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Fair Value Measurements - Additional Information (Details) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Apr. 30, 2026 | Apr. 30, 2025 | Apr. 30, 2026 | Apr. 30, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Assets transfers or reclassifications out of level 3 | $ 0 | $ 0 | $ 0 | $ 0

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