Revenue, Accounts Receivable, Deferred Revenue, and Remaining Performance Obligations - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 31, 2025	Oct. 31, 2024	Oct. 31, 2025	Oct. 31, 2024	Jan. 31, 2025
Disaggregation of Revenue [Line Items]
Allowance for doubtful accounts	$ 3.7		$ 3.7		$ 4.8
Revenue recognized	897.0	$ 678.5	1,900.0	$ 1,600.0
Remaining performance obligation	$ 7,900.0		$ 7,900.0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-11-01
Disaggregation of Revenue [Line Items]
Revenue, remaining performance obligation, percentage	48.00%		48.00%
Remaining performance obligation, remaining life	12 months		12 months