Description of Business, Accounting Policies, and Supplemental Disclosures - Other Income (Expense), Net (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
Sep. 30, 2025	Mar. 31, 2025	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Accounting Policies [Abstract]
Marketable equity securities valuation gains (losses), net			$ 1,439	$ (1,278)	$ 984
Equity warrant valuation gains (losses), net			553	(192)	26
Reclassification adjustments for gains (losses) on available-for-sale debt securities, net	$ 2,300	$ 3,300	5,600	(7)	(65)
Upward adjustments relating to equity investments in private companies	$ 7,200		7,709	49	40
Foreign currency gains (losses), net			19	(408)	65
Other, net			(91)	(414)	(112)
Total other income (expense), net			$ 15,229	$ (2,250)	$ 938

Debt Securities, Available-for-Sale, Reclassification Adjustment from AOCI

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