Stock-Based Compensation - Employee Stock Purchase Plan (Details) - USD ($)	3 Months Ended		9 Months Ended
	Oct. 31, 2023	Oct. 31, 2022	Oct. 31, 2023	Oct. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment arrangement, expense	$ 54,913,000	$ 45,687,000	$ 118,318,000	$ 163,308,000
Share-based payment arrangement, plan modification, incremental cost	2,400,000	2,600,000	6,400,000	2,600,000
ESPP shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment arrangement, expense	3,200,000	3,600,000	9,100,000	10,100,000
Share-based payment arrangement, plan modification, incremental cost	0	$ 100,000	300,000	$ 300,000
Cost not yet recognized amount	$ 0		$ 0