Nature Of Operations And Summary Of Significant Accounting Policies (Activity In The Allowance For Sales Returns, Net) (Details) - USD ($) $ in Millions		12 Months Ended
		Jan. 28, 2017	Jan. 30, 2016	Jan. 31, 2015
Accounting Policies [Abstract]
Allowance at beginning of year		$ 170	$ 160	$ 128
Charged to costs and expenses		3,023	2,720	2,129
Deductions	[1]	(3,006)	(2,710)	(2,097)
Allowance at end of year		$ 187	$ 170	$ 160

[1] Deductions consist of actual returns, net of the value of the merchandise returned and any sales commission.