Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2026	Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2023
Tax Credit Carryforward [Line Items]
Income tax benefit	$ (105,035)	$ 90,551	$ 116,679
Unrecognized tax benefits	68,157	56,334	41,772	$ 30,404
Unrecognized tax benefits, if recognized, would impact effective tax rate	82,500	66,000	46,500
Interest and penalties	14,300	9,700	4,700
Cash income taxes paid, net of amounts refunded	421,605	$ 395,400	$ 348,100
State and Local Jurisdiction
Tax Credit Carryforward [Line Items]
Operating loss carryforward	35,800
State and Local Jurisdiction | Research and Development Credit Carryforward
Tax Credit Carryforward [Line Items]
Tax credit carryforward	26,000
California
Tax Credit Carryforward [Line Items]
Income tax benefit	24,400
Federal
Tax Credit Carryforward [Line Items]
Operating loss carryforward	30,100
Federal | Research and Development Credit Carryforward
Tax Credit Carryforward [Line Items]
Tax credit carryforward	200
Foreign
Tax Credit Carryforward [Line Items]
Operating loss carryforward	$ 19,600