Investments and Fair Value Measurement - Schedule of Fair Value on a Recurring Basis (Details) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
Financial Assets
Non-marketable debt securities	$ 9,837	$ 10,326
Non-marketable equity securities	4,087	4,397
Derivative assets	0	0
Financial Liabilities
2028 Exchangeable Senior Notes	10,700	11,100
Derivative liabilities	0	0
Recurring
Financial Assets
Non-marketable equity securities	50	69
Marketable equity securities	3,873	4,593
Note receivable from a related party	170	190
Derivative assets	97	0
Total financial assets	14,388	16,802
Financial Liabilities
Derivative liabilities	7	5
Total financial liabilities	1,122	1,130
Recurring \| Senior Note \| 2028 Exchangeable Senior Notes
Financial Liabilities
2028 Exchangeable Senior Notes	1,115	1,125
Recurring \| Level 1
Financial Assets
Non-marketable equity securities	0	0
Marketable equity securities	3,873	4,593
Note receivable from a related party	0	0
Derivative assets	0	0
Total financial assets	4,234	6,217
Financial Liabilities
Derivative liabilities	0	0
Total financial liabilities	0	0
Recurring \| Level 1 \| Senior Note \| 2028 Exchangeable Senior Notes
Financial Liabilities
2028 Exchangeable Senior Notes	0	0
Recurring \| Level 2
Financial Assets
Non-marketable equity securities	0	0
Marketable equity securities	0	0
Note receivable from a related party	0	0
Derivative assets	8	0
Total financial assets	9,845	10,326
Financial Liabilities
Derivative liabilities	7	5
Total financial liabilities	1,122	1,130
Recurring \| Level 2 \| Senior Note \| 2028 Exchangeable Senior Notes
Financial Liabilities
2028 Exchangeable Senior Notes	1,115	1,125
Recurring \| Level 3
Financial Assets
Non-marketable equity securities	50	69
Marketable equity securities	0	0
Note receivable from a related party	170	190
Derivative assets	89	0
Total financial assets	309	259
Financial Liabilities
Derivative liabilities	0	0
Total financial liabilities	0	0
Recurring \| Level 3 \| Senior Note \| 2028 Exchangeable Senior Notes
Financial Liabilities
2028 Exchangeable Senior Notes	0	0
U.S. government and agency securities
Financial Assets
Non-marketable debt securities	7,344	7,323
U.S. government and agency securities \| Recurring
Financial Assets
Non-marketable debt securities	7,344	7,323
U.S. government and agency securities \| Recurring \| Level 1
Financial Assets
Non-marketable debt securities	0	0
U.S. government and agency securities \| Recurring \| Level 2
Financial Assets
Non-marketable debt securities	7,344	7,323
U.S. government and agency securities \| Recurring \| Level 3
Financial Assets
Non-marketable debt securities	0	0
Commercial paper
Financial Assets
Non-marketable debt securities	217	715
Commercial paper \| Recurring
Financial Assets
Non-marketable debt securities	217	715
Commercial paper \| Recurring \| Level 1
Financial Assets
Non-marketable debt securities	0	0
Commercial paper \| Recurring \| Level 2
Financial Assets
Non-marketable debt securities	217	715
Commercial paper \| Recurring \| Level 3
Financial Assets
Non-marketable debt securities	0	0
Corporate bonds
Financial Assets
Non-marketable debt securities	2,117	2,194
Corporate bonds \| Recurring
Financial Assets
Non-marketable debt securities	2,117	2,194
Corporate bonds \| Recurring \| Level 1
Financial Assets
Non-marketable debt securities	0	0
Corporate bonds \| Recurring \| Level 2
Financial Assets
Non-marketable debt securities	2,117	2,194
Corporate bonds \| Recurring \| Level 3
Financial Assets
Non-marketable debt securities	0	0
Certificates of deposit
Financial Assets
Non-marketable debt securities	124	72
Certificates of deposit \| Recurring
Financial Assets
Non-marketable debt securities	124	72
Certificates of deposit \| Recurring \| Level 1
Financial Assets
Non-marketable debt securities	0	0
Certificates of deposit \| Recurring \| Level 2
Financial Assets
Non-marketable debt securities	124	72
Certificates of deposit \| Recurring \| Level 3
Financial Assets
Non-marketable debt securities	0	0
Mortgage-backed and asset-backed securities
Financial Assets
Non-marketable debt securities	35	22
Mortgage-backed and asset-backed securities \| Recurring
Financial Assets
Non-marketable debt securities	35	22
Mortgage-backed and asset-backed securities \| Recurring \| Level 1
Financial Assets
Non-marketable debt securities	0	0
Mortgage-backed and asset-backed securities \| Recurring \| Level 2
Financial Assets
Non-marketable debt securities	35	22
Mortgage-backed and asset-backed securities \| Recurring \| Level 3
Financial Assets
Non-marketable debt securities	0	0
Money market funds \| Recurring
Financial Assets
Cash and cash equivalents	361	1,624
Money market funds \| Recurring \| Level 1
Financial Assets
Cash and cash equivalents	361	1,624
Money market funds \| Recurring \| Level 2
Financial Assets
Cash and cash equivalents	0	0
Money market funds \| Recurring \| Level 3
Financial Assets
Cash and cash equivalents	$ 0	$ 0

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

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