Weighted Average Option Rollforward - (Details) - shares	3 Months Ended
Nov. 02, 2019	Aug. 03, 2019	May 04, 2019	Nov. 03, 2018	Aug. 04, 2018	May 05, 2018
shareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward
Exercised	0	0	0	0	8,051	0

Number of share options (or share units) exercised during the current period.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration