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Financial Instruments - Schedule of Marketable Securities (Details) - USD ($) $ in Millions | 12 Months Ended
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Jan. 31, 2025 | Jan. 31, 2024 | Jan. 31, 2023
Investments, Debt and Equity Securities [Abstract] |  |  |
Marketable debt securities | $ 861 | $ 764 | $ 450

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- Definition The cash inflow associated with the aggregate amount received by the entity through sale or maturity of marketable securities (held-to-maturity or available-for-sale) during the period. + References No definition available. + Details
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