Commitments and Contingencies - Narrative (Details) $ / shares in Units, shares in Millions, $ in Millions				12 Months Ended
	Jan. 04, 2017 employee	Aug. 12, 2015 USD ($) $ / shares	May 29, 2014 $ / shares	Jan. 28, 2017 USD ($) Property shares	Jan. 30, 2016 USD ($)	Aug. 01, 2015 USD ($)	May 28, 2014 lawsuit
Loss Contingencies [Line Items]
Number of property leases in United Kingdom | Property				26
Number of additional properties sublet | Property				12
Capital commitments related to expansion and renovation of stores				$ 48.4	$ 28.9
Common stock appraisal demanded and not withdrawn shares | shares				8.8
Zale Corporation
Loss Contingencies [Line Items]
Number of pending claims | lawsuit							3
Zale Corporation
Loss Contingencies [Line Items]
Business combination, price per share | $ / shares		$ 21.00	$ 21
Loss contingency accrual, provision		$ 34.2
Loss contingency, accrual, current						$ 34.2
Environmental Protection Agency Collective Action
Loss Contingencies [Line Items]
Number of plaintiffs | employee	10,456