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Summary of Business and Significant Accounting Policies (Effects of COVID-19 Pandemic) (Details) - USD ($) $ in Millions | 12 Months Ended
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Jan. 31, 2022 | Jan. 31, 2021
Accounting Policies [Abstract] |  |
Percentage increase (decrease) in order rates from prior year due to COVID | 40.00% | 20.00%
Additional compensation expense, COVID-related | $ 2 |

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