Revenue - Additional Information (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jul. 31, 2025	Jul. 31, 2024	Jul. 31, 2025	Jul. 31, 2024	Jan. 31, 2025
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Deferred revenue	$ 309,200,000		$ 309,200,000		$ 359,800,000
Percent of revenue recognized from deferred revenue			21.00%	27.00%
Remaining performance obligation	794,200,000		$ 794,200,000
Unbilled contracts receivable	20,600,000		20,600,000		22,500,000
Deferred commissions	348,900,000		348,900,000		363,400,000
Noncurrent capitalized contract cost	229,300,000		229,300,000		$ 250,700,000
Amortization of deferred commissions	36,900,000	$ 27,200,000	68,000,000.0	$ 53,600,000
Impairment loss	$ 0	$ 0	$ 0	$ 0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, percentage	58.00%		58.00%
Expected timing of satisfaction of remaining performance obligation	12 months		12 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, percentage	38.00%		38.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01 | Minimum
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Expected timing of satisfaction of remaining performance obligation	13 months		13 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01 | Maximum
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Expected timing of satisfaction of remaining performance obligation	36 months		36 months