security without readily determinable fair value.

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

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