Revenue, Accounts Receivable, Deferred Revenue, and Remaining Performance Obligations - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2022	Jul. 31, 2021	Jan. 31, 2022
Disaggregation of Revenue [Line Items]
Allowance for doubtful accounts	$ 1.5		$ 1.5		$ 1.3
Revenue recognized	380.4	$ 208.4	622.9	$ 343.8
Remaining performance obligation	$ 2,700.0		$ 2,700.0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-08-01
Disaggregation of Revenue [Line Items]
Revenue, remaining performance obligation, percentage	57.00%		57.00%
Remaining performance obligation, remaining life	12 months		12 months