Stock-based Compensation - Additional Information (Detail) $ / shares in Units, $ in Millions	6 Months Ended
	Jul. 31, 2024 USD ($) $ / shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Accrued stock-based compensation expense liabilities	$ 3.2
Closing price of ordinary shares | $ / shares	$ 52.64
Stock options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total unrecognized compensation cost, stock options	$ 4.1
Weighted average recognition period	9 months 21 days
Restricted stock units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total unrecognized compensation cost, restricted stock units	$ 157.7
Weighted average recognition period	2 years 3 months 3 days
Aggregate intrinsic value of unvested restricted stock units	$ 124.4