Segment information - Information by Segment additional information (Details) - Operating Segments - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Aug. 01, 2015	Aug. 02, 2014	Aug. 01, 2015	Aug. 02, 2014
Zale Jewelry
Segment Reporting Information [Line Items]
Operating loss related to purchase accounting adjustments	$ 4.4	$ 9.4	$ 13.5	$ 9.4
Piercing Pagoda
Segment Reporting Information [Line Items]
Operating loss related to purchase accounting adjustments	0.7	2.1	3.0	2.1
Other
Segment Reporting Information [Line Items]
Transaction related and integration expense	$ 43.6	$ 30.8	$ 50.0	$ 39.2