Cash, Cash Equivalents and Short-Term Investments - Narrative (Details) - USD ($)	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2021
Cash and Cash Equivalents [Line Items]
Cash		$ 884,700,000
Interest and investment income	$ 14,500,000	700,000	$ 1,100,000
Net amortization of premiums or discounts on short-term investments	$ 6,077,000	0	$ 0
Certificates of Deposit
Cash and Cash Equivalents [Line Items]
Short-term investments		$ 50,000,000