Subsequent Events - Additional Information (Details) - USD ($)		12 Months Ended
	Mar. 14, 2022	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020	Nov. 27, 2021	Jul. 09, 2021
Subsequent Event [Line Items]
Common stock issued upon cashless exercise of stock options, shares		886,644	1,994,667
Weighted-average exercise price, per share		$ 9.59
Aggregate intrinsic value of exercised options		$ 17,900,000	$ 28,000,000.0	$ 5,900,000
Class A Common Stock | Share Repurchase Plan
Subsequent Event [Line Items]
Authorized purchase amount					$ 200,000,000	$ 500,000,000
Remaining authorized purchase amount						$ 260,000,000
Subsequent Event | Aaron Levie
Subsequent Event [Line Items]
Stock option expiration period	2022-04
Weighted-average exercise price, per share	$ 2.91
Aggregate intrinsic value of exercised options	$ 46,200,000
Subsequent Event | Class A Common Stock | Aaron Levie
Subsequent Event [Line Items]
Common stock issued upon cashless exercise of stock options, shares	1,100,000
Subsequent Event | Class A Common Stock | Share Repurchase Plan
Subsequent Event [Line Items]
Authorized purchase amount	$ 150,000,000