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Stock-Based Compensation Plans - Summary of Performance Share Units Activity (Details) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended
--- | ---
Jan. 31, 2024 | Jan. 31, 2023 | Jan. 31, 2022
Stock-Based Compensation Plans |  |  |
Vested or expected to vest, shares (in shares) | 1,568,551 |  |
Vested or expected to vest, weighted-average granted date fair value (in dollars per share) | $ 52.31 |  |
Vested or expected to vest, weighted-average remaining contractual life (Year) | 3 years 10 months 24 days |  |
Vested or expected to vest, aggregate intrinsic value | $ 54.8 |  |
PSU |  |  |
Stock-Based Compensation Plans |  |  |
Number of Units Outstanding (in shares), Beginning | 915,233 | 777,538 |
Weighted-Average Granted Date Fair Value (in dollars per share), Beginning | $ 38.41 | $ 35.76 |
Weighted-Average Remaining Contractual (years) | 4 years 6 months | 4 years 6 months | 4 years 9 months 18 days
Aggregate Intrinsic Value | $ 86.3 | $ 67.9 | $ 57.4
PSUs Granted (in shares) | 95,134 | 97,991 |
PSUs Granted, weighted-average granted date fair value (in dollars per share) | $ 105.96 | $ 64.98 |
Performance units issued (in shares) | 68,005 | 39,704 |
Performance units issued, weighted-average granted date fair value (in dollars per share) | $ 53.80 | $ 54.34 |
Exercised (in shares) | (87,354) |  |
Exercised, weighted-average granted date fair value (in dollars per share) | $ 14.29 |  |
Forfeited (in shares) | (2,475) |  |
Forfeited, weighted-average granted date fair value (in dollars per share) | $ 81.82 |  |
Number of Units Outstanding (in shares), Ending | 988,543 | 915,233 | 777,538
Weighted-Average Granted Date Fair Value (in dollars per share), Ending | $ 53.81 | $ 38.41 | $ 35.76
Vested or expected to vest, shares (in shares) | 988,543 |  |
Vested or expected to vest, weighted-average granted date fair value (in dollars per share) | $ 53.81 |  |
Vested or expected to vest, weighted-average remaining contractual life (Year) | 4 years 6 months |  |
Vested or expected to vest, aggregate intrinsic value | $ 86.3 |  |
Exercisable, number of units (in shares) | 720,452 |  |
Exercisable, weighted-average granted date fair value (in dollars per share) | $ 36.60 |  |
Exercisable, weighted-average remaining contractual (years) | 3 years 2 months 12 days |  |
Exercisable, aggregate intrinsic value | $ 62.8 |  |

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