Accelerated Share Repurchase (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	May 05, 2013	Apr. 29, 2012
Accelerated Share Repurchases [Line Items]
Cash paid for repurchase of common stock	$ 2,196	$ 1,131
2013 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	18
Fair Market Value Of Accelerated Share Repurchases Included In Treasury Stock [Member] | 2013 Accelerated Share Repurchase Agreement [Member]
Accelerated Share Repurchases [Line Items]
Cash paid for repurchase of common stock	1,300
Accelerated Share Repurchase Additional Paid In Capital To Be Reclassified To Treasury Stock [Member] | 2013 Accelerated Share Repurchase Agreement [Member]
Accelerated Share Repurchases [Line Items]
Cash paid for repurchase of common stock	$ 239