Business and Summary of Accounting Policies Property and Equipment (Details) - USD ($) $ in Millions	Jan. 28, 2017	Jan. 30, 2016
Property, Plant and Equipment [Line Items]
Land	$ 1,118	$ 1,110
Store fixtures and equipment	1,711	1,804
Capitalized Computer Software, Gross	1,939	1,590
Construction in progress	318	167
Total property and equipment, at cost	14,891	14,518
Less accumulated depreciation	(6,788)	(6,210)
Property and equipment, net	8,103	8,308
Owned
Property, Plant and Equipment [Line Items]
Buildings and Improvements, Gross	8,004	7,999
Leased
Property, Plant and Equipment [Line Items]
Investment Building and Improvements, Gross	$ 1,801	$ 1,848