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Acquisitions - Additional Information (Details)			3 Months Ended	12 Months Ended
Acquisitions - Additional Information (Details)	Nov. 20, 2024 USD ($)	Mar. 26, 2024 USD ($)	Apr. 30, 2025 USD ($) reporting_unit	Jan. 31, 2025 USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill			$ 913,285,000	$ 912,805,000
Number of reporting units \| reporting_unit			1
Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted-average remaining useful life			53 months	55 months
A.S. Adaptive Shield Ltd.
Acquired Finite-Lived Intangible Assets [Line Items]
Voting equity interest acquired	100.00%
Equity consideration for acquisitions	$ 213,700,000
Cash acquired from acquisition	13,700,000
Fair value of replacement equity awards	700,000
Fair value	31,100,000
Net tangible assets acquired	7,700,000
Goodwill	191,000,000.0
Acquisition costs			$ 0
A.S. Adaptive Shield Ltd. \| Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Fair value	$ 23,600,000
Weighted-average remaining useful life	72 months
Flow Security
Acquired Finite-Lived Intangible Assets [Line Items]
Voting equity interest acquired		100.00%
Equity consideration for acquisitions		$ 96,400,000
Cash acquired from acquisition		800,000
Fair value of replacement equity awards		500,000
Fair value		13,500,000
Net tangible assets acquired		600,000
Goodwill		$ 84,000,000
Acquisition costs			$ 0
Flow Security \| Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted-average remaining useful life		72 months