Accelerated Share Repurchase (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended			3 Months Ended			3 Months Ended
	Oct. 28, 2012	Oct. 30, 2011	Jan. 29, 2012	Jul. 29, 2012 Q1 Accelerated Share Repurchase Agreement [Member]	Apr. 29, 2012 Q1 Accelerated Share Repurchase Agreement [Member]	Oct. 28, 2012 Q1 Accelerated Share Repurchase Agreement [Member]	Oct. 28, 2012 Q2 Accelerated Share Repurchase Agreement [Member]	Jul. 29, 2012 Q2 Accelerated Share Repurchase Agreement [Member]	Oct. 28, 2012 Q3 Accelerated Share Repurchase Agreement [Member]	Oct. 28, 2012 Fair Market Value Of Accelerated Share Repurchases Included In Treasury Stock [Member]	Oct. 28, 2012 Accelerated Share Repurchase Additional Paid In Capital To Be Reclassified To Treasury Stock [Member]
Accelerated Share Repurchases [Line Items]
Cash paid for repurchase of common stock	$ 3,330	$ 3,056			$ 1,000			$ 1,400	$ 650	$ 526	$ 124
Number of shares of common stock repurchased pursuant to accelerated share repurchase agreement				3	17		5	22	9
Treasury Stock, Value	$ 9,869		$ 6,694			$ 1,000	$ 1,400