Net Loss per Share Attributable to Common Stockholders - Net Loss per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Nov. 01, 2020	Oct. 31, 2021	Nov. 01, 2020
Earnings Per Share [Abstract]
Net loss	$ (28,731)	$ (74,222)	$ (158,202)	$ (229,783)
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic (in shares)	287,462	269,144	283,918	265,626
Weighted-average shares used in computing net loss per share attributable to common stockholders, diluted (in shares)	287,462	269,144	283,918	265,626
Net loss per share attributable to common stockholders, basic (in USD per share)	$ (0.10)	$ (0.28)	$ (0.56)	$ (0.87)
Net loss per share attributable to common stockholders, diluted (in USD per share)	$ (0.10)	$ (0.28)	$ (0.56)	$ (0.87)