Goodwill and Intangibles - Summary of Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 28, 2017	Jan. 30, 2016
Goodwill [Roll Forward]
Beginning balance	$ 515.5	$ 519.2
Impact of foreign exchange	2.1	(3.7)
Ending balance	517.6	515.5
Sterling Jewelers
Goodwill [Roll Forward]
Beginning balance	23.2	23.2
Impact of foreign exchange	0.0	0.0
Ending balance	23.2	23.2
Zale Jewelry
Goodwill [Roll Forward]
Beginning balance	488.7	492.4
Impact of foreign exchange	2.1	(3.7)
Ending balance	490.8	488.7
Piercing Pagoda
Goodwill [Roll Forward]
Beginning balance	0.0	0.0
Impact of foreign exchange	0.0	0.0
Ending balance	0.0	0.0
UK Jewelry
Goodwill [Roll Forward]
Beginning balance	0.0	0.0
Impact of foreign exchange	0.0	0.0
Ending balance	0.0	0.0
Other
Goodwill [Roll Forward]
Beginning balance	3.6	3.6
Impact of foreign exchange	0.0	0.0
Ending balance	$ 3.6	$ 3.6