Net Loss Per Share - Schedule of Basic and Diluted Net Loss Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2021
Numerator:
Net loss	$ (815)	$ (848)	$ (266)
Denominator:
Weighted-average shares used to compute net loss per share, basic (in shares)	158,023	148,036	127,212
Weighted-average shares used to compute net loss per share, diluted (in shares)	158,023	148,036	127,212
Net loss per share, basic (in dollars per share)	$ (5.16)	$ (5.73)	$ (2.09)
Net loss per share, diluted (in dollars per share)	$ (5.16)	$ (5.73)	$ (2.09)
Class A Common Stock
Denominator:
Weighted-average shares used to compute net loss per share, basic (in shares)	150,891	140,684	118,882
Weighted-average shares used to compute net loss per share, diluted (in shares)	150,891	140,684	118,882
Net loss per share, basic (in dollars per share)	$ (5.16)	$ (5.73)	$ (2.09)
Net loss per share, diluted (in dollars per share)	$ (5.16)	$ (5.73)	$ (2.09)
Class B Common Stock
Denominator:
Weighted-average shares used to compute net loss per share, basic (in shares)	7,132	7,352	8,330
Weighted-average shares used to compute net loss per share, diluted (in shares)	7,132	7,352	8,330
Net loss per share, basic (in dollars per share)	$ (5.16)	$ (5.73)	$ (2.09)
Net loss per share, diluted (in dollars per share)	$ (5.16)	$ (5.73)	$ (2.09)
Common Stock | Class A Common Stock
Numerator:
Net loss	$ (778)	$ (806)	$ (249)
Common Stock | Class B Common Stock
Numerator:
Net loss	$ (37)	$ (42)	$ (17)