v3.25.1

Stock-based compensation - Narrative (Details) - USD ($) | 12 Months Ended
--- | ---
Jan. 31, 2025 | Jan. 31, 2024 | Jan. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Granted (in shares) | 0 | 0 | 0
Aggregate intrinsic value | $ 21,700,000 | $ 10,100,000 | $ 7,200,000
Unrecognized stock compensation expense related to options to be recognized in future | $ 0 |  |
Stock options |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Expiration period after termination (in years) | 10 years |  |
Expiration period from termination of employment (in days) | 90 days |  |
Restricted stock units |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Granted (in usd per share) | $ 86.07 | $ 64.16 | $ 75.64
Percentage of options vested (as a percent) | 25.00% |  |
Aggregate intrinsic value | $ 118,800,000 | $ 69,300,000 | $ 50,700,000
Compensation not yet recognized, other than options | $ 147,200,000 |  |
Recognition period for stock-based compensation (in years) | 2 years |  |
Performance Restricted Stock Units, Subject To Market Conditions |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Performance units awarded (in shares) | 182,044 |  |
Grant date fair value | $ 20,200,000 |  |
Performance Restricted Stock Units, Subject To Market Conditions | Minimum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Percentage of options vested (as a percent) | 0.00% |  |
Performance Restricted Stock Units, Subject To Market Conditions | Maximum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Percentage of options vested (as a percent) | 200.00% |  |
Performance Restricted Stock Units, Subject To Certain Financial Criteria |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Performance units awarded (in shares) | 60,682 |  |
Performance Restricted Stock Units, Subject To Certain Financial Criteria | Minimum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Percentage of options vested (as a percent) | 0.00% |  |
Performance Restricted Stock Units, Subject To Certain Financial Criteria | Maximum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Percentage of options vested (as a percent) | 200.00% |  |
Incentive Plan |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares available for grant under incentive plan (in shares) | 3,800,000 |  |

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- Definition Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Line items represent financial concepts included in a table. 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- Definition Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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