Stockholders' Equity - Schedule of Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Jan. 31, 2024	Jan. 31, 2023
Number of shares
Options outstanding, beginning balance (in shares)	11,503,409
Options granted (in shares)	2,511,610
Options exercised (in shares)	(2,277,533)
Options forfeited/cancelled (in shares)	(589,676)
Options outstanding, ending balance (in shares)	11,147,810	11,503,409
Options vested and exercisable (in shares)	4,962,412
Options vested and exercisable and expected to vest thereafter (in shares)	11,147,810
Weighted average exercise price
Options outstanding, beginning balance (in usd per share)	$ 128.62
Options granted (in usd per share)	180.59
Options exercised (in usd per share)	27.52
Options forfeited/cancelled (in usd per share)	200.03
Options outstanding, ending balance (in usd per share)	157.20	$ 128.62
Options vested and exercisable (in usd per share)	123.63
Options vested and exercisable and expected to vest thereafter (in usd per share)	$ 157.20
Weighted average remaining contractual term (in years), options outstanding	6 years 8 months 12 days	5 years 10 months 24 days
Weighted average remaining contractual term (in years), options vested and exercisable	5 years 1 month 6 days
Weighted average remaining contractual term (in years), options vested and exercisable and expected to vest thereafter	6 years 8 months 12 days
Aggregate intrinsic value (in millions)
Options outstanding	$ 626	$ 705
Options vested and exercisable	449
Options vested and exercisable and expected to vest thereafter	$ 626