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	Nov. 01, 2014	Feb. 01, 2014	Nov. 02, 2013	Feb. 02, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross, Value	$ 1,382.9	$ 1,453.8	$ 1,201.4
Valuation Allowance, Value	(102.6)	(97.8)	(89.6)	(87.7)
Gross, Percentage	100.00%	100.00%	100.00%
Valuation Allowance, Percentage	7.40%	6.70%	7.50%
Performing Financing Receivable
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross, Percentage	95.60%	96.30%	95.60%
Valuation Allowance, Percentage	3.10%	3.20%	3.20%
Performing Financing Receivable | Current | Aged 0-30 Days
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross, Value	1,087.9	1,170.4	946.9
Valuation Allowance, Value	(33.2)	(36.3)	(29.0)
Performing Financing Receivable | Past Due | Aged 31 - 90 Days
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross, Value	233.8	229.9	201.1
Valuation Allowance, Value	(8.2)	(8.0)	(7.2)
Nonperforming Financing Receivable
Financing Receivable, Allowance for Credit Losses [Line Items]
Gross, Percentage	4.40%	3.70%	4.40%
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	61.2	53.5	53.4
Valuation Allowance, Value	$ (61.2)	$ (53.5)	$ (53.4)