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Investments - Short-Term and Long-Term Investment Securities (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Investment securities |  |
Available-for-sale investment securities | $ 330 | $ 337
Held-to-maturity investment securities | 234 | 177
Total investments in debt securities | 564 | 514
Time deposits |  |
Investment securities |  |
Available-for-sale investment securities | 290 | 285
Commercial paper |  |
Investment securities |  |
Available-for-sale investment securities | 24 | 39
Debt securities |  |
Investment securities |  |
Available-for-sale investment securities | 16 | 13
Corporate bonds |  |
Investment securities |  |
Held-to-maturity investment securities | $ 234 | $ 177

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