Income Taxes - Schedule of Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020
Income Tax Disclosure [Abstract]
Tax at federal statutory rate	$ 231,350	$ 142,387	$ 5,536
State taxes	24,840	636	14
Foreign rate differential	1,830	89	(2,096)
Stock-based compensation	(135,250)	(302,362)	(32,070)
Foreign-derived intangible income deduction	(34,131)	0	0
Permanent items	3,971	2,228	1,009
Research and development credits	(42,973)	(3,170)	(2,808)
Tax uncertainties	244	(607)	1,019
Change in valuation allowance	(322,231)	165,869	30,932
Other	(1,658)	648	(479)
Total (benefit from) provision for income taxes	$ (274,007)	$ 5,718	$ 1,057
Effective tax rate	(24.90%)	0.80%	4.00%