REVENUE AND CONTRACT BALANCES - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 30, 2026	Apr. 30, 2025	Jan. 31, 2026
Disaggregation of Revenue [Line Items]
Unbilled receivables, current	$ 15.6		$ 6.7
Contract with customer, liability	586.2		$ 633.1
Contract with customer, liability, revenue recognized	208.7	$ 175.9
Revenue, remaining performance obligation, amount	$ 1,500.0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-05-01
Disaggregation of Revenue [Line Items]
Revenue, remaining performance obligation, percentage	81.00%
Revenue, remaining performance obligation, expected timing of satisfaction, period	24 months
Minimum
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, contract term	1 year
Maximum
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, contract term	3 years