Taxes (Reason For Difference Between Expected Tax Computed And Income Tax Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 28, 2017	Jan. 30, 2016	Jan. 31, 2015
Taxes Payable [Abstract]
Expected tax	$ 333	$ 587	$ 836
State and local income taxes, net of federal income tax benefit	12	43	59
Historic rehabilitation tax credit	(1)	(12)	(20)
Change in valuation allowance	9	3	1
Other	(12)	(13)	(12)
Income tax expense (benefit), total	$ 341	$ 608	$ 864