Deferred Revenue - Rollforward (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 28, 2017	Jan. 30, 2016
Sterling Jewelers
Deferred Revenue Arrangement [Line Items]
ESP deferred revenue, beginning of period	$ 715.1	$ 668.9
Plans sold	290.8	281.2
Revenue recognized	(268.5)	(235.0)
ESP deferred revenue, end of period	737.4	715.1
Zale
Deferred Revenue Arrangement [Line Items]
ESP deferred revenue, beginning of period	146.1	120.3
Plans sold	150.1	138.6
Revenue recognized	(128.0)	(112.8)
ESP deferred revenue, end of period	$ 168.2	$ 146.1