Credit Quality Indicator and Age Analysis of Past Due Sterling Jewelers Customer In-House Finance Receivables (Detail) (Sterling Jewelers Customer In-House Finance Receivables, USD $) In Millions, unless otherwise specified	Aug. 02, 2014	Feb. 01, 2014	Aug. 03, 2013	Feb. 02, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross, Value	$ 1,404.0	$ 1,453.8	$ 1,231.1
Valuation Allowance, Value	(98.9)	(97.8)	(89.1)	(87.7)
Gross, Percentage	100.00%	100.00%	100.00%
Valuation Allowance, Percentage	7.00%	6.70%	7.20%
Performing Financing Receivable
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross, Percentage	96.00%	96.30%	95.80%
Valuation Allowance, Percentage	3.10%	3.20%	3.00%
Performing Financing Receivable | Current | Aged 0-30 Days
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross, Value	1,110.6	1,170.4	973.2
Valuation Allowance, Value	(34.0)	(36.3)	(29.9)
Performing Financing Receivable | Past Due | Aged 31 - 90 Days
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross, Value	236.8	229.9	206.1
Valuation Allowance, Value	(8.3)	(8.0)	(7.4)
Nonperforming Financing Receivable
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross, Percentage	4.00%	3.70%	4.20%
Valuation Allowance, Percentage	100.00%	100.00%	100.00%
Nonperforming Financing Receivable | Past Due | Aged More Than 90 Days
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross, Value	56.6	53.5	51.8
Valuation Allowance, Value	$ (56.6)	$ (53.5)	$ (51.8)