Redeemable Convertible Preferred Stock	9 Months Ended
	Oct. 31, 2021
Temporary Equity Disclosure [Abstract]
Redeemable Convertible Preferred Stock	Redeemable Convertible Preferred StockDuring the nine months ended October 31, 2020, the Company issued 8,480,857 shares of Series G-1 redeemable convertible preferred stock and 3,868,970 shares of Series G-2 redeemable convertible preferred stock, each at a price of $38.77 per share. Upon completion of the IPO in September 2020, all shares of the Company’s redeemable convertible preferred stock outstanding, totaling 182,271,099, were automatically converted into an equivalent number of shares of Class B common stock on one-to-one basis and their carrying value of $1.4 billion was reclassified into stockholders’ equity. As of October 31, 2021 and January 31, 2021, there were no shares of redeemable convertible preferred stock issued and outstanding.