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Income Taxes - Narrative (Details) - USD ($) | 12 Months Ended
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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 |  |

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