Organization and Summary of Significant Accounting Policies Advertising expenses (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Jan. 28, 2017	Oct. 29, 2016	Jul. 30, 2016	Apr. 30, 2016	Jan. 30, 2016	Oct. 31, 2015	Aug. 01, 2015	May 02, 2015	Jan. 28, 2017	Jan. 30, 2016	Jan. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Gross advertising and promotional costs									$ 1,547	$ 1,587	$ 1,602
Cooperative advertising allowances									394	414	425
Advertising and promotional costs, net of cooperative advertising allowances									1,153	1,173	1,177
Net sales	$ 8,515	$ 5,626	$ 5,866	$ 5,771	$ 8,869	$ 5,874	$ 6,104	$ 6,232	$ 25,778	$ 27,079	$ 28,105
Advertising expense as a percent to sales									4.50%	4.30%	4.20%