Accounting Policies and Supplemental Disclosures - Other Income (Expense), Net (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Accounting Policies [Abstract]
Marketable equity securities valuation gains (losses)	$ (2,126)	$ (480)
Equity warrant valuation gains (losses)	(230)	59
Upward adjustments relating to equity investments in private companies	5	16
Foreign currency gains (losses)	(74)	70
Other, net	(248)	(108)
Total other income (expense), net	(2,673)	(443)
Schedule of Investments [Line Items]
Marketable equity securities valuation gains (losses)	(2,126)	(480)
Loss from operations	15,307	4,774
Net loss	10,431	3,172	$ 37,684		$ 4,294
Equity method investment, nonconsolidated investee
Accounting Policies [Abstract]
Marketable equity securities valuation gains (losses)	(2,000)	(467)
Schedule of Investments [Line Items]
Marketable equity securities valuation gains (losses)	$ (2,000)	$ (467)
Equity investment, shares held (in shares)	158		158
Equity investment, ownership percentage	16.00%		16.00%
Equity investment, voting interest	15.00%		15.00%
Equity investment, fair value	$ 1,700		$ 1,700	$ 3,700
Revenues				4,434		$ 1,658
Gross profit				(2,030)		(3,123)
Loss from operations				(5,739)		(6,856)
Net loss				$ (5,432)		$ (6,752)