Segments and Geographic Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 27, 2012	Oct. 29, 2011	Oct. 27, 2012 segment	Oct. 29, 2011	Jan. 28, 2012
Segments and Geographic Information
Number of reportable segments			1
Sales and assets by country
Net sales	$ 1,014	$ 996	$ 2,884	$ 2,806
Total Assets	1,901	1,780	1,901	1,780	1,822
United States
Sales and assets by country
Net sales	915	906	2,617	2,551
Total Assets	1,761	1,670	1,761	1,670	1,713
Canada
Sales and assets by country
Net sales	99	90	267	255
Total Assets	$ 140	$ 110	$ 140	$ 110	$ 109