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Business and Summary of Significant Accounting Policies - Concentration of Credit Risk (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Jan. 31, 2021 | Jan. 31, 2020 | Jan. 31, 2019 | Dec. 31, 2018
Accounting Policies [Abstract] |  |  |  |
Maximum borrowing capacity |  |  |  | $ 650.0
Tech Data | Sales Revenue, Net |  |  |  |
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items] |  |  |  |
Concentration risk, percentage | 37.00% | 35.00% | 35.00% |
Tech Data | Accounts Receivable |  |  |  |
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items] |  |  |  |
Concentration risk, percentage | 26.00% | 31.00% |  |
Ingram Micro | Sales Revenue, Net |  |  |  |
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items] |  |  |  |
Concentration risk, percentage | 10.00% | 10.00% | 11.00% |

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