Deferred Revenue - Rollforward (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 30, 2016	Jan. 31, 2015
Sterling Jewelers
Deferred Revenue Arrangement [Line Items]
ESP deferred revenue, beginning of period	$ 668.9	$ 601.2
Plans sold	281.2	257.5
Revenue recognized	(235.0)	(189.8)
ESP deferred revenue, end of period	715.1	668.9
Zale
Deferred Revenue Arrangement [Line Items]
ESP deferred revenue, beginning of period	120.3	0.0
Plans acquired	0.0	93.3
Plans sold	138.6	88.4
Revenue recognized	(112.8)	(61.4)
ESP deferred revenue, end of period	$ 146.1	$ 120.3