Investments - Narrative (Detail) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2021 |
Dec. 31, 2020 |
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| Debt Securities, Available-for-sale [Abstract] | ||
| Contractual maturities term (maximum) | 36 months | |
| Unrealized loss | $ 2,416 | $ 637 |
| Debt and equity investments in privately-held companies included in other assets | $ 99 | $ 28 |
| X | ||||||||||
- Definition Debt Securities, Available-for-sale, Maturity, Term, Maximum No definition available.
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- References No definition available.
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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/disclosureRef
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- Definition Amount of long-term investments classified as other. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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