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Inventories - Textuals (Details) - USD ($)
$ in Millions
Jan. 31, 2021
Jan. 31, 2020
Inventory [Line Items]    
Inventory held on consignment $ 3.5 $ 9.1
Prepaid Expenses and Other Current Assets    
Inventory [Line Items]    
Inventory return asset $ 22.5 $ 31.0