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
	Nov. 01, 2020	Oct. 31, 2019	Nov. 01, 2020	Oct. 31, 2019
Earnings Per Share [Abstract]
Net loss	$ (74,222)	$ (29,982)	$ (229,783)	$ (196,336)
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic and diluted (in shares)	269,144	255,047	265,626	250,618
Net loss per share attributable to common stockholders, basic and diluted (in dollars per share)	$ (0.28)	$ (0.12)	$ (0.87)	$ (0.78)