Accelerated Share Repurchase Agreements (Narrative) (Details) - USD ($) shares in Millions, $ in Millions	1 Months Ended		2 Months Ended		3 Months Ended		6 Months Ended
	May. 03, 2015	Apr. 15, 2015	Aug. 02, 2015	May. 03, 2015	Aug. 02, 2015	May. 03, 2015	Aug. 02, 2015	Aug. 03, 2014	Feb. 01, 2015
Accelerated Share Repurchases [Line Items]
Cash paid for repurchase of common stock							$ 3,085	$ 3,500
Amount of ASR held in Treasury Stock			$ 29,116		$ 29,116		29,116		$ 26,194
Paid-In Capital			$ 8,972		8,972		8,972		$ 8,885
Q1 Accelerated Share Repurchase Agreement [Member]
Accelerated Share Repurchases [Line Items]
Cash paid for repurchase of common stock						$ 850
Number of shares of common stock repurchased pursuant to accelerated share repurchase agreement	0.5	7.0		7.5
Q2 Accelerated Share Repurchase Agreement [Member]
Accelerated Share Repurchases [Line Items]
Cash paid for repurchase of common stock					1,500
Number of shares of common stock repurchased pursuant to accelerated share repurchase agreement			12.0
Amount of ASR held in Treasury Stock			$ 1,338		1,338		1,338
Paid-In Capital			$ 162		$ 162		$ 162