Net Loss Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2021
Numerator
Net loss	$ (277,862)	$ (1,339,097)	$ (907,980)
Denominator
Weighted-average common shares outstanding basic (in shares)	162,493	161,966	160,397
Less: Weighted-average unvested common shares subject to repurchase or forfeiture (in shares)	(117)	(338)	(653)
Weighted-average common shares outstanding diluted (in shares)	162,376	161,628	159,744
Net loss per share
Net loss per share, basic (in dollars per share)	$ (1.71)	$ (8.29)	$ (5.68)
Diluted (in dollars per share)	$ (1.71)	$ (8.29)	$ (5.68)