Pension Plans - Components of UK Net Asset Recognized (Details) - USD ($) $ in Millions	Feb. 03, 2018	Jan. 28, 2017
Defined Benefit Plan Disclosure [Line Items]
Non-current assets	$ 39.8	$ 31.9
Pension plan \| Foreign Plan
Defined Benefit Plan Disclosure [Line Items]
Non-current assets	$ 39.8	$ 31.9

Amount of asset, recognized in statement of financial position, for overfunded defined benefit pension and other postretirement plans.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Name:	us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant