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Share-based compensation	6 Months Ended
Share-based compensation	Aug. 04, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-based compensation	Share-based compensation Signet recorded share-based compensation expense of $6.4 million and $8.2 million for the 13 and 26 weeks ended August 4, 2018 related to the Omnibus Plan and Share Saving Plans ($4.0 million and $6.7 million for the 13 and 26 weeks ended July 29, 2017).