Dividends (Narrative) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	0 Months Ended	12 Months Ended
	Jan. 27, 2012	Jan. 28, 2012
Dividends Payable [Line Items]
Dividend value per share		$ 0.10
Dividend record date	Jan. 27, 2012
Dividend payable date		Feb. 27, 2012
Dividend paid		$ 8.7
Signet's Board Of Directors [Member]
Dividends Payable [Line Items]
Dividend value per share		$ 0.12
Dividend record date		Apr. 27, 2012
Dividend payable date		May 29, 2012
Common Shares At Par Value [Member]
Dividends Payable [Line Items]
Dividend value per share		$ 0.10
Dividend payable date		Nov. 28, 2011