Stockholders' Equity - Summary of Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022
Number of shares
Options outstanding, beginning balance (in shares)	12,090,522
Options granted (in shares)	3,267,206
Options exercised (in shares)	(3,421,303)
Options forfeited/cancelled (in shares)	(433,016)
Options outstanding, ending balance (in shares)	11,503,409	12,090,522
Options vested and exercisable (in shares)	5,370,570
Options vested and exercisable and expected to vest thereafter (in shares)	11,503,409
Weighted average exercise price
Options outstanding, beginning balance (in usd per share)	$ 77.89
Options granted (in usd per share)	205.48
Options exercised (in usd per share)	12.74
Options forfeited/cancelled (in usd per share)	209.53
Options outstanding, ending balance (in usd per share)	128.62	$ 77.89
Options vested and exercisable (in usd per share)	74.10
Options vested and exercisable and expected to vest thereafter (in usd per share)	$ 128.62
Weighted average remaining contractual term (in years), options outstanding	5 years 10 months 24 days	4 years 7 months 6 days
Weighted average remaining contractual term (in years), options vested and exercisable	3 years 10 months 24 days
Weighted average remaining contractual term (in years), options vested and exercisable and expected to vest thereafter	5 years 10 months 24 days
Aggregate intrinsic value (in millions)
Options outstanding	$ 705	$ 1,964
Options vested and exercisable	549
Options vested and exercisable and expected to vest thereafter	$ 705