Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2026	Jan. 31, 2025	Jan. 31, 2024
Operating Loss Carryforwards [Line Items]
Provision for (benefit from) income taxes	$ 15,460	$ (2,527)	$ 13,084
Valuation allowance	951,021	942,513	903,700
Valuation allowance, increase (decrease)	8,500	$ 38,900	$ 94,700
Foreign Tax Credit Carryforward
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards	6,900
United States
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	2,200,000
United States | Research Tax Credit Carryforward
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards	207,200
United States | Charitable Contribution Carryforward
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards	600
State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	2,000,000
State and Local Jurisdiction | Research Tax Credit Carryforward
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards	19,600
Ireland
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	857,200
United Kingdom
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 64,500