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Investments - Short-Term and Long-Term Investment Securities (Details) - USD ($) $ in Millions | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Investment securities |  |
Total available-for-sale investment securities | $ 1,145 | $ 1,621
Total held-to-maturity investment securities | 382 | 404
Total investment in debt securities | 1,527 | 2,025
Time deposits |  |
Investment securities |  |
Total available-for-sale investment securities | 680 | 1,148
Commercial paper |  |
Investment securities |  |
Total available-for-sale investment securities | 456 | 461
Debt securities |  |
Investment securities |  |
Total available-for-sale investment securities | 9 | 12
Corporate bonds |  |
Investment securities |  |
Total held-to-maturity investment securities | $ 382 | $ 404

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