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Financial Instruments and Fair Value Measurements - Financial Assets and Liabilities Measured At Fair Value On a Recurring Basis (Details) - USD ($) $ in Millions | Dec. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | $ 8,135 | $ 9,519
Certificates of deposit | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 91 | 52
U.S. treasury bills | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 653 | 786
U.S. treasury notes | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 2,190 | 3,036
Corporate debt securities | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 2,540 | 3,580
Government debt securities | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 66 | 138
Fair value recurring |  |
Debt Securities, Available-for-sale [Line Items] |  |
Derivative instruments | 1 | 10
Total | $ 7,925 | $ 9,224
Derivative Liability, Statement of Financial Position [Extensible Enumeration] | Other current liabilities | Other current liabilities
Derivative instruments, liabilities | $ 4 | $ 2
Fair value recurring | Level 1 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Derivative instruments | 0 | 0
Total | 969 | 1,209
Derivative instruments, liabilities | 0 | 0
Fair value recurring | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Derivative instruments | 1 | 10
Total | 6,956 | 8,015
Derivative instruments, liabilities | 4 | 2
Fair value recurring | Money market funds |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 963 | 1,195
Fair value recurring | Money market funds | Level 1 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 963 | 1,195
Fair value recurring | Money market funds | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 0 | 0
Fair value recurring | Certificates of deposit |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 91 | 52
Fair value recurring | Certificates of deposit | Level 1 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 0 | 0
Fair value recurring | Certificates of deposit | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 91 | 52
Fair value recurring | U.S. treasury bills |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 1,445 | 1,016
Fair value recurring | U.S. treasury bills | Level 1 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 0 | 0
Fair value recurring | U.S. treasury bills | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 1,445 | 1,016
Fair value recurring | U.S. treasury notes |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 2,190 | 3,036
Fair value recurring | U.S. treasury notes | Level 1 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 0 | 0
Fair value recurring | U.S. treasury notes | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 2,190 | 3,036
Fair value recurring | Corporate debt securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 3,163 | 3,763
Fair value recurring | Corporate debt securities | Level 1 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 0 | 0
Fair value recurring | Corporate debt securities | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 3,163 | 3,763
Fair value recurring | Government debt securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 66 | 138
Fair value recurring | Government debt securities | Level 1 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 0 | 0
Fair value recurring | Government debt securities | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 66 | 138
Fair value recurring | Equity investments |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 6 | 14
Fair value recurring | Equity investments | Level 1 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 6 | 14
Fair value recurring | Equity investments | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | $ 0 | $ 0

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