Income Taxes - Narrative (Details) - USD ($)	12 Months Ended
	Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2023
Tax Credit Carryforward [Line Items]
Valuation allowance	$ 3,104,505,000	$ 2,621,009,000
Increase in valuation allowance	483,500,000	520,400,000	$ 241,900,000
Net operating loss carryforwards, U.S. federal	6,200,000,000
Net operating loss carryforwards, state	6,000,000,000
Net operating loss carryforwards, foreign	178,000,000
Interest and penalties	0	$ 0	$ 0
Federal
Tax Credit Carryforward [Line Items]
Net operating loss carryforwards, not subject to expiration	6,100,000,000
Net operating loss carryforward, subject to expiration	100,000,000
Deferred tax assets, tax credit carryforward, subject to expiration	482,900,000
Foreign
Tax Credit Carryforward [Line Items]
Net operating loss carryforwards, not subject to expiration	165,200,000
Net operating loss carryforward, subject to expiration	12,800,000
State
Tax Credit Carryforward [Line Items]
Deferred tax assets, tax credit carryforward, not subject to expiration	$ 212,200,000