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Stock-based Compensation - Additional Information (Detail) $ / shares in Units, $ in Millions	9 Months Ended
	Oct. 31, 2025 USD ($) $ / shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Accrued stock-based compensation expense liabilities	$ 5.6
Closing price of ordinary shares | $ / shares	$ 85.23
Restricted stock units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total unrecognized compensation cost, restricted stock units	$ 175.1
Weighted average recognition period	2 years 6 months 7 days
Aggregate intrinsic value of unvested restricted stock units	$ 247.9

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