Additional Financial Statement Information Additional Financial Statement Information (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Jan. 28, 2017	Jan. 28, 2017	Jan. 30, 2016	Jan. 31, 2015
Additional Financial Statement Information [Abstract]
Depreciation		$ 590	$ 588	$ 560
Interest Costs Capitalized		9	8	7
Other Asset Impairment Charges		107	54	10
Goodwill, Impairment Loss	$ 71	$ 71	$ 0	$ 0