Acquisitions - Attivo, Narrative (Details) - USD ($)		12 Months Ended
	May 03, 2022	Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2023
Business Acquisition [Line Items]
Share-based payment arrangement, expense		$ 267,531,000	$ 216,870,000
General and administrative
Business Acquisition [Line Items]
Share-based payment arrangement, expense		80,973,000	83,890,000
Attivo
Business Acquisition [Line Items]
Percentage of voting interests acquired	100.00%
Share-based payment arrangement, expense	$ 32,900,000
Business combination, compensation related costs	$ 11,400,000
Business combination, acquisition related costs		0	0	$ 5,500,000
Attivo | General and administrative
Business Acquisition [Line Items]
Business combination, acquisition related costs				$ 3,200,000
Attivo | Restricted common stock
Business Acquisition [Line Items]
Share-based payment arrangement, expense		$ 300,000	$ 700,000
Restricted common stock acquired (in shares)	307,396
Restricted common stock acquired, fair value	$ 10,000,000
Assumed options from Attivo acquisition (in shares)	378,828
Assumed options from Attivo acquisition, fair value	$ 11,500,000