Equity Plans and Stock-based Compensation - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions		12 Months Ended
	Feb. 25, 2021	Jan. 31, 2024	Jan. 31, 2023	Jan. 31, 2022
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Unrecognized stock-based compensation cost not yet recognized		$ 175.8
Period for recognition (in years)		2 years 7 months 6 days
2021 Equity Incentive Plan
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Possible increase in percent of outstanding shares (as a percent)	1.00%
Number of additional shares allowable under the plan (in shares)	5,400,000
Percent of outstanding shares (as a percent)	5.00%
2021 Stock Option Plan
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Total shares of common stock reserved (in shares)		34,331,567
Number of stock options granted (in shares)		0
2017 Stock Plan
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Total shares of common stock reserved (in shares)			10,369,118
2007 Stock Plan
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Total shares of common stock reserved (in shares)			1,027,638
Employee stock purchase plan
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Eligible compensation per employee (as a percent)	15.00%
Offering period (in months)	24 months
Purchase period (in months)	6 months
Purchase price of common stock, percent of fair value	85.00%
Maximum number of shares to be purchased per employee (in shares)	10,000
Total shares of common stock reserved (in shares)		13,139,772
Shares purchased (in shares)		1,273,933	607,384
Price per share (USD per share)		$ 6.54	$ 14.73
Proceeds from shares purchased		$ 8.3	$ 8.9
Restricted stock units
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Fair value of awards vested		84.5	58.4	$ 37.8
Options to purchase common stock | 2017 Stock Plan
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Grant date fair value		$ 46.3	$ 2.0	$ 3.4
Performance Restricted Stock Units | 2021 Equity Incentive Plan | Minimum
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Vesting period (in years)		4 years
Performance Restricted Stock Units | 2021 Equity Incentive Plan | Maximum
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Vesting period (in years)		5 years