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Investments - Available-For-Sale (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract] |  |  |
Cash | $ 540 | $ 4,970 |
Interest income | $ 1,200 | $ 127 | $ 11

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