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Fair Value Measurements - Narrative (Details) | 9 Months Ended |
--- | --- | ---
Oct. 31, 2025 USD ($) security | Oct. 31, 2024 USD ($) | Jan. 31, 2025 security
Fair Value Disclosures [Abstract] |  |  |
Debt securities, available-for-sale, continuous unrealized loss position, 12 months or longer, number of securities | security | 0 |  | 0
Debt securities, available-for-sale, impairment Loss | $ | $ 0 | $ 0 |

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- Definition Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without an allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479106/326-30-50-4 + Details
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