Basis of Presentation Total Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Millions	Jul. 29, 2017	Jan. 28, 2017	Jul. 30, 2016	Jan. 30, 2016
Schedule of cash, cash equivalents and restricted cash [Line Items]
Cash and cash equivalents	$ 1,365	$ 2,240	$ 1,861
Restricted cash included in Other current assets	196	193	189
Cash, cash equivalents and restricted cash at end of period	$ 1,561	$ 2,433	$ 2,050	$ 2,161