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
		Apr. 30, 2022	Apr. 30, 2021
Earnings Per Share [Abstract]
Net loss attributable to Class A and Class B common stockholders		$ (165,794)	$ (203,220)
Weighted-average shares used in computing net loss per share attributable to Class A common stockholders - basic (in shares)	[1]	314,361	291,386
Weighted-average shares used in computing net loss per share attributable to Class A common stockholders - diluted (in shares)	[1]	314,361	291,386
Net loss per share attributable to Class A common stockholders - basic (in dollars per share)	[1]	$ (0.53)	$ (0.70)
Net loss per share attributable to Class A common stockholders - diluted (in dollars per share)	[1]	$ (0.53)	$ (0.70)

[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.