REVENUE AND CONTRACT BALANCES - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 31, 2026	Jul. 31, 2025	Jul. 31, 2026	Jul. 31, 2025	Jan. 31, 2026
Disaggregation of Revenue [Line Items]
Unbilled receivables, current	$ 10.3		$ 10.3		$ 6.7
Contract with customer, liability	577.6		577.6		$ 633.1
Contract with customer, liability, revenue recognized	212.8	$ 181.2	372.6	$ 317.2
Revenue, remaining performance obligation, amount	$ 1,700.0		$ 1,700.0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-08-01
Disaggregation of Revenue [Line Items]
Revenue, remaining performance obligation, percentage	79.00%		79.00%
Revenue, remaining performance obligation, expected timing of satisfaction, period	24 months		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