Condensed Consolidated Income Statement (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	May 03, 2014	May 04, 2013
Condensed Financial Statements, Captions [Line Items]
Sales	$ 1,056.1	$ 993.6
Cost of sales	(648.9)	(610.8)
Gross margin	407.2	382.8
Selling, general and administrative expenses	(310.5)	(287.0)
Other operating income, net	54.0	47.0
Operating (loss) income	150.7	142.8
Interest expense, net	(1.8)	(0.9)
(Loss) income before income taxes	148.9	141.9
Income taxes	(52.3)	(50.1)
Net income	96.6	91.8
Signet Jewelers Limited
Condensed Financial Statements, Captions [Line Items]
Selling, general and administrative expenses	(0.4)	(0.4)
Operating (loss) income	(0.4)	(0.4)
(Loss) income before income taxes	(0.4)	(0.4)
Equity in income of subsidiaries	97.0	92.2
Net income	96.6	91.8
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Sales	1,043.7	981.7
Cost of sales	(647.6)	(609.3)
Gross margin	396.1	372.4
Selling, general and administrative expenses	(303.8)	(285.6)
Other operating income, net	52.0	47.4
Operating (loss) income	144.3	134.2
Intercompany interest (expense) income	(7.0)	(8.1)
Interest expense, net	(1.8)	(0.9)
(Loss) income before income taxes	135.5	125.2
Income taxes	(55.9)	(48.8)
Equity in income of subsidiaries	91.2	83.7
Net income	170.8	160.1
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Sales	12.4	11.9
Cost of sales	(1.3)	(1.5)
Gross margin	11.1	10.4
Selling, general and administrative expenses	(6.3)	(1.0)
Other operating income, net	2.0	(0.4)
Operating (loss) income	6.8	9.0
Intercompany interest (expense) income	7.0	8.1
(Loss) income before income taxes	13.8	17.1
Income taxes	3.6	(1.3)
Equity in income of subsidiaries	80.8	76.0
Net income	98.2	91.8
Eliminations
Condensed Financial Statements, Captions [Line Items]
Equity in income of subsidiaries	(269.0)	(251.9)
Net income	$ (269.0)	$ (251.9)