Property and Accumulated Depreciation (Details 1) - USD ($) $ in Millions	Jan. 29, 2016	Jan. 30, 2015
Cost:
Land	$ 7,086	$ 7,040
Buildings and building improvements	17,451	17,247
Equipment	10,863	10,426
Construction in progress	513	730
Total cost	35,913	35,443
Accumulated depreciation	(16,336)	(15,409)
Property, less accumulated depreciation	$ 19,577	$ 20,034