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Financial Instruments - Schedule of Assets Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Millions | Jun. 30, 2026 | Dec. 31, 2025
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Cash equivalents: | $ 12,133 | $ 31,482
Marketable securities: | 71,255 |
Marketable equity securities | 3,543 | 5,992
Total marketable securities | 74,798 | 45,719
Restricted cash equivalents | 13,554 | 2,539
Other assets | 114 | 106
Total | 100,599 | 79,846
U.S. government securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Marketable securities: | 41,724 | 21,483
U.S. government agency securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Marketable securities: | 940 | 767
Corporate debt securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Marketable securities: | 28,591 | 17,477
Money market funds |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Cash equivalents: | 5,223 | 27,928
U.S. government securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Cash equivalents: | 2,077 | 1,623
Time deposits |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Cash equivalents: | 350 | 328
Corporate debt securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Cash equivalents: | 4,483 | 1,603
Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Cash equivalents: | 7,300 | 29,551
Marketable equity securities | 3,543 | 5,992
Total marketable securities | 46,207 | 28,242
Restricted cash equivalents | 13,554 | 2,539
Other assets | 0 | 0
Total | 67,061 | 60,332
Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. government securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Marketable securities: | 41,724 | 21,483
Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. government agency securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Marketable securities: | 940 | 767
Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate debt securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Marketable securities: | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Money market funds |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Cash equivalents: | 5,223 | 27,928
Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. government securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Cash equivalents: | 2,077 | 1,623
Quoted Prices in Active Markets for Identical Assets (Level 1) | Time deposits |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Cash equivalents: | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate debt securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Cash equivalents: | 0 | 0
Significant Other Observable Inputs (Level 2) |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Cash equivalents: | 4,833 | 1,931
Marketable equity securities | 0 | 0
Total marketable securities | 28,591 | 17,477
Restricted cash equivalents | 0 | 0
Other assets | 0 | 0
Total | 33,424 | 19,408
Significant Other Observable Inputs (Level 2) | U.S. government securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Marketable securities: | 0 | 0
Significant Other Observable Inputs (Level 2) | U.S. government agency securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Marketable securities: | 0 | 0
Significant Other Observable Inputs (Level 2) | Corporate debt securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Marketable securities: | 28,591 | 17,477
Significant Other Observable Inputs (Level 2) | Money market funds |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Cash equivalents: | 0 | 0
Significant Other Observable Inputs (Level 2) | U.S. government securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Cash equivalents: | 0 | 0
Significant Other Observable Inputs (Level 2) | Time deposits |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Cash equivalents: | 350 | 328
Significant Other Observable Inputs (Level 2) | Corporate debt securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Cash equivalents: | 4,483 | 1,603
Significant Unobservable Inputs (Level 3) |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Cash equivalents: | 0 | 0
Marketable equity securities | 0 | 0
Total marketable securities | 0 | 0
Restricted cash equivalents | 0 | 0
Other assets | 114 | 106
Total | 114 | 106
Significant Unobservable Inputs (Level 3) | U.S. government securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Marketable securities: | 0 | 0
Significant Unobservable Inputs (Level 3) | U.S. government agency securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Marketable securities: | 0 | 0
Significant Unobservable Inputs (Level 3) | Corporate debt securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Marketable securities: | 0 | 0
Significant Unobservable Inputs (Level 3) | Money market funds |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Cash equivalents: | 0 | 0
Significant Unobservable Inputs (Level 3) | U.S. government securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Cash equivalents: | 0 | 0
Significant Unobservable Inputs (Level 3) | Time deposits |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Cash equivalents: | 0 | 0
Significant Unobservable Inputs (Level 3) | Corporate debt securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis |  |
Cash equivalents: | $ 0 | $ 0

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