Shareholders' Equity (Details Textual) - USD ($)		12 Months Ended
		Jan. 29, 2016		Jan. 30, 2015		Jan. 31, 2014	Mar. 20, 2015
Share Repurchases
Share repurchases, shares		54,500,000		74,700,000
Share repurchases, value		$ 3,878,000,000	[1]	$ 3,927,000,000	[1]	$ 3,770,000,000
Shareholders' Equity
Preferred stock, shares authorized		5,000,000.0		5,000,000.0
Preferred stock, par value		$ 5		$ 5
Preferred stock, shares issued		0		0
Common stock, shares authorized		5,600,000,000.0		5,600,000,000.0
Common stock, par value		$ 0.50		$ 0.50
Share Repurchase Program [Member]
Share Repurchases
Share repurchases, shares		53,600,000		73,800,000
Share repurchases, value	[1]	$ 3,811,000,000		$ 3,880,000,000
Remaining share repurchases authorization, value		$ 3,600,000,000
January 31, 2014 Share Repurchase Authorization [Member]
Share Repurchases
Share repurchases authorized, value						$ 5,000,000,000.0
March 20, 2015 Share Repurchase Authorization [Member]
Share Repurchases
Share repurchases authorized, value							$ 5,000,000,000.0
Accelerated Share Repurchase Agreement Purchases [Member]
Share Repurchases
Share repurchases, shares		28,400,000
Share repurchases, value		$ 2,000,000,000
Open Market Purchases [Member]
Share Repurchases
Share repurchases, shares		25,200,000
Share repurchases, value		$ 1,800,000,000

[1] Reductions of $3.6 billion were recorded to retained earnings, after capital in excess of par value was depleted, for both 2015 and 2014.