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Stockholders' Equity - Additional Information (Details) $ in Millions | 9 Months Ended
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Oct. 31, 2021 USD ($) vote shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Unrecognized compensation cost | $ | $ 2
2012 Equity Incentive Plan |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Common stock available for future grants (in shares) | 58,000,000
Employee Stock Purchase Plan |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Common stock available for future grants (in shares) | 4,000,000
Employee Stock |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Percentage of fair market value of stock at which employees are granted shares | 85.00%
Restricted Stock Units |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Period of vesting | 4 years
Unrecognized compensation cost, other than options | $ | $ 2,000
Unrecognized compensation cost recognized over weighted-average period | 3 years
Stock Options |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Period of vesting | 5 years
Unrecognized compensation cost recognized over weighted-average period | 1 year
Period of which options become exercisable | 10 years
Class A |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Common stock, outstanding (in shares) | 193,000,000
Common stock, votes per share | vote | 1
Class B |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Common stock, outstanding (in shares) | 57,000,000
Common stock, votes per share | vote | 10

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