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Financial Instruments - Schedule of Financial Assets Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Millions | Mar. 31, 2026 | Dec. 31, 2025
--- | --- | ---
Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value | $ 7,456 | $ 8,135
Certificates of deposit | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value | 61 | 91
U.S. treasury bills | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value | 610 | 653
U.S. treasury notes | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value | 2,226 | 2,190
Corporate debt securities | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value | 2,595 | 2,540
Government debt securities | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value | 56 | 66
Fair Value, Recurring |  |
Debt Securities, Available-for-sale [Line Items] |  |
Derivative instruments | 8 | 1
Total | 7,067 | 7,925
Derivative instruments |  | 4
Fair Value, Recurring | Level 1 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Derivative instruments | 0 | 0
Total | 597 | 969
Derivative instruments |  | 0
Fair Value, Recurring | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Derivative instruments | 8 | 1
Total | 6,470 | 6,956
Derivative instruments |  | 4
Fair Value, Recurring | Money market funds |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value | 595 | 963
Fair Value, Recurring | Money market funds | Level 1 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value | 595 | 963
Fair Value, Recurring | Money market funds | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value | 0 | 0
Fair Value, Recurring | Certificates of deposit |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value | 61 | 91
Fair Value, Recurring | Certificates of deposit | Level 1 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value | 0 | 0
Fair Value, Recurring | Certificates of deposit | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value | 61 | 91
Fair Value, Recurring | U.S. treasury bills |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value | 1,141 | 1,445
Fair Value, Recurring | U.S. treasury bills | Level 1 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value | 0 | 0
Fair Value, Recurring | U.S. treasury bills | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value | 1,141 | 1,445
Fair Value, Recurring | U.S. treasury notes |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value | 2,226 | 2,190
Fair Value, Recurring | U.S. treasury notes | Level 1 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value | 0 | 0
Fair Value, Recurring | U.S. treasury notes | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value | 2,226 | 2,190
Fair Value, Recurring | Corporate debt securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value | 2,978 | 3,163
Fair Value, Recurring | Corporate debt securities | Level 1 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value | 0 | 0
Fair Value, Recurring | Corporate debt securities | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value | 2,978 | 3,163
Fair Value, Recurring | Government debt securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value | 56 | 66
Fair Value, Recurring | Government debt securities | Level 1 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value | 0 | 0
Fair Value, Recurring | Government debt securities | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value | 56 | 66
Fair Value, Recurring | Equity investments |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value | 2 | 6
Fair Value, Recurring | Equity investments | Level 1 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value | 2 | 6
Fair Value, Recurring | Equity investments | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value | $ 0 | $ 0

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