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.

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Name:	us-gaap_LossContingenciesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Organization and Basis of Presentation (Legal Settlement) (Details) - USD ($) $ in Millions		3 Months Ended
	Aug. 01, 2018	Apr. 28, 2019	Jan. 27, 2019	Jul. 29, 2018
Loss Contingencies [Line Items]
Legal recoveries	$ 9.0
Selling, General and Administrative Expenses [Member]
Loss Contingencies [Line Items]
Legal recoveries		$ 1.0	$ 1.3	$ 6.7