Share Repurchase Activity (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	1 Months Ended	9 Months Ended		1 Months Ended	9 Months Ended
	Jun. 14, 2013 2013 Program	Nov. 02, 2013 2013 Program		Oct. 31, 2011 2011 Program	Nov. 02, 2013 2011 Program
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, authorized amount	$ 350.0	$ 350.0	[1]	$ 300.0	$ 350.0	[2]
Stock repurchase program, remaining available amount		$ 300

[1] On June 14, 2013, the Board authorized a new program to repurchase 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 $300.0 million remaining as of November 2, 2013.

[2] In October 2011, the Board authorized a program to repurchase 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.