Allowance for Credit Losses On Sterling Jewelers Customer In-House Finance Receivables (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended		12 Months Ended
	Nov. 01, 2014	Nov. 02, 2013	Feb. 01, 2014
Financing Receivable, Allowance for Credit Losses [Line Items]
Accounts receivable, net	$ 1,292.1	$ 1,123.5	$ 1,374.0
Sterling Jewelers Customer In-House Finance Receivables
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	(97.8)	(87.7)	(87.7)
Charge-offs	101.0	91.0	128.2
Recoveries	22.1	19.9	26.0
Provision expense	(127.9)	(112.8)	(164.3)
Ending balance	(102.6)	(89.6)	(97.8)
Ending receivable balance evaluated for impairment	1,382.9	1,201.4	1,453.8
Accounts receivable, net	$ 1,280.3	$ 1,111.8	$ 1,356.0