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Stockholders' Equity - Schedule of Stock Option Activity (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 12 Months Ended
Apr. 30, 2024
Jan. 31, 2024
Number of shares    
Options outstanding, beginning balance (in shares) 11,147,810  
Options granted (in shares) 1,914,837  
Options exercised (in shares) (178,777)  
Options forfeited/cancelled (in shares) (132,323)  
Options outstanding, ending balance (in shares) 12,751,547 11,147,810
Options vested and exercisable (in shares) 6,180,088  
Options vested and exercisable and expected to vest thereafter (in shares) 12,751,547  
Weighted average exercise price    
Options outstanding, beginning balance (in usd per share) $ 157.20  
Options granted (in usd per share) 214.82  
Options exercised (in usd per share) 159.05  
Options forfeited/cancelled (in usd per share) 208.61  
Options outstanding, ending balance (in usd per share) 165.33 $ 157.20
Options vested and exercisable (in usd per share) 136.47  
Options vested and exercisable and expected to vest thereafter (in usd per share) $ 165.33  
Weighted average remaining contractual term (in years), Options outstanding 6 years 10 months 24 days 6 years 8 months 12 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 $ 551 $ 626
Options vested and exercisable 441  
Options vested and exercisable and expected to vest thereafter $ 551