Deferred Tax Assets And Liabilities (Detail) (USD $) In Millions, unless otherwise specified	Feb. 02, 2013	Jan. 28, 2012
Deferred Tax Assets And Liabilities [Line Items]
Allowances for doubtful debts, Assets	$ 36.6	$ 29.2
Revenue deferral, Assets	122.4	104.6
Value of foreign capital losses, Assets	16.5	20.0
Total gross deferred tax asset	249.2	217.0
Valuation allowance, Asset	(17.5)	(21.1)
Deferred tax asset	231.7	195.9
Derivative instruments, Liabilities		(11.7)
Total gross deferred tax liability	(255.6)	(221.5)
Deferred tax liability	(255.6)	(221.5)
Allowances for doubtful debts, Total	36.6	29.2
Revenue deferral (extended service plans), Total	122.4	104.6
Derivative instruments, Total		(11.7)
Value of foreign capital losses, Total	16.5	20.0
Total gross deferred tax asset/(liability), Total	(6.4)	(4.5)
Valuation allowance, Total	(17.5)	(21.1)
Deferred tax asset/(liability), Total	(23.9)	(25.6)
Current assets	1.6	0.9
Current liabilities	(129.6)	(135.0)
Non-current assets	104.1	108.5
Deferred tax asset/(liability), Total	(23.9)	(25.6)
US
Deferred Tax Assets And Liabilities [Line Items]
Property, and equipment, Liabilities	(55.8)	(45.7)
Property, and equipment, Total	(55.8)	(45.7)
Foreign
Deferred Tax Assets And Liabilities [Line Items]
Property, and equipment, Assets	6.7	6.0
Property, and equipment, Total	6.7	6.0
Included In Income Taxes
Deferred Tax Assets And Liabilities [Line Items]
Straight line lease payments, Assets	26.8	23.7
Deferred compensation, Assets	7.7	4.7
Share-based compensation, Assets	10.7	9.7
US state income tax accruals, Assets	5.6	6.2
Other temporary differences, Assets	16.2	12.9
Inventory valuation, Liabilities	(188.6)	(156.2)
Retirement benefit obligations, Liabilities	(11.2)	(7.9)
Inventory valuation, Total	(188.6)	(156.2)
Straight line lease payments, Total	26.8	23.7
Deferred compensation, Total	7.7	4.7
Retirement benefit obligations, Total	(11.2)	(7.9)
Share-based compensation, Total	10.7	9.7
US state income tax accruals, Total	5.6	6.2
Other temporary differences, Total	$ 16.2	$ 12.9