STOCK-BASED COMPENSATION - Restricted Stock Units (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions |
3 Months Ended | |
|---|---|---|
Apr. 30, 2022 |
Apr. 30, 2021 |
|
| Summary of award activity | ||
| Beginning balance (in shares) | 2,454 | 2,950 |
| Granted (in shares) | 1,557 | 1,262 |
| Released (in shares) | (465) | (827) |
| Forfeited (in shares) | (47) | (41) |
| Ending balance (in shares) | 3,499 | 3,344 |
| Weighted-Average Grant-Date Fair Value | ||
| Beginning balance (in dollars per share) | $ 42.99 | $ 35.97 |
| Granted (in dollars per share) | 56.42 | 48.62 |
| Released (in dollars per share) | 42.20 | 35.33 |
| Forfeited (in dollars per share) | 43.13 | 35.61 |
| Ending balance (in dollars per share) | $ 49.07 | $ 40.91 |
| Restricted Stock Units (RSUs) | ||
| Summary of award activity | ||
| Granted (in shares) | 1,279 | |
| Additional disclosures | ||
| Unrecognized compensation expense | $ 129.0 | |
| Remaining weighted-average vesting period over which expense is expected to be recognized (in years) | 2 years | |