Quarterly Financial Information (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Feb. 02, 2013	Oct. 27, 2012	Jul. 28, 2012	Apr. 28, 2012	Jan. 28, 2012	Oct. 29, 2011	Jul. 30, 2011	Apr. 30, 2011	Feb. 02, 2013	Jan. 28, 2012	Jan. 29, 2011
Quarterly Financial Information [Line Items]
Sales	$ 1,513.3	$ 716.2	$ 853.9	$ 900.0	$ 1,353.8	$ 710.5	$ 797.6	$ 887.3	$ 3,983.4	$ 3,749.2	$ 3,437.4
Gross margin	637.1	235.4	311.2	353.7	563.2	229.9	294.8	349.7	1,537.4	1,437.6	1,242.9
Net income	$ 171.8	$ 34.9	$ 70.7	$ 82.5	$ 156.6	$ 26.1	$ 66.3	$ 75.4	$ 359.9	$ 324.4	$ 200.4
Earnings per share - basic	$ 2.13	$ 0.43	$ 0.86	$ 0.96	$ 1.81	$ 0.30	$ 0.77	$ 0.87	$ 4.37	$ 3.76	$ 2.34
Earnings per share - diluted	$ 2.12	$ 0.43	$ 0.85	$ 0.96	$ 1.79	$ 0.30	$ 0.76	$ 0.87	$ 4.35	$ 3.73	$ 2.32