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Stockholders' Equity (Tables) | 9 Months Ended
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Oct. 31, 2023
Share-Based Payment Arrangement [Abstract] |
Schedule of Stock Option Activity | A summary of stock option activity for the nine months ended October 31, 2023 is as follows:
| Number of shares |  | Weighted average exercise price |  | Weighted average remaining contractual term (in years) |  | Aggregate intrinsic value (in millions)
Options outstanding at January 31, 2023 | 11,503,409 |  |  | $ | 128.62 |  |  | 5.9 |  | $ | 705 |
Options granted | 2,461,496 |  |  | 180.50 |  |  |  |  |
Options exercised | (2,170,451) |  |  | 24.04 |  |  |  |  |
Options forfeited/cancelled | (460,783) |  |  | 198.43 |  |  |  |  |
Options outstanding at October 31, 2023 | 11,333,671 |  |  | $ | 157.07 |  |  | 6.9 |  | $ | 527 |
Options vested and exercisable at October 31, 2023 | 4,805,463 |  |  | $ | 124.41 |  |  | 5.4 |  | $ | 375 |
Options vested and exercisable at October 31, 2023 and expected to vest thereafter | 11,333,671 |  |  | $ | 157.07 |  |  | 6.9 |  | $ | 527 |
Schedule of Weighted-Average Assumptions Used to Estimate Grant Date Fair Value of Options Granted | The following table presents the weighted-average assumptions used to estimate the grant date fair value of options granted during the periods presented:
|  | Three months ended October 31, |  | Nine months ended October 31,
|  | 2023 |  | 2022 |  | 2023 |  | 2022
Volatility |  | 41% |  | 39% | - | 40% |  | 39% | - | 41% |  | 37% | - | 40%
Expected term (in years) |  | 6.25 |  | 6.25 |  | 6.25 | - | 7 |  | 6 | - | 7
Risk-free interest rate |  | 4.44% | - | 4.73% |  | 2.90% | - | 4.20% |  | 3.34 | % | - | 4.73 | % |  | 1.90 | % | - | 4.20 | %
Dividend yield |  | —% |  | —% |  | —% |  | —%
Schedule of Restricted Stock Unit (RSU) Activity | A summary of restricted stock unit (RSU) activity for the nine months ended October 31, 2023 is as follows:
| Unreleased restricted stock units |  | Weighted average grant date fair value
Balance at January 31, 2023 | 1,103,679 |  |  | $ | 194.36 |
RSUs granted | 1,155,687 |  |  | 180.69 |
RSUs vested | (852,037) |  |  | 184.02 |
RSUs forfeited/cancelled | (106,600) |  |  | 183.68 |
Balance at October 31, 2023 | 1,300,729 |  |  | 189.86 |

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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Subparagraph (f)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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