Cash, Cash Equivalents, Restricted Cash and Investments - Schedule of Amortized Cost, Unrealized Gains and Losses and Fair Value of Available-for-Sale Debt Securities (Details) - USD ($) $ in Millions |
Mar. 31, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Debt Securities, Available-for-sale [Line Items] | ||
| Amortized cost | $ 1,004 | $ 1,237 |
| Unrealized gains | 0 | 1 |
| Fair value | 1,004 | 1,238 |
| U.S. Treasury securities | ||
| Debt Securities, Available-for-sale [Line Items] | ||
| Amortized cost | 620 | 765 |
| Unrealized gains | 0 | 1 |
| Fair value | 620 | 766 |
| Commercial paper | ||
| Debt Securities, Available-for-sale [Line Items] | ||
| Amortized cost | 7 | 39 |
| Unrealized gains | 0 | 0 |
| Fair value | 7 | 39 |
| Corporate bonds and notes | ||
| Debt Securities, Available-for-sale [Line Items] | ||
| Amortized cost | 377 | 433 |
| Unrealized gains | 0 | 0 |
| Fair value | $ 377 | $ 433 |
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- Definition Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amortized cost excluding accrued interest, before allowance for credit loss, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount excluding accrued interest, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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