Stock-based Compensation - Additional Information (Detail) $ / shares in Units, $ in Millions	9 Months Ended
	Oct. 31, 2024 USD ($) $ / shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Accrued stock-based compensation expense liabilities	$ 4.9
Closing price of ordinary shares | $ / shares	$ 56.19
Stock options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total unrecognized compensation cost, stock options	$ 2.9
Weighted average recognition period	6 months 29 days
Restricted stock units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total unrecognized compensation cost, restricted stock units	$ 176.9
Weighted average recognition period	2 years 6 months 18 days
Aggregate intrinsic value of unvested restricted stock units	$ 160.8