Equity (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended				9 Months Ended
	Oct. 28, 2016		Oct. 30, 2015		Oct. 28, 2016		Oct. 30, 2015
Equity
Reduction in retained earnings	$ 535		$ 714		$ 2,780		$ 3,092
Share Repurchases
Share repurchases, value	$ 574	[1]	$ 754	[1]	$ 3,026	[2]	$ 3,316	[2]
Share repurchases, shares	8.6		12.1		40.1		45.9
Share Repurchase Program [Member]
Share Repurchases
Share repurchases, value	$ 550	[1]	$ 750	[1]	$ 2,949	[2]	$ 3,250	[2]
Share repurchases, shares	8.3		12.0		39.0		45.0
Shares Withheld from Employees [Member]
Share Repurchases
Share repurchases, value	$ 24	[1]	$ 4	[1]	$ 77	[2]	$ 66	[2]
Share repurchases, shares	0.3		0.1		1.1		0.9

[1] Reductions of $535 million and $714 million were recorded to retained earnings, after capital in excess of par value was depleted, for the three months ended October 28, 2016 and October 30, 2015, respectively.

[2] Reductions of $2.8 billion and $3.1 billion were recorded to retained earnings, after capital in excess of par value was depleted, for the nine months ended October 28, 2016 and October 30, 2015, respectively.