v3.25.4
Investments and Fair Value Measurement - Fair Value on a Recurring Basis (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Financial Assets    
Non-marketable debt securities $ 10,326 $ 8,562
Non-marketable equity securities 4,397 3,199
Financial Liabilities    
2028 Exchangeable Senior Notes 11,100 9,500
Derivative liability 0 0
Assets transferred into (out of) Level 3 0 0
Liabilities transferred into (out of) Level 3 0 0
U.S. government and agency securities    
Financial Assets    
Non-marketable debt securities 7,323 5,848
Commercial paper    
Financial Assets    
Non-marketable debt securities 715 702
Corporate bonds    
Financial Assets    
Non-marketable debt securities 2,194 1,974
Certificates of deposit    
Financial Assets    
Non-marketable debt securities 72 38
Mortgage-backed and asset-backed securities    
Financial Assets    
Non-marketable debt securities 22  
Recurring    
Financial Assets    
Non-marketable equity securities 69 11
Marketable equity securities 4,593 5,106
Notes receivable from a related party 190 144
Total financial assets 16,802 15,691
Financial Liabilities    
Derivative liability 5  
Total financial liabilities 1,130 0
Recurring | Senior Note | 2028 Exchangeable Senior Notes    
Financial Liabilities    
2028 Exchangeable Senior Notes 1,125 0
Recurring | Level 1    
Financial Assets    
Non-marketable equity securities 0 0
Marketable equity securities 4,593 5,106
Notes receivable from a related party 0 0
Total financial assets 6,217 6,974
Financial Liabilities    
Derivative liability 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
Notes receivable from a related party 0 0
Total financial assets 10,326 8,562
Financial Liabilities    
Derivative liability 5 0
Total financial liabilities 1,130 0
Recurring | Level 2 | Senior Note | 2028 Exchangeable Senior Notes    
Financial Liabilities    
2028 Exchangeable Senior Notes 1,125 0
Recurring | Level 3    
Financial Assets    
Non-marketable equity securities 69 11
Marketable equity securities 0 0
Notes receivable from a related party 190 144
Total financial assets 259 155
Financial Liabilities    
Derivative liability 0 0
Total financial liabilities 0 0
Recurring | Level 3 | Senior Note | 2028 Exchangeable Senior Notes    
Financial Liabilities    
2028 Exchangeable Senior Notes 0 0
Recurring | Money market funds    
Financial Assets    
Cash and cash equivalents 1,624 1,868
Recurring | Money market funds | Level 1    
Financial Assets    
Cash and cash equivalents 1,624 1,868
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 7,323 5,848
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 7,323 5,848
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 715 702
Recurring | Commercial paper | Level 1    
Financial Assets    
Non-marketable debt securities 0 0
Recurring | Commercial paper | Level 2    
Financial Assets    
Non-marketable debt securities 715 702
Recurring | Commercial paper | Level 3    
Financial Assets    
Non-marketable debt securities 0 0
Recurring | Corporate bonds    
Financial Assets    
Non-marketable debt securities 2,194 1,974
Recurring | Corporate bonds | Level 1    
Financial Assets    
Non-marketable debt securities 0 0
Recurring | Corporate bonds | Level 2    
Financial Assets    
Non-marketable debt securities 2,194 1,974
Recurring | Corporate bonds | Level 3    
Financial Assets    
Non-marketable debt securities 0 0
Recurring | Certificates of deposit    
Financial Assets    
Non-marketable debt securities 72 38
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 72 38
Recurring | Certificates of deposit | Level 3    
Financial Assets    
Non-marketable debt securities 0 0
Recurring | Mortgage-backed and asset-backed securities    
Financial Assets    
Non-marketable debt securities 22 0
Recurring | Mortgage-backed and asset-backed securities | Level 1    
Financial Assets    
Non-marketable debt securities 0 0
Recurring | Mortgage-backed and asset-backed securities | Level 2    
Financial Assets    
Non-marketable debt securities 22 0
Recurring | Mortgage-backed and asset-backed securities | Level 3    
Financial Assets    
Non-marketable debt securities $ 0 $ 0