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Equity Incentive Plans and Employee Stock Purchase Plan - Schedule of Restricted Stock Unit Activity (Details) - Restricted Stock Units (RSUs)
 9 Months Ended
Oct. 31, 2023
$ / shares
shares
Shares  
Unvested - beginning of period (in shares) | shares 3,480,206
RSUs granted (in shares) | shares 1,922,364
RSUs vested (in shares) | shares (1,256,300)
RSUs forfeited and canceled (in shares) | shares (410,853)
Unvested - end of period (in shares) | shares 3,735,417
Weighted-Average Grant Date Fair Value per RSU  
Unvested - beginning of period (in dollars per share) | $ / shares $ 288.58
RSUs granted (in dollars per share) | $ / shares 240.62
RSUs vested (in dollars per share) | $ / shares 254.88
RSUs forfeited and canceled (in dollars per share) | $ / shares 294.93
Unvested - end of period (in dollars per share) | $ / shares $ 286.22