Income Taxes (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jul. 31, 2022 |
Jul. 31, 2021 |
Jul. 31, 2022 |
Jul. 31, 2021 |
|
| Income Tax Disclosure [Abstract] | ||||
| Effective income tax rate reconciliation, percent | 8.40% | (0.30%) | 4.40% | (0.20%) |
| Discrete tax benefit | $ 9.7 | $ 9.7 | ||