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Financial Instruments - Information on Available-for-sale Investments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Debt securities, amortized cost	$ 760		$ 569
Debt securities, unrealized gains	0		0
Debt securities, unrealized losses	0		0
Debt securities, fair value	760		569
Publicly traded equity securities, fair value	1,585		1,284
Total debt and publicly traded equity securities, fair value	2,345		1,853
Unrealized net (gains) losses	(338)	$ 225
Commercial paper
Debt Securities, Available-for-sale [Line Items]
Debt securities, amortized cost	663		498
Debt securities, unrealized gains	0		0
Debt securities, unrealized losses	0		0
Debt securities, fair value	663		498
U.S. government and agency securities
Debt Securities, Available-for-sale [Line Items]
Debt securities, amortized cost	92		68
Debt securities, unrealized gains	0		0
Debt securities, unrealized losses	0		0
Debt securities, fair value	92		68
Corporate notes and bonds
Debt Securities, Available-for-sale [Line Items]
Debt securities, amortized cost	4		3
Debt securities, unrealized gains	0		0
Debt securities, unrealized losses	0		0
Debt securities, fair value	4		3
Foreign government bonds
Debt Securities, Available-for-sale [Line Items]
Debt securities, amortized cost	1		0
Debt securities, unrealized gains	0		0
Debt securities, unrealized losses	0		0
Debt securities, fair value	$ 1		$ 0

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