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Share-based compensation	9 Months Ended
Share-based compensation	Oct. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-based compensation	Share-based compensation Signet recorded share-based compensation expense of $4.7 million and $11.8 million for the 13 and 39 weeks ended October 31, 2015, respectively, related to the Omnibus Plan and Share Saving Plans (13 and 39 weeks ended November 1, 2014: $3.5 million and $10.7 million, respectively).