Net Loss per Share - Schedule of Basic and Diluted Net Loss per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended
		Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2022	Jul. 31, 2021
Earnings Per Share [Abstract]
Net loss attributable to Class A and Class B common stockholders		$ (222,806)	$ (189,719)	$ (388,600)	$ (392,939)
Weighted-average shares used in computing net loss per share attributable to Class A and Class B common stockholders - basic (in shares)	[1]	318,356	297,717	316,392	294,604
Weighted-average shares used in computing net loss per share attributable to Class A and Class B common stockholders - diluted (in shares)	[1]	318,356	297,717	316,392	294,604
Net loss per share attributable to Class A and Class B common stockholders- basic (in dollars per share)	[1]	$ (0.70)	$ (0.64)	$ (1.23)	$ (1.33)
Net loss per share attributable to Class A and Class B common stockholders - diluted (in dollars per share)	[1]	$ (0.70)	$ (0.64)	$ (1.23)	$ (1.33)

[1] On March 1, 2021, all shares of the Company’s then-outstanding Class B common stock were automatically converted into the same number of shares of Class A common stock, pursuant to the terms of the Company’s amended and restated certificate of incorporation. No additional shares of Class B common stock will be issued following such conversion. See Note 10 for further details.