Net Income Per Section Net Income Per Section (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Oct. 28, 2017	Oct. 29, 2016	Oct. 28, 2017	Oct. 29, 2016
Basic (in dollars per share)	$ 0.70	$ 0.83	$ 2.33	$ 1.68
Diluted (in dollars per share)	$ 0.70	$ 0.83	$ 2.32	$ 1.68
Net income			$ 391	$ 303
Basic	166	177	168	180
Impact of dilutive stock-based awards	0	0	0	0
Diluted	166	177	168	180
Antidilutive shares	2	3	3	4
Retained Earnings [Member]
Net income	$ 117	$ 146	$ 391	$ 303