Income Taxes - Narrative (Details) - USD ($)	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2021
Tax Credit Carryforward [Line Items]
Valuation allowance	$ 2,100,594,000	$ 1,858,730,000
Increase in valuation allowance	241,900,000	1,300,000,000	$ 434,500,000
Net operating loss carryforwards, U.S. federal	5,800,000,000
Net operating loss carryforwards, state	5,100,000,000
Net operating loss carryforwards, foreign	159,000,000
Interest and penalties	0	$ 0	$ 0
Federal
Tax Credit Carryforward [Line Items]
Net operating loss carryforwards, not subject to expiration	5,700,000,000
Net operating loss carryforward, subject to expiration	100,000,000
Deferred tax assets, tax credit carryforward, subject to expiration	254,500,000
Tax credits	254,500,000
Foreign
Tax Credit Carryforward [Line Items]
Net operating loss carryforwards, not subject to expiration	150,200,000
Net operating loss carryforward, subject to expiration	8,800,000
State
Tax Credit Carryforward [Line Items]
Tax credits	112,500,000
Deferred tax assets, tax credit carryforward, not subject to expiration	$ 112,500,000