Share Repurchase Activity (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jul. 30, 2016	Aug. 01, 2015	Jul. 30, 2016	Aug. 01, 2015
Disclosure Share Repurchase Activity [Abstract]
Number of shares repurchased	0.0	10.0	0.0	15.6
Total cost	$ 0	$ 377	$ 0	$ 607
Average per share cost including commissions (in dollars per share)	$ 0.00	$ 37.60	$ 0.00	$ 38.82