Marketable Securities - Summary of Aggregate Fair Value of Marketable Debt Securities (Detail) - USD ($) $ in Millions |
Sep. 30, 2026 |
Dec. 31, 2025 |
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| Debt Securities, Available-for-Sale, Unrealized Loss Position [Abstract] | ||
| Debt securities in an unrealized loss position for 12 months or less | $ 1,587,181 | $ 193,841 |
| Debt securities in an unrealized loss position for more than 12 months | 4,021 | 0 |
| Total debt securities in an unrealized loss position | $ 1,591,202 | $ 193,841 |
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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position without allowance for credit loss. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- References No definition available.
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