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v3.25.3

Investments - Information about Investments (Detail) - USD ($) $ in Millions | Sep. 30, 2025 | Dec. 31, 2024
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Investments, Fair Value Disclosure [Abstract] |  |
Available-for-sale securities, at fair value | $ 103,962 | $ 79,458
Held-to-maturity securities | 73,632 | 78,713
Equity securities, at fair value | 14,114 | 13,832
Debt instruments, at fair value | 11,100 | 11,452
Equity-method investments | 949 | 1,059
Total other investments | 26,163 | 26,343
Total investments | $ 203,757 | $ 184,514

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