Condensed Income Statements - USD ($) shares in Millions, $ in Millions	3 Months Ended								9 Months Ended
	Oct. 31, 2015	Aug. 01, 2015	May. 02, 2015	[1]	Nov. 01, 2014	Aug. 02, 2014	May. 03, 2014	[1]	Oct. 31, 2015	Nov. 01, 2014
Income Statement [Abstract]
Sales	$ 1,216.4				$ 1,177.9				$ 4,157.6	$ 3,459.9
Cost of sales	(848.7)				(832.0)				(2,733.2)	(2,297.8)
Gross margin	367.7				345.9				1,424.4	1,162.1
Selling, general and administrative expenses	(395.0)				(388.7)				(1,301.0)	(1,078.4)
Other operating income, net	60.9				53.5				187.2	161.2
Operating income	33.6				10.7				310.6	244.9
Interest expense, net	(11.7)				(12.6)				(33.8)	(28.1)
Income (loss) before income taxes	21.9				(1.9)				276.8	216.8
Income taxes	(6.9)				0.6				(80.8)	(63.5)
Net income (loss)	$ 15.0				$ (1.3)				$ 196.0	$ 153.3
Earnings (loss) per share: basic (usd per share)	$ 0.19				$ (0.02)				$ 2.46	$ 1.92
Earnings (loss) per share: diluted (usd per share)	$ 0.19				$ (0.02)				$ 2.45	$ 1.91
Weighted average common shares outstanding: basic (shares)	79.3				79.9				79.7	79.9
Weighted average common shares outstanding: diluted (shares)	79.5				79.9				79.9	80.2
Dividends declared per share (usd per share)	$ 0.22	$ 0.22	$ 0.22		$ 0.18	$ 0.18	$ 0.18		$ 0.66	$ 0.54

[1] Signet’s dividend policy results in the dividend payment date being a quarter in arrears from the declaration date. As a result,