Stockholders’ Equity and Equity Incentive Plans - Additional Information (Details)	3 Months Ended
	Apr. 30, 2022 USD ($) plan $ / shares shares	Feb. 28, 2022 USD ($)	Jan. 31, 2022 $ / shares shares	Apr. 30, 2019 $ / shares shares
Class of Stock [Line Items]
Common stock, par value (in dollars per share) | $ / shares	$ 0.001		$ 0.001
Stock repurchase plan, authorized amount		$ 1,000,000,000
Stock repurchased and retired during period (in shares) | shares	1,224,250
Stock repurchased and retired during period	$ 132,400,000
Remaining authorized amount	$ 867,600,000
Number of equity incentive plans | plan	2
Stock options
Class of Stock [Line Items]
Unrecognized stock-based compensation expenses related to outstanding unvested stock options	$ 12,700,000
Unrecognized stock-based compensation excepted to be recognized over a weighted-average period	7 months 6 days
RSUs
Class of Stock [Line Items]
Unrecognized stock-based compensation excepted to be recognized over a weighted-average period	3 years
Unrecognized stock-based compensation expenses	$ 2,173,600,000
Employee Stock Purchase Plan
Class of Stock [Line Items]
Unrecognized stock-based compensation excepted to be recognized over a weighted-average period	1 year 3 months 18 days
Unrecognized stock-based compensation expenses	$ 51,900,000
Class A Common Stock
Class of Stock [Line Items]
Common stock, authorized (in shares) | shares	2,000,000,000		2,000,000,000
Class A Common Stock | Initial public offering
Class of Stock [Line Items]
Common stock, authorized (in shares) | shares				2,000,000,000
Common stock, par value (in dollars per share) | $ / shares				$ 0.001
Class B Common Stock
Class of Stock [Line Items]
Common stock, authorized (in shares) | shares	300,000,000		300,000,000
Class B Common Stock | Initial public offering
Class of Stock [Line Items]
Common stock, authorized (in shares) | shares				300,000,000
Common stock, par value (in dollars per share) | $ / shares				$ 0.001