Investments and Fair Value Measurements - Additional Information (Detail) $ in Millions |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
|
Sep. 30, 2026
USD ($)
security
|
Sep. 30, 2025
USD ($)
|
Sep. 30, 2026
USD ($)
security
|
Sep. 30, 2025
USD ($)
|
Dec. 31, 2025
USD ($)
security
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | |||||
| Proceeds from sale of available-for-sale securities | $ 0 | $ 0 | $ 0 | $ 280 | |
| Available-for-sale debt securities in unrealized loss position | $ 5,900 | $ 5,900 | $ 700 | ||
| Number of securities in an unrealized loss position for greater than 12 months | security | 0 | 0 | 0 | ||
| Privately-held equity securities without readily determinable fair value, amount | $ 217 | $ 217 | $ 170 | ||
| Publicly-Traded Equity Securities Held | |||||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | |||||
| Unrealized gain (loss) from equity securities | $ (25) | $ 42 | |||
| X | ||||||||||
- Definition Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without an allowance for credit loss. Includes beneficial interest in securitized financial asset. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- 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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| X | ||||||||||
- Definition Amount of unrealized gain (loss) on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of investment in equity security without readily determinable fair value. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- 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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| X | ||||||||||
- Definition Amount of cash inflow from sale 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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| X | ||||||||||
- Details
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