Share Repurchase Activity (Detail) (USD $) In Millions, except Share data, unless otherwise specified	6 Months Ended		1 Months Ended	6 Months Ended				1 Months Ended	6 Months Ended
	Aug. 02, 2014	Aug. 03, 2013	Jun. 30, 2013 2013 Program	Aug. 02, 2014 2013 Program		Aug. 03, 2013 2013 Program		Oct. 31, 2011 2011 Program	Aug. 02, 2014 2011 Program		Aug. 03, 2013 2011 Program
Equity, Class of Treasury Stock [Line Items]
Amount Authorized			$ 350	$ 350	[1]			$ 300	$ 350	[2]
Shares repurchased	220,132	1,123,858		220,132	[1]	374,613	[1]			[2],[3]	749,245	[2]
Amount repurchased	$ 22.4	$ 75.1		$ 22.4	[1]	$ 25.0	[1]			[2],[3]	$ 50.1	[2]
Average repurchase price				$ 101.57	[1]	$ 66.74	[1]			[2],[3]	$ 66.92	[2]

[1] In June 2013, the Board of Directors authorized the repurchase of up to $350 million of Signet's common shares (the "2013 Program"). The 2013 Program may be suspended or discontinued at any time without notice. The 2013 Program had $273.0 million remaining as of August 2, 2014.

[2] In October 2011, the Board of Directors authorized the repurchase of up to $300 million of Signet's common shares (the "2011 Program"), which authorization was subsequently increased to $350 million. The 2011 Program was completed as of May 4, 2013.

[3] Not applicable.