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Financial Instruments and Fair Value - Additional Information (Detail) $ in Millions	3 Months Ended
	Apr. 30, 2023 USD ($) Security
Investments Debt And Equity Securities [Abstract]
Number of debt securities with unrealized losses for more than twelve months | Security	0
Interest income and realized gains and losses from available-for-sale debt securities | $	$ 1.0

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- Definition

Interest income and realized gains and losses from available-for-sale debt securities.

+ References

No definition available.

+ Details

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X

- 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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 50
-Paragraph 4
-Subparagraph (b)(3)
-URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922888-210455

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- References

No definition available.

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