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Investments - Equity Investments (Details) - USD ($) $ in Millions | Oct. 31, 2024 | Jan. 31, 2024 | Oct. 31, 2023
--- | --- | --- | ---
Investments, Debt and Equity Securities [Abstract] |  |  |
Equity securities | $ 849 | $ 1,017 | $ 29
Non-marketable equity investments measured using the measurement alternative | 242 | 248 |
Equity investments | $ 1,091 | $ 1,265 |

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