Fair Value Measurements - (Recurring and Nonrecurring) (Details) - Recurring - USD ($) $ in Millions |
Apr. 30, 2026 |
Jan. 31, 2026 |
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| Debt and Equity Securities, FV-NI [Line Items] | ||
| Total | $ 6,009 | $ 5,675 |
| Inputs, Level 1 | ||
| Debt and Equity Securities, FV-NI [Line Items] | ||
| Equity investments | 1,033 | 1,037 |
| Inputs, Level 2 | ||
| Debt and Equity Securities, FV-NI [Line Items] | ||
| Equity investments | 3,784 | 3,462 |
| Inputs, Level 3 | ||
| Debt and Equity Securities, FV-NI [Line Items] | ||
| Debt investments | $ 1,192 | $ 1,176 |
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- Definition Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as current. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in net income (trading). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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