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Investments - Schedule of Non-Marketable Equity Investments (Details) - USD ($) $ in Millions | Jul. 31, 2025 | Jan. 31, 2025
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Investments, Debt and Equity Securities [Abstract] |  |
Total initial cost | $ 223 | $ 217
Cumulative net unrealized gains (losses) | 28 | 27
Carrying value | $ 251 | $ 244

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- Definition Amount of investment in equity security without readily determinable fair value. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 321 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479536/321-10-50-3 + Details
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- Definition Equity Securities without Readily Determinable Fair Value, Cost + References No definition available. + Details
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- Definition Equity Securities without Readily Determinable Fair Value, Cumulative Unrealized Gain (Loss) + References No definition available. + Details
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