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

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.

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

Name:	us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant