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v3.25.3

Marketable Securities - Narrative (Details) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Oct. 31, 2025 USD ($) security | Oct. 31, 2024 USD ($) | Oct. 31, 2025 USD ($) security | Oct. 31, 2024 USD ($) | Jan. 31, 2025 USD ($) security
Investments, Debt and Equity Securities [Abstract] |  |  |  |  |
Investment income, interest | $ 4,600,000 | $ 5,600,000 | $ 15,500,000 | $ 20,900,000 |
Debt securities in an unrealized loss position | security | 34 |  | 34 |  | 40
Unleased loss position | $ 94,000,000 |  | $ 94,000,000 |  | $ 140,000,000
Expected credit losses | $ 0 |  | $ 0 |  | $ 0

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