Fair Value Measurements - Liabilities Measured on Recurring Basis (Details) - Derivative Financial Instruments, Liabilities $ in Millions |
12 Months Ended |
|---|---|
|
Jan. 31, 2022
USD ($)
| |
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | |
| Beginning Balance | $ 11.8 |
| Issuance of common stock warrants | 0.5 |
| Changes in estimated fair value | 24.4 |
| Ending Balance | 0.0 |
| Common Stock Warrants | |
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | |
| Exercise of warrants | (35.5) |
| Preferred Stock Warrants | |
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | |
| Reclassification to equity-classified warrants | $ (1.2) |