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Share-based compensation	3 Months Ended
Share-based compensation	May 05, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-based compensation	Share-based compensation Signet recorded share-based compensation expense of $1.8 million for the 13 weeks ended May 5, 2018 related to the Omnibus Plan and Share Saving Plans ($2.7 million for the 13 weeks ended April 29, 2017).