Revenue, Accounts Receivable, Deferred Revenue, and Remaining Performance Obligations - Narrative (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
Disaggregation of Revenue [Line Items]
Allowance for doubtful accounts	$ 7.8		$ 7.8		$ 4.8
Revenue recognized	827.6	$ 642.7	1,400.0	$ 1,200.0
Remaining performance obligation	$ 6,900.0		$ 6,900.0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-08-01
Disaggregation of Revenue [Line Items]
Revenue, remaining performance obligation, percentage	50.00%		50.00%
Remaining performance obligation, remaining life	12 months		12 months