Nature Of Operations And Summary Of Significant Accounting Policies (Vendor Allowances) (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 28, 2017	Jan. 30, 2016	Jan. 31, 2015
Nature Of Retail Operations [Line Items]
Total vendor allowances	$ 465	$ 455	$ 413
Cosmetic expenses [Member]
Nature Of Retail Operations [Line Items]
Total vendor allowances	166	161	140
Purchase price adjustments [Member]
Nature Of Retail Operations [Line Items]
Total vendor allowances	179	178	164
Cooperative advertising [Member]
Nature Of Retail Operations [Line Items]
Total vendor allowances	114	109	102
Other [Member]
Nature Of Retail Operations [Line Items]
Total vendor allowances	$ 6	$ 7	$ 7