Inventories - Narrative (Details) - USD ($) $ in Millions	May 04, 2019	Feb. 02, 2019	Feb. 03, 2018
Inventory Disclosure [Abstract]
Inventory reserves	$ 84.7	$ 95.3	$ 41.4

Amount of valuation reserve for inventory.

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Name:	us-gaap_InventoryValuationReserves
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant