Inventories - Textuals (Details) - USD ($) $ in Millions	Apr. 30, 2019	Jan. 31, 2019	Apr. 30, 2018
Inventory [Line Items]
Inventory held on consignment	$ 3.8	$ 4.9	$ 2.9
Prepaid Expenses and Other Current Assets
Inventory [Line Items]
Inventory returns assets	$ 35.5	$ 42.4	$ 39.4

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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