LEASES - Lease cost (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 31, 2025	Oct. 31, 2024	Oct. 31, 2025	Oct. 31, 2024
Lease, Cost [Abstract]
Variable lease costs and short-term lease costs including rent forgiveness	$ 4.5	$ 5.0	$ 12.4	$ 16.1
Selling, general and administrative expenses
Lease, Cost [Abstract]
Lease costs	$ 18.3	$ 19.0	$ 54.3	$ 55.2