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Cash Equivalents and Investments - Schedule of Cash Equivalents and Short and Long-Term Investments (Details) - USD ($) $ in Millions | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2026 | Dec. 31, 2025
Debt Securities, Available-for-Sale [Line Items] |  |
Amortized Cost | $ 5,906 | $ 5,339
Gross Unrealized Gains | 1 | 13
Gross Unrealized Losses | (23) | 0
Fair Value | 5,889 | 5,356
Cash Equivalents | 796 | 1,013
Short-Term Investments | 2,023 | 1,850
Long-Term Investments | 3,070 | 2,493
Debt Securities |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Amortized Cost | 5,906 | 5,339
Gross Unrealized Gains | 1 | 13
Gross Unrealized Losses | (23) | 0
Fair Value | 5,884 | 5,352
Cash Equivalents | 796 | 1,013
Short-Term Investments | 2,018 | 1,846
Long-Term Investments | 3,070 | 2,493
Level 1 | Debt Securities |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Amortized Cost | 3,634 | 3,561
Gross Unrealized Gains | 0 | 7
Gross Unrealized Losses | (12) | 0
Fair Value | 3,622 | 3,568
Cash Equivalents | 796 | 1,013
Short-Term Investments | 1,438 | 1,427
Long-Term Investments | 1,388 | 1,128
Level 1 | Equity Securities |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Fair Value | 5 | 4
Cash Equivalents | 0 | 0
Short-Term Investments | 5 | 4
Long-Term Investments | 0 | 0
Level 2 | Debt Securities |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Amortized Cost | 2,272 | 1,778
Gross Unrealized Gains | 1 | 6
Gross Unrealized Losses | (11) | 0
Fair Value | 2,262 | 1,784
Cash Equivalents | 0 | 0
Short-Term Investments | 580 | 419
Long-Term Investments | 1,682 | 1,365
Money market funds | Level 1 | Debt Securities |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Amortized Cost | 796 | 1,010
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | 0
Fair Value | 796 | 1,010
Cash Equivalents | 796 | 1,010
Short-Term Investments | 0 | 0
Long-Term Investments | 0 | 0
U.S. Treasury securities | Level 1 | Debt Securities |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Amortized Cost | 2,838 | 2,551
Gross Unrealized Gains | 0 | 7
Gross Unrealized Losses | (12) | 0
Fair Value | 2,826 | 2,558
Cash Equivalents | 0 | 3
Short-Term Investments | 1,438 | 1,427
Long-Term Investments | 1,388 | 1,128
U.S. agency securities | Level 2 | Debt Securities |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Amortized Cost | 704 | 542
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (7) | 0
Fair Value | 697 | 542
Cash Equivalents | 0 | 0
Short-Term Investments | 0 | 0
Long-Term Investments | 697 | 542
Commercial paper | Level 2 | Debt Securities |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Amortized Cost | 436 | 325
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | 0
Fair Value | 436 | 325
Cash Equivalents | 0 | 0
Short-Term Investments | 436 | 325
Long-Term Investments | 0 | 0
Corporate debt securities | Level 2 | Debt Securities |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Amortized Cost | 1,132 | 911
Gross Unrealized Gains | 1 | 6
Gross Unrealized Losses | (4) | 0
Fair Value | 1,129 | 917
Cash Equivalents | 0 | 0
Short-Term Investments | 144 | 94
Long-Term Investments | 985 | 823
Mutual funds | Level 1 | Equity Securities |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Fair Value | 5 | 4
Cash Equivalents | 0 | 0
Short-Term Investments | 5 | 4
Long-Term Investments | $ 0 | $ 0

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