Stockholders' Equity - Schedule of Stock Option Activity (Details) $ / shares in Units, $ in Millions	9 Months Ended	12 Months Ended
	Oct. 31, 2023 USD ($) $ / shares shares	Jan. 31, 2023 USD ($) $ / shares shares
Number of shares
Options outstanding, beginning balance (in shares) | shares	11,503,409
Options granted (in shares) | shares	2,461,496
Options exercised (in shares) | shares	(2,170,451)
Options forfeited/cancelled (in shares) | shares	(460,783)
Options outstanding, ending balance (in shares) | shares	11,333,671	11,503,409
Options vested and exercisable (in shares) | shares	4,805,463
Options vested and exercisable and expected to vest thereafter (in shares) | shares	11,333,671
Weighted average exercise price
Options outstanding, beginning balance (in usd per share) | $ / shares	$ 128.62
Options granted (in usd per share) | $ / shares	180.50
Options exercised (in usd per share) | $ / shares	24.04
Options forfeited/cancelled (in usd per share) | $ / shares	198.43
Options outstanding, ending balance (in usd per share) | $ / shares	157.07	$ 128.62
Options vested and exercisable (in usd per share) | $ / shares	124.41
Options vested and exercisable and expected to vest thereafter (in usd per share) | $ / shares	$ 157.07
Weighted average remaining contractual term (in years), Options outstanding	6 years 10 months 24 days	5 years 10 months 24 days
Weighted average remaining contractual term (in years), Options vested and exercisable	5 years 4 months 24 days
Weighted average remaining contractual term (in years), Options vested and exercisable and expected to vest thereafter	6 years 10 months 24 days
Aggregate intrinsic value (in millions)
Options outstanding | $	$ 527	$ 705
Options vested and exercisable | $	375
Options vested and exercisable and expected to vest thereafter | $	$ 527