CASH, CASH EQUIVALENTS AND INVESTMENTS - Earnings on Cash and Invested Funds (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
Jul. 31, 2025 |
Jul. 31, 2024 |
Jul. 31, 2025 |
Jul. 31, 2024 |
Jan. 31, 2025 |
|
| CASH, CASH EQUIVALENTS AND INVESTMENTS | |||||
| Earnings on investments | $ 5.5 | $ 5.3 | $ 11.0 | $ 10.1 | |
| Weighted average annual yield | 4.00% | 4.00% | 4.10% | ||