Stockholders' Equity and Equity Incentive Plans - Summary of Restricted Stock Units Activity Under Equity Incentive Plan (Details) - RSUs	12 Months Ended
	Jan. 31, 2022 $ / shares shares
Unvested RSUs
Beginning balance (in units) | shares	4,510,730
Granted (in units) | shares	3,195,949
Vested (in units) | shares	(1,768,702)
Cancelled/forfeited (in units) | shares	(391,611)
Ending balance (in units) | shares	5,546,366
Weighted-Average Grant Date Fair Value Per Share
Beginning balance (in dollars per unit) | $ / shares	$ 194.57
Granted (in dollars per unit) | $ / shares	265.12
Vested (in dollars per unit) | $ / shares	190.36
Cancelled/forfeited (in dollars per unit) | $ / shares	250.92
Ending balance (in dollars per unit) | $ / shares	$ 232.58