Investments and Fair Value Measurement - Fair Value on a Recurring Basis (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Financial Assets
Non-marketable debt securities	$ 8,562
Non-marketable equity securities	3,199	$ 2,574
U.S. government and agency securities
Financial Assets
Non-marketable debt securities	5,848
Commercial paper
Financial Assets
Non-marketable debt securities	702
Corporate bonds
Financial Assets
Non-marketable debt securities	1,974
Certificates of deposit
Financial Assets
Non-marketable debt securities	38
Recurring
Financial Assets
Non-marketable equity securities	11	0
Marketable equity securities	5,106	3,401
Notes receivable from a related party	144	126
Total financial assets	15,691	10,400
Recurring \| Level 1
Financial Assets
Non-marketable equity securities	0	0
Marketable equity securities	5,106	3,401
Notes receivable from a related party	0	0
Total financial assets	6,974	4,554
Recurring \| Level 2
Financial Assets
Non-marketable equity securities	0	0
Marketable equity securities	0	0
Notes receivable from a related party	0	0
Total financial assets	8,562	5,720
Recurring \| Level 3
Financial Assets
Non-marketable equity securities	11	0
Marketable equity securities	0	0
Notes receivable from a related party	144	126
Total financial assets	155	126
Recurring \| Money market funds
Financial Assets
Cash and cash equivalents	1,868	1,153
Recurring \| Money market funds \| Level 1
Financial Assets
Cash and cash equivalents	1,868	1,153
Recurring \| Money market funds \| Level 2
Financial Assets
Cash and cash equivalents	0	0
Recurring \| Money market funds \| Level 3
Financial Assets
Cash and cash equivalents	0	0
Recurring \| U.S. government and agency securities
Financial Assets
Non-marketable debt securities	5,848	4,840
Recurring \| U.S. government and agency securities \| Level 1
Financial Assets
Non-marketable debt securities	0	0
Recurring \| U.S. government and agency securities \| Level 2
Financial Assets
Non-marketable debt securities	5,848	4,840
Recurring \| U.S. government and agency securities \| Level 3
Financial Assets
Non-marketable debt securities	0	0
Recurring \| Commercial paper
Financial Assets
Non-marketable debt securities	702	351
Recurring \| Commercial paper \| Level 1
Financial Assets
Non-marketable debt securities	0	0
Recurring \| Commercial paper \| Level 2
Financial Assets
Non-marketable debt securities	702	351
Recurring \| Commercial paper \| Level 3
Financial Assets
Non-marketable debt securities	0	0
Recurring \| Corporate bonds
Financial Assets
Non-marketable debt securities	1,974	263
Recurring \| Corporate bonds \| Level 1
Financial Assets
Non-marketable debt securities	0	0
Recurring \| Corporate bonds \| Level 2
Financial Assets
Non-marketable debt securities	1,974	263
Recurring \| Corporate bonds \| Level 3
Financial Assets
Non-marketable debt securities	0	0
Recurring \| Certificates of deposit
Financial Assets
Non-marketable debt securities	38	266
Recurring \| Certificates of deposit \| Level 1
Financial Assets
Non-marketable debt securities	0	0
Recurring \| Certificates of deposit \| Level 2
Financial Assets
Non-marketable debt securities	38	266
Recurring \| Certificates of deposit \| Level 3
Financial Assets
Non-marketable debt securities	$ 0	$ 0

Fair value portion of asset recognized for present right to economic benefit.

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