LEASES - Lease cost (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jul. 31, 2026 |
Jul. 31, 2025 |
Jul. 31, 2026 |
Jul. 31, 2025 |
|
| Lease, Cost [Abstract] | ||||
| Variable lease costs and short-term lease costs including rent forgiveness | $ 3.3 | $ 4.4 | $ 7.2 | $ 7.9 |
| Location, Statement of Income, Balance [Axis]: us-gaap:SellingGeneralAndAdministrativeExpense | ||||
| Lease, Cost [Abstract] | ||||
| Lease costs | $ 19.5 | $ 17.8 | $ 38.1 | $ 36.0 |