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Share-based compensation	9 Months Ended
Share-based compensation	Nov. 03, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-based compensation	Share-based compensation Signet recorded share-based compensation expense of $7.3 million and $15.5 million for the 13 and 39 weeks ended November 3, 2018 related to the Omnibus Plan and Share Saving Plans ($4.3 million and $11.0 million for the 13 and 39 weeks ended October 28, 2017).