Allowance for Credit Losses On US Customer In-House Finance Receivables (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Feb. 02, 2013	Jan. 28, 2012	Jan. 29, 2011
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending balance	$ (87.7)	$ (78.1)	$ (67.8)
Ending receivable balance evaluated for impairment	1,280.6	1,155.5	995.5
Accounts receivable, net	1,205.3	1,088.2
US Customer In-House Finance Receivables
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	(78.1)	(67.8)	(72.2)
Charge-offs	112.8	92.8	119.0
Recoveries	21.8	19.3	17.4
Provision	(144.2)	(122.4)	(132.0)
Ending balance	(87.7)	(78.1)	(67.8)
Ending receivable balance evaluated for impairment	1,280.6	1,155.5	995.5
Accounts receivable, net	$ 1,192.9	$ 1,077.4	$ 927.7